19 KHACHATRYAN 14M search for production of a Higgs boson in gluon fusion and in association with a b quark followed by the decay $H_{1,2}^0/A^0 \to \tau^+\tau^-$ in 4.9 fb$^{-1}$ of pp collisions at $E_{cm} = 7$ TeV and 19.7 fb$^{-1}$ at $E_{cm} = 8$ TeV. See their Figs. 7 and 8 for one- and two-dimensional limits on cross section times branching ratio and their Figs. 5 and 6 for the excluded region in the MSSM parameter space. For $m_{A^0} = 140$ GeV, the region $\tan\beta > 3.8$ is excluded at 95% CL in the $m_h^{\text{max}}$ scenario.

20 AAD 130 search for production of a Higgs boson in the decay $H_{1,2}^0/A^0 \to \tau^+\tau^-$ and $\mu^+\mu^-$ with 4.7-4.8 fb$^{-1}$ of pp collisions at $E_{cm} = 7$ TeV. See their Fig. 6 for the excluded region in the MSSM parameter space and their Fig. 7 for the limits on cross section times branching ratio. For $m_{A^0} = 110-170$ GeV, $\tan\beta \gtrsim 10$ is excluded, and for $\tan\beta = 50$, $m_{A^0}$ below 470 GeV is excluded at 95% CL in the $m_h^{\text{max}}$ scenario.

21 AAJ 13T search for production of a Higgs boson in the forward region in the decay $H_{1,2}^0/A^0 \to \tau^+\tau^-$ in 1.0 fb$^{-1}$ of pp collisions at $E_{cm} = 7$ TeV. See their Fig. 2 for the limits on cross section times branching ratio and the excluded region in the MSSM parameter space.

22 CHATRCHYAN 13AG search for production of a Higgs boson in association with a b quark in the decay $H_{1,2}^0/A^0 \to b\bar{b}$ in 2.7-4.8 fb$^{-1}$ of pp collisions at $E_{cm} = 7$ TeV. See their Fig. 6 for the excluded region in the MSSM parameter space and Fig. 5 for the limits on cross section times branching ratio. For $m_{A^0} = 90-350$ GeV, upper bounds on $\tan\beta$ of 18-42 at 95% CL are obtained in the $m_h^{\text{max}}$ scenario with $\mu = +200$ GeV.

23 AALTONEN 12AQ combine AALTONEN 12x and ABAZOV 11K. See their Table I and Fig. 1 for the limit on cross section times branching ratio and Fig. 2 for the excluded region in the MSSM parameter space.

24 AALTONEN 12x search for associated production of a Higgs boson and a b quark in the decay $H_{1,2}^0/A^0 \to b\bar{b}$, with 2.6 fb$^{-1}$ of $p\bar{p}$ collisions at $E_{cm} = 1.96$ TeV. See their Table III and Fig. 15 for the limit on cross section times branching ratio and Figs. 17, 18 for the excluded region in the MSSM parameter space.

25 ABAZOV 12G search for production of a Higgs boson in the decay $H_{1,2}^0/A^0 \to \tau^+\tau^-$ with 7.3 fb$^{-1}$ of $p\bar{p}$ collisions at $E_{cm} = 1.96$ TeV and combine with ABAZOV 11W and ABAZOV 11K. See their Figs. 4, 5, and 6 for the excluded region in the MSSM parameter space. For $m_{A^0} = 90-180$ GeV, $\tan\beta \gtrsim 30$ is excluded at 95% CL in the $m_h^{\text{max}}$ scenario.

26 CHATRCHYAN 12K search for production of a Higgs boson in the decay $H_{1,2}^0/A^0 \to \tau^+\tau^-$ with 4.6 fb$^{-1}$ of $p\bar{p}$ collisions at $E_{cm} = 7$ TeV. See their Fig. 3 and Table 4 for the excluded region in the MSSM parameter space. For $m_{A^0} = 160$ GeV, the region $\tan\beta > 7.1$ is excluded at 95% CL in the $m_h^{\text{max}}$ scenario. Superseded by KHACHATRYAN 14M.

27 ABAZOV 11K search for associated production of a Higgs boson and a b quark, followed by the decay $H_{1,2}^0/A^0 \to b\bar{b}$, in 5.2 fb$^{-1}$ of $p\bar{p}$ collisions at $E_{cm} = 1.96$ TeV. See their Fig. 5/Table 2 for the limit on cross section times branching ratio and Fig. 6 for the excluded region in the MSSM parameter space for $\mu = -200$ GeV.

28 ABAZOV 11W search for associated production of a Higgs boson and a b quark, followed by the decay $H_{1,2}^0/A^0 \to \tau\tau$, in 7.3 fb$^{-1}$ of $p\bar{p}$ collisions at $E_{cm} = 1.96$ TeV. See their Fig. 2 for the limit on cross section times branching ratio and for the excluded region in the MSSM parameter space.

29 AALTONEN 09AR search for Higgs bosons decaying to $\tau^+\tau^-$ in two doublet models in 1.8 fb$^{-1}$ of $p\bar{p}$ collisions at $E_{cm} = 1.96$ TeV. See their Fig. 2 for the limit on $\sigma \cdot (B(H_0^0 Z \to \tau^+\tau^-) + \text{different Higgs masses},$ and see their Fig. 3 for the excluded region in the MSSM parameter space.

30 ABDALLAH 08B give limits in eight CP-conserving benchmark scenarios and some CP-violating scenarios. See paper for excluded regions for each scenario. Supersedes AB-DALLAH 04.

31 SCHAEL 06B make a combined analysis of the LEP data. The quoted limit is for the $m_h^{\text{max}}$ scenario with $m_t = 174.3$ GeV. In the CP-violating CPX scenario no lower bound on $m_{H_0^0}$ can be set at 95% CL. See paper for excluded regions in various scenarios. See Figs. 2-6 and Tabs. 14-21 for limits on $\sigma(ZH^0) \cdot (B(H_0^0 \to b\bar{b}, \tau^+\tau^-) + \sigma(H_0^0 H_0^0/2)) \cdot (B(H_0^0 H_0^0 \to b\bar{b}, \tau^+\tau^-))$.

32 ACOSTA 05Q search for $H_{1,2}^0/A^0$ production in $p\bar{p}$ collisions at $E_{cm} = 1.8$ TeV with $H_{1,2}^0/A^0 \to \tau^+\tau^-$. At $m_{A^0} = 100$ GeV, the obtained cross section upper limit is above theoretical expectation.

33 Search for $e^+e^- \to H_0^0 A^0$ in the final states $b\bar{b}b\bar{b}$ and $b\bar{b}\tau^+\tau^-$, and $e^+e^- \to H_0^0 Z$. Universal scalar mass of 1 TeV, SU(2) gaugino mass of 200 GeV, and $\mu = -200$ GeV are assumed, and two-loop radiative corrections incorporated. The limits hold for $m_t=175$ GeV, and for the $m_h^{\text{max}}$ scenario.

34 ABBIENDI 04M exclude $0.7 < \tan\beta < 1.9$, assuming $m_t = 174.3$ GeV. Limits for other MSSM benchmark scenarios, as well as for CP violating cases, are also given.

35 ABBIENDI 03G search for $e^+e^- \to H_0^0 Z$ followed by $H_0^0 \to A^0 A^0$, $A^0 \to c\bar{c}, gg$, or $\tau^+\tau^-$. In the no-mixing scenario, the region $m_{H_0^0} = 45-85$ GeV and $m_{A^0} = 2-9.5$ GeV is excluded at 95% CL.

36 ACHARD 02H also search for the final state $H_0^0 Z \to 2A^0 q\bar{q}$, $A^0 \to q\bar{q}$. In addition, the MSSM parameter set in the "large-$\mu$" and "no-mixing" scenarios are examined.

37 AKEROYD 02 examine the possibility of a light $A^0$ with $\tan\beta < 1$. Electroweak measurements are found to be inconsistent with such a scenario.

38 HEISTER 02 excludes the range $0.7 < \tan\beta < 2.3$. A wider range is excluded with different stop mixing assumptions. Updates BARATE 01C.

### Mass Limits for $H_0^0$ (Higgs Boson) in Supersymmetric Models

<table><thead><tr><th>VALUE (GeV)</th><th>CL%</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>&gt;89.7</td><td></td><td>1 ABDALLAH</td><td>08B</td><td>E<sub>cm</sub> ≤ 209 GeV</td></tr><tr><td>&gt;92.8</td><td>95</td><td>2 SCHAEL</td><td>06B</td><td>E<sub>cm</sub> ≤ 209 GeV</td></tr><tr><td>&gt;84.5</td><td>95</td><td>3.4 ABBIENDI</td><td>04M</td><td>E<sub>cm</sub> ≤ 209 GeV</td></tr></tbody></table>

<table><tr><td>&gt;86.0</td><td>95</td><td>3.5 ACHARD</td><td>02H</td><td>L3</td><td>E<sub>cm</sub> ≤ 209 GeV, tanβ > 0.4</td></tr><tr><td>&gt;89.8</td><td>95</td><td>3.6 HEISTER</td><td>02</td><td>ALEP</td><td>E<sub>cm</sub> ≤ 209 GeV, tanβ > 0.5</td></tr></table>

• • • We do not use the following data for averages, fits, limits, etc. • • •

$$7 \text{ AALTONEN} \quad 12\text{AQ TEVA} \quad p\bar{p} \to \frac{H_0^0}{1.2}/A^0 + b + X, \\ \frac{H_0^0}{1.2}/A^0 \to b\bar{b}$$

1 ABDALLAH 08B give limits in eight CP-conserving benchmark scenarios and some CP-violating scenarios. See paper for excluded regions for each scenario. Supersedes AB-DALLAH 04.

2 SCHAEL 06B make a combined analysis of the LEP data. The quoted limit is for the $m_h^{\text{max}}$ scenario with $m_t = 174.3$ GeV. In the CP-violating CPX scenario no lower bound on $m_{H_0^0}$ can be set at 95% CL. See paper for excluded regions in various scenarios. See Figs. 2-6 and Tabs. 14-21 for limits on $\sigma(ZH^0) \cdot (B(H_0^0 \to b\bar{b}, \tau^+\tau^-) + \sigma(H_0^0 H_0^0/2)) \cdot (B(H_0^0 H_0^0 \to b\bar{b}, \tau^+\tau^-))$.

3 Search for $e^+e^- \to H_0^0 A^0$ in the final states $b\bar{b}b\bar{b}$ and $b\bar{b}\tau^+\tau^-$, and $e^+e^- \to H_0^0 Z$. Universal scalar mass of 1 TeV, SU(2) gaugino mass of 200 GeV, and $\mu = -200$ GeV are assumed, and two-loop radiative corrections incorporated. The limits hold for $m_t=175$ GeV, and for the $m_h^{\text{max}}$ scenario.

4 ABBIENDI 04M exclude $0.7 < \tan\beta < 1.9$, assuming $m_t = 174.3$ GeV. Limits for other MSSM benchmark scenarios, as well as for CP violating cases, are also given.

5 ACHARD 02H also search for the final state $H_0^0 Z \to 2A^0 q\bar{q}$, $A^0 \to q\bar{q}$. In addition, the MSSM parameter set in the "large-$\mu$" and "no-mixing" scenarios are examined.

6 HEISTER 02 excludes the range $0.7 < \tan\beta < 2.3$. A wider range is excluded with different stop mixing assumptions. Updates BARATE 01C.

7 AALTONEN 12AQ combine AALTONEN 12x and ABAZOV 11K. See their Table I and Fig. 1 for the limit on cross section times branching ratio and Fig. 2 for the excluded region in the MSSM parameter space.

### MASS LIMITS FOR NEUTRAL HIGGS BOSONS IN EXTENDED HIGGS MODELS

This Section covers models which do not fit into either the Standard Model or its simplest minimal Supersymmetric extension (MSSM), leading to anomalous production rates, or nonstandard final states and branching ratios. In particular, this Section covers limits which may apply to generic two-Higgs-doublet models (2HDM), or to special regions of the MSSM parameter space where decays to invisible particles or to photon pairs are dominant (see the review on "Status of Higgs Boson Physics"). Concerning the mass limits for $H^0$ and $A^0$ listed below, see the footnotes or the comment lines for details on the nature of the models to which the limits apply.

The observed signal at about 125 GeV, see section "H", can be interpreted as one of the neutral Higgs bosons of an extended Higgs sector.

### Mass Limits in General two-Higgs-doublet Models

<table><thead><tr><th>VALUE (GeV)</th><th>CL%</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>1 AAD</td><td></td><td>23AD ATLS</td><td>A<sup>0</sup> → ZH<sup>0</sup><sub>2</sub>, H<sup>0</sup><sub>2</sub> → HH</td><td></td></tr><tr><td>2 AAD</td><td></td><td>23BG ATLS</td><td>t<span style="text-decoration: overline;">H</span><sup>0</sup><sub>2</sub>/A<sup>0</sup></td><td></td></tr><tr><td>3 AAD</td><td></td><td>23O ATLS</td><td>A<sup>0</sup> → ZH</td><td></td></tr><tr><td>4 AAD</td><td></td><td>21AF ATLS</td><td>H<sup>0</sup><sub>2</sub> → ZZ</td><td></td></tr><tr><td>5 AAD</td><td></td><td>21AI ATLS</td><td>A<sup>0</sup> → ZH<sup>0</sup><sub>2</sub></td><td></td></tr><tr><td>6 AAD</td><td></td><td>20 ATLS</td><td>H<sup>0</sup> → properties</td><td></td></tr><tr><td>7 AAD</td><td></td><td>20L ATLS</td><td>H<sup>0</sup><sub>2</sub> → b<span style="text-decoration: overline;">b</span></td><td></td></tr><tr><td>8 SIRUNYAN</td><td></td><td>20AA CMS</td><td>H<sup>0</sup><sub>2</sub> → ZA<sup>0</sup> or A<sup>0</sup> → ZH<sup>0</sup><sub>2</sub></td><td></td></tr><tr><td>9 SIRUNYAN</td><td></td><td>20Y CMS</td><td>H<sup>0</sup><sub>2</sub> → W<sup>+</sup>W<sup>-</sup></td><td></td></tr><tr><td>10 SIRUNYAN</td><td></td><td>19AE CMS</td><td>A<sup>0</sup> → τ<sup>+</sup>τ<sup>-</sup></td><td></td></tr><tr><td>11 SIRUNYAN</td><td></td><td>19AV CMS</td><td>A<sup>0</sup> → ZH<sup>0</sup></td><td></td></tr><tr><td>12 AABOUD</td><td></td><td>18AH ATLS</td><td>A<sup>0</sup> → ZH<sup>0</sup><sub>2</sub></td><td></td></tr><tr><td>13 AABOUD</td><td></td><td>18AI ATLS</td><td>A<sup>0</sup> → ZH<sup>0</sup></td><td></td></tr><tr><td>14 AABOUD</td><td></td><td>18BF ATLS</td><td>H<sup>0</sup><sub>2</sub> → ZZ</td><td></td></tr><tr><td>15 AABOUD</td><td></td><td>18CE ATLS</td><td>pp → H<sup>0</sup><sub>2</sub>/A<sup>0</sup> t<span style="text-decoration: overline;">t</span>,<br>H<sup>0</sup><sub>2</sub>/A<sup>0</sup> → t<span style="text-decoration: overline;">t</span></td><td></td></tr><tr><td>16 HALLER</td><td></td><td>18 RVUE</td><td>globa<sup>l</sup> fits</td><td></td></tr><tr><td>17 SIRUNYAN</td><td></td><td>18BP CMS</td><td>pp → H<sup>0</sup><sub>2</sub>/A<sup>0</sup> + b + X,<br>H<sup>0</sup><sub>2</sub>/A<sup>0</sup> → b<span style="text-decoration: overline;">b</span></td><td></td></tr><tr><td>18 SIRUNYAN</td><td></td><td>18ED CMS</td><td>A<sup>0</sup> → ZH<sup>0</sup></td><td></td></tr><tr><td>19 AABOUD</td><td></td><td>17AN ATLS</td><td>H<sup>0</sup><sub>2</sub>, A<sup>0</sup> → t<span style="text-decoration: overline;">t</span></td><td></td></tr><tr><td>20 SIRUNYAN</td><td></td><td>17AX CMS</td><td>A<sup>0</sup> b<span style="text-decoration: overline;">b</span>, A<sup>0</sup> → μ<sup>+</sup>μ<sup>-</sup></td><td></td></tr><tr><td>21 AAD</td><td></td><td>16AX ATLS</td><td>H<sup>0</sup><sub>2</sub> → ZZ</td><td></td></tr><tr><td>22 KHACHATRY...16P CMS</td><td></td><td>H<sup>0</sup><sub>2</sub> → H<sup>0</sup> H<sup>0</sup>, A<sup>0</sup> → ZH<sup>0</sup></td><td></td><td></td></tr><tr><td>23 KHACHATRY...16W CMS</td><td></td><td>A<sup>0</sup> b<span style="text-decoration: overline;">b</span>, A<sup>0</sup> → τ<sup>+</sup>τ<sup>-</sup></td><td></td><td></td></tr><tr><td>24 KHACHATRY...16Z CMS</td><td></td><td>H<sup>0</sup><sub>2</sub> → ZA<sup>0</sup> or A<sup>0</sup> → ZH<sup>0</sup><sub>2</sub></td><td></td><td></td></tr><tr><td>25 AAD</td><td></td><td>15BK ATLS</td><td>H<sup>0</sup><sub>2</sub> → H<sup>0</sup> H<sup>0</sup></td><td></td></tr><tr><td>26 AAD</td><td></td><td>15S ATLS</td><td>A<sup>0</sup> → ZH<sup>0</sup></td><td></td></tr><tr><td>27 KHACHATRY...15BB CMS</td><td></td><td>H<sup>0</sup><sub>2</sub>, A<sup>0</sup> → γγ</td><td></td><td></td></tr><tr><td>28 KHACHATRY...15N CMS</td><td></td><td>A<sup>0</sup> → ZH<sup>0</sup></td><td></td><td></td></tr><tr><td>29 AAD</td><td></td><td>14M ATLS</td><td>H<sup>0</sup><sub>2</sub> → H<sup>±</sup>W<sup>∓</sup> →<br>H<sup>0</sup> W<sup>±</sup>W<sup>∓</sup>, H<sup>0</sup> → b<span style="text-decoration: overline;">b</span></td><td></td></tr><tr><td>30 KHACHATRY...14Q CMS</td><td></td><td></td><td>H<sup>0</sup><sub>2</sub> → H<sup>0</sup> H<sup>0</sup>, A<sup>0</sup> → ZH<sup>0</sup></td><td></td></tr></tbody></table>
<table><thead><tr><th></th><th></th><th></th><th></th><th></th><th></th></tr></thead><tbody><tr><td></td><td>31 AALTONEN</td><td>09AR CDF</td><td>p<span style="text-decoration: overline">p</span> → H<sub>0</sub><sup>0</sup><sub>1,2</sub>/A<sup>0</sup> + X,<br> H<sub>0</sub><sup>0</sup><sub>1,2</sub>/A<sup>0</sup> → τ<sup>+</sup>τ<sup>-</sup></td><td></td><td></td></tr><tr><td>none 1–55</td><td>95</td><td></td><td></td><td></td><td></td></tr><tr><td>&gt;110.6</td><td>95</td><td></td><td></td><td></td><td></td></tr><tr><td></td><td>32 ABBIENDI</td><td>05A OPAL</td><td>H<sub>0</sub><sup>0</sup>, Type II model</td><td></td><td></td></tr><tr><td></td><td>33 ABDALLAH</td><td>05D DLPH</td><td>H<sub>0</sub><sup>0</sup> → 2 jets</td><td></td><td></td></tr><tr><td></td><td>34 ABDALLAH</td><td>04D DLPH</td><td>Z → f<span style="text-decoration: overline">T</span>H</td><td></td><td></td></tr><tr><td></td><td>35 ABDALLAH</td><td>04D DLPH</td><td>e<sup>+</sup>e<sup>-</sup> → H<sub>0</sub>Z, H<sub>0</sub>A<sup>0</sup></td><td></td><td></td></tr><tr><td></td><td>36 ABBIENDI</td><td>02D OPAL</td><td>e<sup>+</sup>e<sup>-</sup> → b<span style="text-decoration: overline">b</span>H</td><td></td><td></td></tr><tr><td>none 1–44</td><td>95</td><td></td><td></td><td></td><td></td></tr><tr><td>&gt; 68.0</td><td>95</td><td></td><td></td><td></td><td></td></tr><tr><td></td><td>37 ABBIENDI</td><td>01E OPAL</td><td>H<sub>0</sub><sup>0</sup>, Type-II model</td><td></td><td></td></tr><tr><td></td><td>38 ABBIENDI</td><td>99E OPAL</td><td>tanβ &gt; 1</td><td></td><td></td></tr><tr><td></td><td>39 ABREU</td><td>95H DLPH</td><td>Z → H<sub>0</sub>Z*, H<sub>0</sub>A<sup>0</sup></td><td></td><td></td></tr><tr><td></td><td>40 PICH</td><td>92 RVUE</td><td>Very light Higgs</td><td></td><td></td></tr></tbody></table>

1 AAD 23AD search for associated production of W/ZH<sub>2</sub><sup>0</sup> and gluon fusion production of A<sup>0</sup> decaying to ZH<sub>2</sub><sup>0</sup>, with the decay chain H<sub>0</sub><sup>0</sup> → HH → b<span style="text-decoration: overline">b</span>b<span style="text-decoration: overline">b</span>, using 139 fb<sup>-1</sup> of pp collisions at E<sub>cm</sub> = 13 TeV. See their Figs. 12 and 13 for excluded regions in Type-I and lepton-specific 2HDMs.

2 AAD 23BG search for production of H<sub>0</sub><sup>0</sup>/A<sup>0</sup> in association with a t<span style="text-decoration: overline">t</span> pair, decaying to t<span style="text-decoration: overline">t</span>, using 139 fb<sup>-1</sup> of pp collisions at E<sub>cm</sub> = 13 TeV. See their Fig. 8 for excluded regions in the parameter space of the type II 2HDM.

3 AAD 23O search for production of an A<sup>0</sup> in gluon-gluon fusion and in association with a b<span style="text-decoration: overline">b</span>, decaying to ZH<sub>2</sub><sup>0</sup> → ℓ<sup>+</sup>ℓ<sup>-</sup>b<span style="text-decoration: overline">b</span> or ℓ<sup>+</sup>ℓ<sup>-</sup>W<sup>+</sup>W<sup>-</sup> in 139 fb<sup>-1</sup> of pp collisions at E<sub>cm</sub> = 13 TeV. See their Figs. 12 and 13 for excluded regions in the parameter space in various 2HDMs.

4 AAD 21AF search for production of a heavy H<sub>0</sub><sup>0</sup> state decaying to ZZ in the final states ℓ<sup>+</sup>ℓ<sup>-</sup>ℓ<sup>+</sup>ℓ<sup>-</sup> and ℓ<sup>+</sup>ℓ<sup>-</sup>ν<span style="text-decoration: overline">ν</span> in 139 fb<sup>-1</sup> of pp collisions at E<sub>cm</sub> = 13 TeV. See their Figs. 6 and 7 for excluded parameter regions of the 2HDM Type I and II.

5 AAD 21AI search for production of an A<sup>0</sup> in gluon-gluon fusion and in association with a b<span style="text-decoration: overline">b</span>, decaying to ZH<sub>2</sub><sup>0</sup> → ℓ<sup>+</sup>ℓ<sup>-</sup>b<span style="text-decoration: overline">b</span> or ℓ<sup>+</sup>ℓ<sup>-</sup>W<sup>+</sup>W<sup>-</sup> in 139 fb<sup>-1</sup> of pp collisions at E<sub>cm</sub> = 13 TeV. See their Figs. 10 and 14 for excluded regions in the parameter space of various 2HDMs.

6 AAD 20 combine measurements on H<sub>0</sub><sup>0</sup> production and decay using data taken in years 2015–2017 (up to 79.8 fb<sup>-1</sup>) of pp collisions at E<sub>cm</sub> = 13 TeV. See their Fig. 18 for excluded regions in various 2HDMs.

7 AAD 20L search for b-associated production of H<sub>0</sub><sup>0</sup> decaying to b<span style="text-decoration: overline">b</span> in 27.8 fb<sup>-1</sup> of pp collisions at E<sub>cm</sub> = 13 TeV. See their Figs. 10 and 11 for excluded regions in the flipped two Higgs doublet model.

8 SIRUNYAN 20AA search for H<sub>0</sub><sup>0</sup> → ZA<sup>0</sup>, A<sup>0</sup> → b<span style="text-decoration: overline">b</span> or A<sup>0</sup> → ZH<sub>2</sub><sup>0</sup>, H<sub>0</sub><sup>0</sup> → b<span style="text-decoration: overline">b</span> in 35.9 fb<sup>-1</sup> of pp collisions at E<sub>cm</sub> = 13 TeV. See their Figs. 8 and 9 for excluded regions in the parameter space of Type-II two Higgs doublet model.

9 SIRUNYAN 20Y search for gluon-fusion and vector-boson-fusion production of H<sub>0</sub><sup>0</sup> decaying to W<sup>+</sup>W<sup>-</sup> in the final states ℓ<sup>+</sup>ℓ<sup>-</sup>ℓ<sup>+</sup>ℓ<sup>-</sup> and ℓ<sup>+</sup>ℓ<sup>-</sup>ν<span style="text-decoration: overline">ν</span> in 35.9 fb<sup>-1</sup> of pp collisions at E<sub>cm</sub> = 13 TeV. See their Fig. 7 for excluded regions in Type I and II two Higgs doublet models.

10 SIRUNYAN 19AE search for a pseudoscalar resonance produced in association with a b<span style="text-decoration: overline">b</span> pair, decaying to τ<sup>+</sup>τ<sup>-</sup> in 35.9 fb<sup>-1</sup> of pp collisions at E<sub>cm</sub> = 13 TeV. See their Fig. 4 for cross section limits for m<sub>A<sup>0</sup></sub> = 25–70 GeV and comparison with some representative 2HDMs.

11 SIRUNYAN 19AV search for a scalar resonance produced by gluon fusion or b-associated production, decaying to ZH<sub>0</sub><sup>0</sup> → ℓ<sup>+</sup>ℓ<sup>-</sup>b<span style="text-decoration: overline">b</span> (ℓ = e, µ) or ν<span style="text-decoration: overline">τ</span>b<span style="text-decoration: overline">b</span> in 35.9 fb<sup>-1</sup> of pp collisions at E<sub>cm</sub> = 13 TeV. See their Figs. 6 and 7 for excluded regions in the parameter space of various 2HDMs.

12 AABOUD 18AH search for production of an A<sup>0</sup> in gluon-gluon fusion and in association with a b<span style="text-decoration: overline">b</span>, decaying to ZH<sub>2</sub><sup>0</sup> → ℓ<sup>+</sup>ℓ<sup>-</sup>b<span style="text-decoration: overline">b</span> in 36.1 fb<sup>-1</sup> of pp collisions at E<sub>cm</sub> = 13 TeV. See their Fig. 6 for excluded regions in the parameter space of various 2HDMs.

13 AABOUD 18AI search for production of an A<sup>0</sup> in gluon-gluon fusion and in association with a b<span style="text-decoration: overline">b</span>, decaying to ZH<sub>0</sub><sup>0</sup> in the final states ν<span style="text-decoration: overline">τ</span>b<span style="text-decoration: overline">b</span> and ℓ<sup>+</sup>ℓ<sup>-</sup>b<span style="text-decoration: overline">b</span> in 36.1 fb<sup>-1</sup> of pp collisions at E<sub>cm</sub> = 13 TeV. See their Figs. 7 and 8 for excluded regions in the parameter space in various 2HDMs.

14 AABOUD 18BF search for production of a heavy H<sub>0</sub><sup>0</sup> state decaying to ZZ in the final states ℓ<sup>+</sup>ℓ<sup>-</sup>ℓ<sup>+</sup>ℓ<sup>-</sup> and ℓ<sup>+</sup>ℓ<sup>-</sup>ν<span style="text-decoration: overline">ν</span> in 36.1 fb<sup>-1</sup> of pp collisions at E<sub>cm</sub> = 13 TeV. See their Figs. 8 and 9 for excluded parameter regions in 2HDM Type I and II.

15 AABOUD 18CE search for the process pp → H<sub>0</sub><sup>0</sup>/A<sup>0</sup> t<span style="text-decoration: overline">t</span> followed by the decay H<sub>0</sub><sup>0</sup>/A<sup>0</sup> → t<span style="text-decoration: overline">t</span> in 36.1 fb<sup>-1</sup> of pp collisions at E<sub>cm</sub> = 13 TeV. See their Fig. 12 for limits on cross section times branching ratio, and for lower limits on tanβ for m<sub>H<sub>0</sub><sup>0</sup></sub>, m<sub>A<sup>0</sup></sub> = 0.4–1.0 TeV in the 2HDM type II.

16 HALLER 18 perform global fits in the framework of two-Higgs-doublet models (type I, II, lepton specific, flipped). See their Fig. 8 for allowed parameter regions from fits to LHC H<sub>0</sub><sup>0</sup> measurements, Fig. 9 bottom and charm decays, Fig. 10 muon anomalous magnetic moment, Fig. 11 electroweak precision data, and Fig. 12 by combination of all data.

17 SIRUNYAN 18BP search for production of H<sub>0</sub><sup>0</sup>/A<sup>0</sup> → b<span style="text-decoration: overline">b</span> by b-associated production in 35.7 fb<sup>-1</sup> of pp collisions at E<sub>cm</sub> = 13 TeV. See their Fig. 6 for the limits on cross section times branching ratio for m<sub>H<sub>0</sub><sup>0</sup></sub>, m<sub>A<sup>0</sup></sub> = 0.3–1.3 TeV, and Figs. 8 and 9 for excluded regions in the parameter space of type-II and flipped 2HDMs.

18 SIRUNYAN 18ED search for production of an A<sup>0</sup> in gluon-gluon fusion and in association with a b<span style="text-decoration: overline">b</span>, decaying to ZH<sub>0</sub><sup>0</sup> in the final states ν<span style="text-decoration: overline">τ</span>b<span style="text-decoration: overline">b</span> or ℓ<sup>+</sup>ℓ<sup>-</sup>b<span style="text-decoration: overline">b</span> in 35.9 fb<sup>-1</sup> of pp collisions at E<sub>cm</sub> = 13 TeV. See their Fig. 9 for excluded regions in the parameter space in Type I and II 2HDMs.

19 AABOUD 17AN search for production of a heavy H<sub>0</sub><sup>0</sup> and/or A<sup>0</sup> decaying to t<span style="text-decoration: overline">t</span> in 20.3 fb<sup>-1</sup> of pp collisions at E<sub>cm</sub> = 8 TeV. See their Fig. 3 and Table III for excluded parameter regions in Type II Two-Higgs-Doublet-Models.

20 SIRUNYAN 17AX search for A<sup>0</sup>b<span style="text-decoration: overline">b</span> production followed by the decay A<sup>0</sup> → µ<sup>+</sup>µ<sup>-</sup> in 19.7 fb<sup>-1</sup> of pp collisions at E<sub>cm</sub> = 8 TeV. Limits are set in the range m<sub>A<sup>0</sup></sub> = 25–60 GeV. See their Fig. 5 for upper limits on σ(A<sup>0</sup>b<span style="text-decoration: overline">b</span>)(B<sup>0</sup>A<sup>0</sup> → µ<sup>+</sup>µ<sup>-</sup>).

21 AAD 16AX search for production of a heavy H<sub>0</sub><sup>0</sup> state decaying to ZZ in the final states ℓ<sup>+</sup>ℓ<sup>-</sup>ℓ<sup>+</sup>ℓ<sup>-</sup>, ℓ<sup>+</sup>ℓ<sup>-</sup>ν<span style="text-decoration: overline">ν</span>, ℓ<sup>+</sup>ℓ<sup>-</sup>q<span style="text-decoration: overline">q</span>, and ν<span style="text-decoration: overline">τ</span>q<span style="text-decoration: overline">q</span> in 20.3 fb<sup>-1</sup> of pp collisions at E<sub>cm</sub> = 8 TeV. See their Figs. 13 and 14 for excluded parameter regions in Type I and II models.

22 KHACHATRYAN 16P search for gluon fusion production of an H<sub>0</sub><sup>0</sup> decaying to H<sub>0</sub>H<sub>0</sub> → b<span style="text-decoration: overline">b</span>τ<sup>+</sup>τ<sup>-</sup> and an A<sup>0</sup> decaying to ZH<sub>0</sub><sup>0</sup> → ℓ<sup>+</sup>ℓ<sup>-</sup>τ<sup>+</sup>τ<sup>-</sup> in 19.7 fb<sup>-1</sup> of pp collisions at E<sub>cm</sub> = 8 TeV. See their Fig. 11 for limits on tanβ for m<sub>A<sup>0</sup></sub> = 230–350 GeV.

23 KHACHATRYAN 16W search for A<sup>0</sup>b<span style="text-decoration: overline">b</span> production followed by the decay A<sup>0</sup> → τ<sup>+</sup>τ<sup>-</sup> in 19.7 fb<sup>-1</sup> of pp collisions at E<sub>cm</sub> = 8 TeV. See their Fig. 3 for upper limits on σ(A<sup>0</sup>b<span style="text-decoration: overline">b</span>)(B<sup>0</sup>A<sup>0</sup> → τ<sup>+</sup>τ<sup>-</sup>).

24 KHACHATRYAN 16Z search for H<sub>0</sub><sup>0</sup> → ZA<sup>0</sup> followed by A<sup>0</sup> → b<span style="text-decoration: overline">b</span> or τ<sup>+</sup>τ<sup>-</sup>, and A<sup>0</sup> → ZH<sub>0</sub><sup>0</sup> followed by H<sub>0</sub><sup>0</sup> → b<span style="text-decoration: overline">b</span> or τ<sup>+</sup>τ<sup>-</sup>, in 19.8 fb<sup>-1</sup> of pp collisions at E<sub>cm</sub> = 8 TeV. See their Fig. 4 for cross section limits and Fig. 5 for excluded region in the parameter space.

25 AAD 15BK search for production of a heavy H<sub>0</sub><sup>0</sup> decaying to H<sub>0</sub>H<sub>0</sub> in the final state b<span style="text-decoration: overline">b</span>b<span style="text-decoration: overline">b</span> in 19.5 fb<sup>-1</sup> of pp collisions at E<sub>cm</sub> = 8 TeV. See their Figs. 15–18 for excluded regions in the parameter space.

26 AAD 15S search for production of A<sup>0</sup> decaying to ZH<sub>0</sub><sup>0</sup> → ℓ<sup>+</sup>ℓ<sup>-</sup>b<span style="text-decoration: overline">b</span>, ν<span style="text-decoration: overline">τ</span>b<span style="text-decoration: overline">b</span> and ℓ<sup>+</sup>ℓ<sup>-</sup>τ<sup>+</sup>τ<sup>-</sup> in 20.3 fb<sup>-1</sup> of pp collisions at E<sub>cm</sub> = 8 TeV. See their Figs. 4 and 5 for excluded regions in the parameter space.

27 KHACHATRYAN 15BB search for H<sub>0</sub><sup>0</sup>, A<sup>0</sup> → γγ in 19.7 fb<sup>-1</sup> of pp collisions at E<sub>cm</sub> = 8 TeV. See their Fig. 10 for excluded regions in the two-Higgs-doublet model parameter space.

28 KHACHATRYAN 15N search for production of A<sup>0</sup> decaying to ZH<sub>0</sub><sup>0</sup> → ℓ<sup>+</sup>ℓ<sup>-</sup>b<span style="text-decoration: overline">b</span> in 19.7 fb<sup>-1</sup> of pp collisions at E<sub>cm</sub> = 8 TeV. See their Fig. 5 for excluded regions in the tanβ - cos(β - α) plane for m<sub>A<sup>0</sup></sub> = 300 GeV.

29 AAD 14M search for the decay cascade H<sub>0</sub><sup>0</sup> → H<sub>0</sub>W<sup>+</sup>W<sup>-</sup>, H<sub>0</sub> decaying to b<span style="text-decoration: overline">b</span> in 20.3 fb<sup>-1</sup> of pp collisions at E<sub>cm</sub> = 8 TeV. See their Table IV for limits in a two-Higgs-doublet model for m<sub>H<sub>0</sub><sup>0</sup></sub> = 325–1025 GeV and m<sub>H<sub>0</sub><sup>+</sup></sub> = 225–825 GeV.

30 KHACHATRYAN 14Q search for H<sub>0</sub><sup>0</sup> → H<sub>0</sub>H<sub>0</sub> and A<sup>0</sup> → ZH<sub>0</sub><sup>0</sup> in 19.5 fb<sup>-1</sup> of pp collisions at E<sub>cm</sub> = 8 TeV. See their Figs. 4 and 5 for limits on cross section times branching ratio for m<sub>H<sub>2</sub>,A<sup>0</sup></sub> = 260–360 GeV and their Figs. 7–9 for limits in two-Higgs-doublet models.

31 AALTONEN 09AR search for Higgs bosons decaying to τ<sup>+</sup>τ<sup>-</sup> in two doublet models in 1.8 fb<sup>-1</sup> of p<span style="text-decoration: overline">p</span> collisions at E<sub>cm</sub> = 1.96 TeV. See their Fig. 2 for the limit on σ · B(H<sub>0</sub><sup>0</sup><sub>1,2</sub>/A<sup>0</sup> → τ<sup>+</sup>τ<sup>-</sup>) for different Higgs masses, and see their Fig. 3 for the excluded region in the MSSM parameter space.

32 ABBIENDI 05A search for e<sup>+</sup>e<sup>-</sup> → H<sub>0</sub>A<sup>0</sup> in general Type-II doublet models, with decays H<sub>0</sub><sup>0</sup>, A<sup>0</sup> → q<span style="text-decoration: overline">q</span>, g<span style="text-decoration: overline">g</span>, τ<sup>+</sup>τ<sup>-</sup>, and H<sub>0</sub><sup>0</sup> → A<sup>0</sup>A<sup>0</sup>.

33 ABDALLAH 05D search for e<sup>+</sup>e<sup>-</sup> → H<sub>0</sub>Z and H<sub>0</sub>A<sup>0</sup> with H<sub>0</sub><sup>0</sup>, A<sup>0</sup> decaying to two jets of any flavor including g<span style="text-decoration: overline">g</span>. The limit is for SM H<sub>0</sub>Z production cross section with B(H<sub>0</sub><sup>0</sup> → jj) = 1.

34 ABDALLAH 04O search for Z → b<span style="text-decoration: overline">b</span>H<sub>0</sub>, b<span style="text-decoration: overline">b</span>A<sup>0</sup>, τ<sup>+</sup>τ<sup>-</sup> H<sub>0</sub> and τ<sup>+</sup>τ<sup>-</sup> A<sup>0</sup> in the final states 4b, b<span style="text-decoration: overline">b</span>τ<sup>+</sup>τ<sup>-</sup>, and 4τ. See paper for limits on Yukawa couplings.

35 ABDALLAH 04O search for e<sup>+</sup>e<sup>-</sup> → H<sub>0</sub>Z and H<sub>0</sub>A<sup>0</sup>, with H<sub>0</sub><sup>0</sup>, A<sup>0</sup> decaying to b<span style="text-decoration: overline">b</span>, τ<sup>+</sup>τ<sup>-</sup>, or H<sub>0</sub><sup>0</sup> → A<sup>0</sup>A<sup>0</sup> at E<sub>cm</sub> = 189–208 GeV. See paper for limits on couplings.

36 ABBIENDI 02D search for Z → b<span style="text-decoration: overline">b</span>H<sub>0</sub><sup>0</sup> and b<span style="text-decoration: overline">b</span>A<sup>0</sup> with H<sub>0</sub><sup>0</sup>/A<sup>0</sup> → τ<sup>+</sup>τ<sup>-</sup>, in the range 4&lt;m<sub>H</sub>&lt;12 GeV. See their Fig. 8 for limits on the Yukawa coupling.

37 ABBIENDI 01E search for neutral Higgs bosons in general Type-II doublet models, at E<sub>cm</sub> ≤ 189 GeV. In addition to usual final states, the decays H<sub>0</sub><sup>0</sup>, A<sup>0</sup> → q<span style="text-decoration: overline">q</span>, g<span style="text-decoration: overline">g</span> are searched for. See their Figs. 15,16 for excluded regions.

38 ABBIENDI 99E search for e<sup>+</sup>e<sup>-</sup> → H<sub>0</sub>A<sup>0</sup> and H<sub>0</sub>Z at E<sub>cm</sub> = 183 GeV. The limit is with m<sub>H<sub>0</sub>-m<sub>A</sub></sub> in general two Higgs-doublet models. See their Fig. 18 for the exclusion limit in the m<sub>H<sub>0</sub>-m<sub>A</sub></sub> plane. Updates the results of ACKERSTAFF 98s.

39 See Fig. 4 of ABREU 95H for the excluded region in the m<sub>H<sub>0</sub></sub> - m<sub>A<sup>0</sup></sub> plane for general two-doublet models. For tanβ >1, the region m<sub>H<sub>0</sub>+m<sub>A</sub></sub> ~ 87 GeV, m<sub>H<sub>0</sub></sub> < 47 GeV is excluded at 95% CL.

40 PICH 92 analyse H<sub>0</sub><sup>0</sup> with m<sub>H<sub>0</sub></sub> < 2m<sub>μ</sub> in general two-doublet models. Excluded regions in the space of mass-mixing angles from LEP, beam dump, and π<sup>±</sup>, η rare decays are shown in Figs. 3,4. The considered mass region is not totally excluded.

## Mass Limits for H<sup>0</sup> with Vanishing Yukawa Couplings

These limits assume that H<sub>0</sub> couples to gauge bosons with the same strength as the Standard Model Higgs boson, but has no coupling to quarks and leptons (this is often referred to as "fermiphotic").

<table><thead><tr><th>VALUE (GeV)</th><th>CL%</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td></td><td></td><td>1 AALTONEN</td><td>13K CDF</td><td>H<sub>0</sub> → W W<sup>(+)</sup></td></tr><tr><td></td><td></td><td>2 AALTONEN</td><td>13L CDF</td><td>H<sub>0</sub> → γγ, W W<sup>(+)</sup>, Z Z<sup>(+)</sup></td></tr><tr><td></td><td></td><td>3 AALTONEN</td><td>13M TEVA</td><td>H<sub>0</sub> → γγ, W W<sup>(+)</sup>, Z Z<sup>(+)</sup></td></tr><tr><td></td><td></td><td>4 ABAZOV</td><td>13G D0</td><td>H<sub>0</sub> → W W<sup>(+)</sup></td></tr><tr><td></td><td></td><td>5 ABAZOV</td><td>13H D0</td><td>H<sub>0</sub> → γγ</td></tr><tr><td></td><td></td><td>6 ABAZOV</td><td>13I D0</td><td>H<sub>0</sub> → W W<sup>(+)</sup></td></tr><tr><td></td><td></td><td>7 ABAZOV</td><td>13J D0</td><td>H<sub>0</sub> → W W<sup>(+)</sup>, Z Z<sup>(+)</sup></td></tr><tr><td></td><td></td><td>8 ABAZOV</td><td>13L D0</td><td>H<sub>0</sub> → γγ, W W<sup>(+)</sup>, Z Z<sup>(+)</sup></td></tr><tr><td></td><td></td><td>9 CHATRCHYAN</td><td>13AL CMS</td><td>H<sub>0</sub> → γγ</td></tr><tr><td></td><td></td><td>10 AAD</td><td>12N ATLS</td><td>H<sub>0</sub> → γγ</td></tr><tr><td></td><td></td><td>11 AALTONEN</td><td>12AN CDF</td><td>H<sub>0</sub> → γγ</td></tr><tr><td></td><td></td><td>12 CHATRCHYAN</td><td>12A0 CMS</td><td>H<sub>0</sub> → γγ, W W<sup>(+)</sup>, Z Z<sup>(+)</sup></td></tr><tr><td></td><td></td><td>13 AALTONEN</td><td>09AB CDF</td><td>H<sub>0</sub> → γγ</td></tr><tr><td></td><td></td><td>14 ABAZOV</td><td>08U D0</td><td>H<sub>0</sub> → γγ</td></tr><tr><td></td><td></td><td>15 SCHAEL</td><td>07 ALEP</td><td>e<sup>+</sup>e<sup>-</sup> → H<sub>0</sub>Z, H<sub>0</sub> → W W<sup>(+)</sup></td></tr><tr><td></td><td></td><td>16,17 ABDALLAH</td><td>04L DLPH</td><td>e<sup>+</sup>e<sup>-</sup> → H<sub>0</sub>Z, H<sub>0</sub> → γγ</td></tr><tr><td></td><td></td><td>18 ACHARD</td><td>03C L3</td><td>H<sub>0</sub> → W W<sup>(+)</sup>, Z Z<sup>(+)</sup>, γγ</td></tr></tbody></table>
<table><tr><td>&gt;105.4</td><td>95</td><td>16,19</td><td>ABBIENDI</td><td>02F</td><td>OPAL</td><td>H<sup>0</sup> → γγ</td></tr><tr><td>&gt;105.4</td><td>95</td><td>20</td><td>ACARD</td><td>02C</td><td>L3</td><td>H<sup>0</sup> → γγ</td></tr><tr><td>none 60–82</td><td>95</td><td>21</td><td>AFFOLDER</td><td>01H</td><td>CDF</td><td>p<span style="text-decoration: overline">p</span> → H<sup>0</sup>W/Z, H<sup>0</sup> → γγ</td></tr><tr><td>&gt; 94.9</td><td>95</td><td>22</td><td>ACCIARRI</td><td>00S</td><td>L3</td><td>e<sup>+</sup> e<sup>−</sup> → H<sup>0</sup>Z, H<sup>0</sup> → γγ</td></tr><tr><td>&gt; 100.7</td><td>95</td><td>23</td><td>BARATE</td><td>00L</td><td>Alep</td><td>e<sup>+</sup> e<sup>−</sup> → H<sup>0</sup>Z, H<sup>0</sup> → γγ</td></tr><tr><td>&gt; 96.2</td><td>95</td><td>24</td><td>ABBIENDI</td><td>99F</td><td>OPAL</td><td>e<sup>+</sup> e<sup>−</sup> → H<sup>0</sup>Z, H<sup>0</sup> → γγ</td></tr><tr><td>&gt; 78.5</td><td>95</td><td>25</td><td>ABBOTT</td><td>99B</td><td>D0</td><td>p<span style="text-decoration: overline">p</span> → H<sup>0</sup>W/Z, H<sup>0</sup> → γγ</td></tr><tr><td></td><td></td><td>26</td><td>ABREU</td><td>99P</td><td>DLPH</td><td>e<sup>+</sup> e<sup>−</sup> → H<sup>0</sup>γ and/or H<sup>0</sup> → γγ</td></tr></table>

1 AALTONEN 13k search for $H^0 \to WW^(*)$ in 9.7 fb$^{-1}$ of $p\bar{p}$ collisions at $E_{cm} = 1.96$ TeV. A limit on cross section times branching ratio which corresponds to (1.3–6.6) times the expected cross section is given in the range $m_{H^0} = 110-200$ GeV at 95% CL.

2 AALTONEN 13L combine all CDF searches with 9.45–10.0 fb$^{-1}$ of $p\bar{p}$ collisions at $E_{cm} = 1.96$ TeV.

3 AALTONEN 13M combine all Tevatron data from the CDF and D0 Collaborations of $p\bar{p}$ collisions at $E_{cm} = 1.96$ TeV.

4 ABAZOV 13G search for $H^0 \to WW^(*)$ in 9.7 fb$^{-1}$ of $p\bar{p}$ collisions at $E_{cm} = 1.96$ TeV. A limit on cross section times branching ratio which corresponds to (2–9) times the expected cross section is given for $m_{H^0} = 100-200$ GeV at 95% CL.

5 ABAZOV 13H search for $H^0 \to \gamma\gamma$ in 9.6 fb$^{-1}$ of $p\bar{p}$ collisions at $E_{cm} = 1.96$ TeV.

6 ABAZOV 13I search for $H^0$ production in the final state with one lepton and two or more jets plus missing $E_T$ in 9.7 fb$^{-1}$ of $p\bar{p}$ collisions at $E_{cm} = 1.96$ TeV. The search is sensitive to $W H^0$, $Z H^0$ and vector-boson fusion production with $H^0 \to WW^(*)$. A limit on cross section times branching ratio which corresponds to (8–30) times the expected cross section is given in the range $m_{H^0} = 100-200$ GeV at 95% CL.

7 ABAZOV 13J search for $H^0$ production in the final states $e\mu e\mu$, $e\mu\mu\tau\tau$, and $e^\pm\mu^\pm$ in 8.6–9.7 fb$^{-1}$ of $p\bar{p}$ collisions at $E_{cm} = 1.96$ TeV. The search is sensitive to $W H^0$, $Z H^0$ production with $H^0 \to WW^(*)$, $ZZ^(*)$, decaying to leptonic final states. A limit on cross section times branching ratio which corresponds to (2.4–13.0) times the expected cross section is given in the range $m_{H^0} = 100-200$ GeV at 95% CL.

8 ABAZOV 13L combine all D0 results with up to 9.7 fb$^{-1}$ of $p\bar{p}$ collisions at $E_{cm} = 1.96$ TeV.

9 CHATRCHYAN 13AL search for $H^0 \to \gamma\gamma$ in 5.1 fb$^{-1}$ and 5.3 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 7$ and 8 TeV.

10 AAD 12n search for $H^0 \to \gamma\gamma$ with 4.9 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 7$ TeV in the mass range $m_{H^0} = 110-150$ GeV.

11 AALTONEN 12AN search for $H^0 \to \gamma\gamma$ with 10 fb$^{-1}$ of $p\bar{p}$ collisions at $E_{cm} = 1.96$ TeV in the mass range $m_{H^0} = 100-150$ GeV.

12 CHATRCHYAN 12A0 use data from CHATRCHYAN 12G, CHATRCHYAN 12E, CHATRCHYAN 12H, CHATRCHYAN 12I, CHATRCHYAN 12D, and CHATRCHYAN 12C.

13 AALTONEN 09AB search for $H^0 \to \gamma\gamma$ in 3.0 fb$^{-1}$ of $p\bar{p}$ collisions at $E_{cm} = 1.96$ TeV in the mass range $m_{H^0} = 70-150$ GeV. Associated $H^0W$, $H^0Z$ production and $WW$, $ZZ$ fusion are considered.

14 ABAZOV 08U search for $H^0 \to \gamma\gamma$ in $p\bar{p}$ collisions at $E_{cm} = 1.96$ TeV in the mass range $m_{H^0} = 70-150$ GeV. Associated $H^0W$, $H^0Z$ production and $WW$, $ZZ$ fusion are considered. See their Tab. 1 for the limit on $\sigma \cdot B(H^0 \to \gamma\gamma)$, and see their Fig. 3 for the excluded region in the $m_{H^0} - B(H^0 \to \gamma\gamma)$ plane.

15 SCHAEL 07 search for Higgs bosons in association with a fermion pair and decaying to $WW^*$. The limit is from this search and HEISTER 02L for a $H^0$ with SM production cross section.

16 Search for associated production of a $\gamma\gamma$ resonance with a Z boson, followed by $Z \to q\bar{q}$, $\ell^+\ell^-$, or $\nu\bar{\nu}$, at $E_{cm} \le 209$ GeV. The limit is for a $H^0$ with SM production cross section. For $B(H^0 \to WW^*) + B(H^0 \to ZZ^*) = 1$, $m_{H^0} > 108.1$ GeV is obtained. See fig. 6 for the limits under different BR assumptions.

17 Updates ABREU 01F.

18 ACHARD 03c search for $e^+ e^- \to Z H^0$ followed by $H^0 \to WW^*$ or $ZZ^*$ at $E_{cm} = 200-29$ GeV and combine with the ACHARD 02c result. The limit is for a $H^0$ with SM production cross section. For $B(H^0 \to WW^*) + B(H^0 \to ZZ^*) = 1$, $m_{H^0} > 108.1$ GeV is obtained.

19 For $B(H^0 \to \gamma\gamma) = 1$, $m_{H^0} > 117$ GeV is obtained.

20 ACHARD 02c search for associated production of a $\gamma\gamma$ resonance with a Z boson, followed by $Z \to q\bar{q}$, $\ell^+\ell^-$, or $\nu\bar{\nu}$, at $E_{cm} \le 209$ GeV. The limit is for a $H^0$ with SM production cross section. For $B(H^0 \to \gamma\gamma) = 1$, $m_{H^0} > 114$ GeV is obtained.

21 AFFOLDER 01H search for associated production of a $\gamma\gamma$ resonance and a W or Z (tagged by two jets, an isolated lepton, or missing $E_T$). The limit assumes Standard Model values for the production cross section and for the couplings of the $H^0$ to W and Z bosons. See their Fig. 11 for limits with $B(H^0 \to \gamma\gamma) < 1$.

22 ACCIARRI 00S search for associated production of a $\gamma\gamma$ resonance with a $q\bar{q}$, $\nu\bar{\nu}$, or $\ell^+\ell^-$ pair in $e^+ e^-$ collisions at $E_{cm} = 189$ GeV. The limit is for a $H^0$ with SM production cross section. For $B(H^0 \to \gamma\gamma) = 1$, $m_{H^0} > 98$ GeV is obtained. See their Fig. 5 for limits on $B(H \to \gamma\gamma) \cdot \sigma(e^+ e^- \to H\bar{f}/\sigma(e^+ e^- \to H\bar{f})$.

23 BARATE 00L search for associated production of a $\gamma\gamma$ resonance with a $q\bar{q}$, $\nu\bar{\nu}$, or $\ell^+\ell^-$ pair in $e^+ e^-$ collisions at $E_{cm} = 88-202$ GeV. The limit is for a $H^0$ with SM production cross section. For $B(H^0 \to \gamma\gamma) = 1$, $m_{H^0} > 109$ GeV is obtained. See their Fig. 3 for limits on $B(H \to \gamma\gamma) \cdot \sigma(e^+ e^- \to H\bar{f}/\sigma(e^+ e^- \to H\bar{f})$.

24 ABBIENDI 99o search for associated production of a $\gamma\gamma$ resonance with a $q\bar{q}$, $\nu\bar{\nu}$, or $\ell^+\ell^-$ pair in $e^+ e^-$ collisions at 189 GeV. The limit is for a $H^0$ with SM production cross section. See their Fig. 4 for limits on $\sigma(e^+ e^- \to H^0 Z^0) \times B(H^0 \to \gamma\gamma) \times B(X^0 \to f\bar{f})$ for various masses. Updates the results of ACKERSTAFF 98y.

25 ABBOTT 99b search for associated production of a $\gamma\gamma$ resonance and a dijet pair. The limit assumes Standard Model values for the production cross section and for the couplings of the $H^0$ to W and Z bosons. Limits in the range of $\sigma(H^0 + Z/W) \cdot B(H^0 \to \gamma\gamma) = 0.80-0.34$ pb are obtained in the mass range $m_{H^0} = 65-150$ GeV.

26 ABREU 99p search for $e^+ e^- \to H^0\gamma$ with $H^0 \to b\bar{b}$ or $\gamma\gamma$, and $e^+ e^- \to H^0 q\bar{q}$ with $H^0 \to \gamma\gamma$. See their Fig. 4 for limits on $\sigma \times B$. Explicit limits within an effective interaction framework are also given.

Mass Limits for $H^0$ Decaying to Invisible Final States

These limits are for a neutral scalar $H^0$ which predominantly decays to invisible final states. Standard Model values are assumed for the couplings of $H^0$ to ordinary particles unless otherwise stated.

<table><thead><tr><th>VALUE (GeV)</th><th>CL%</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>&gt;108.2</td><td>95</td><td>1 AABOUD</td><td>19AI ATLS</td><td>WW/ZZ fusion</td></tr><tr><td></td><td></td><td>2 AAD</td><td>15BD ATLS</td><td>p<span style="text-decoration: overline">p</span> → H<sup>0</sup>W X, H<sup>0</sup>ZX</td></tr><tr><td></td><td></td><td>3 AAD</td><td>15BH ATLS</td><td>jet + missing E<sub>T</sub></td></tr><tr><td></td><td></td><td>4 AAD</td><td>14BA ATLS</td><td>secondary vertex</td></tr><tr><td></td><td></td><td>5 AAD</td><td>14O ATLS</td><td>p<span style="text-decoration: overline">p</span> → H<sup>0</sup>ZX</td></tr><tr><td></td><td></td><td>6 CHATRCHYAN</td><td>14B CMS</td><td>p<span style="text-decoration: overline">p</span> → H<sup>0</sup>ZX, qqH<sup>0</sup>X</td></tr><tr><td></td><td></td><td>7 AAD</td><td>13AG ATLS</td><td>secondary vertex</td></tr><tr><td></td><td></td><td>8 AAD</td><td>13AT ATLS</td><td>electron jets</td></tr><tr><td></td><td></td><td>9 CHATRCHYAN</td><td>13BJ CMS</td><td></td></tr><tr><td></td><td></td><td>10 AAD</td><td>12AQ ATLS</td><td>secondary vertex</td></tr><tr><td></td><td></td><td>11 AALTONEN</td><td>12AB CDF</td><td>secondary vertex</td></tr><tr><td></td><td></td><td>12 AALTONEN</td><td>12U CDF</td><td>secondary vertex</td></tr><tr><td></td><td></td><td>13 ABBIENDI</td><td>10 OPAL</td><td></td></tr><tr><td></td><td></td><td>14 ABBIENDI</td><td>07 OPAL</td><td>large width</td></tr><tr><td>&gt;112.3</td><td>95</td><td>15 ACHARD</td><td>05 L3</td><td></td></tr><tr><td></td><td></td><td>15 ABDALLAH</td><td>04B DLPH</td><td></td></tr><tr><td>&gt;114.1</td><td>95</td><td>15 HEISTER</td><td>02 AEP</td><td>E<sub>cm</sub> ≤ 209 GeV</td></tr><tr><td>&gt;106.4</td><td>95</td><td>15 BARATE</td><td>01C AEP</td><td>E<sub>cm</sub> ≤ 202 GeV</td></tr><tr><td>&gt;89.2</td><td>95</td><td>16 ACCIARRI</td><td>00M L3</td><td></td></tr></tbody></table>

1 AABOUD 19AI search for $H^0_{1,2}$ production by vector boson fusion and decay to invisible final states in 36.1 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. See their Fig. 6(b) for limits on cross section times branching ratios for $m_{H^0} = 0.1-3$ TeV.

2 AAD 15BD search for $p\bar{p} \to H^0W X$ and $p\bar{p} \to H^0ZX$ with W or Z decaying hadronically and $H^0$ decaying to invisible final states in 20.3 fb$^{-1}$ at $E_{cm} = 8$ TeV. See their Fig. 6 for a limit on the cross section times branching ratio for $m_{H^0} = 115-300$ GeV.

3 AAD 15BH search for events with a jet and missing $E_T$ in 20.3 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 8$ TeV. Limits on $\sigma(H^0) B(H^0 \to invisible) < (44-10)$ pb (95%CL) is given for $m_{H^0} = 115-300$ GeV.

4 AAD 14BA search for $H^0$ production in the decay mode $H^0 \to X^0X^0$, where $X^0$ is a long-lived particle which decays to collimated pairs of $e^+ e^-$, $\mu^+ \mu^-$, or $\pi^+ \pi^-$ plus invisible particles, in 20.3 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 8$ TeV. See their Figs. 15 and 16 for limits on cross section times branching ratio.

5 AAD 14O search for $p\bar{p} \to H^0ZX$, $Z \to \ell\ell$, with $H^0$ decaying to invisible final states in 4.5 fb$^{-1}$ at $E_{cm} = 7$ TeV and 20.3 fb$^{-1}$ at $E_{cm} = 8$ TeV. See their Fig. 3 for a limit on the cross section times branching ratio for $m_{H^0} = 110-400$ GeV.

6 CHATRCHYAN 14B search for $p\bar{p} \to H^0ZX$, $Z \to \ell\ell$ and $Z \to b\bar{b}$, and also $p\bar{p} \to q\bar{q}H^0$ X with $H^0$ decaying to invisible final states using data at $E_{cm} = 7$ and 8 TeV. See their Figs. 10, 11 for limits on the cross section times branching ratio for $m_{H^0} = 100-400$ GeV.

7 AAD 13AG search for $H^0$ production in the decay mode $H^0 \to X^0X^0$, where $X^0$ is a long-lived particle which decays to $\mu^+ \mu^- X^0$, in 1.9 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 7$ TeV. See their Fig. 7 for limits on cross section times branching ratio.

8 AAD 13AT search for $H^0$ production in the decay mode $H^0 \to X^0X^0$, where $X^0$ eventually decays to clusters of collimated $e^+ e^-$ pairs, in 2.04 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 7$ TeV. See their Fig. 3 for limits on cross section times branching ratio.

9 CHATRCHYAN 13BJ search for $H^0$ production in the decay chain $H^0 \to X^0X^0$, $X^0 \to \mu^+ \mu^- X^0$ in 5.3 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 7$ TeV. See their Fig. 2 for limits on cross section times branching ratio.

10 AAD 12AQ search for $H^0$ production in the decay mode $H^0 \to X^0X^0$, where $X^0$ is a long-lived particle which decays mainly to $b\bar{b}$ in the muon detector, in 1.94 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 7$ TeV. See their Fig. 3 for limits on cross section times branching ratio for $m_{H^0} = 120, 140$ GeV, $m_{X^0} = 20, 40$ GeV in the $c\tau$ range of 0.5–35 m.

11 AALTONEN 12AB search for $H^0$ production in the decay $H^0 \to X^0X^0$, where $X^0$ eventually decays to clusters of collimated $\ell^+\ell^- \ell^+\ell^-$ pairs, in 5.1 fb$^{-1}$ of $p\bar{p}$ collisions at $E_{cm} = 1.96$ TeV. Cross section limits are provided for a benchmark MSSM model incorporating the parameters given in Table VI.

12 AALTONEN 12U search for $H^0$ production in the decay mode $H^0 \to X^0X^0$, where $X^0$ is a long-lived particle with $c\tau \approx 1$ cm which decays mainly to $b\bar{b}$, in 3.2 fb$^{-1}$ of $p\bar{p}$ collisions at $E_{cm} = 1.96$ TeV. See their Figs. 9 and 10 for limits on cross section times branching ratio for $m_{H^0} = (130-170)$ GeV, $m_{X^0} = 20, 40$ GeV.

13 ABBIENDI 10 search for $e^+ e^- \to H^0Z$ with $H^0$ decaying invisibly. The limit assumes SM production cross section and $B(H^0 \to invisible) = 1$.

14 ABBIENDI 07 search for $e^+ e^- \to H^0Z$ with $Z \to q\bar{q}$ and $H^0$ decaying to invisible final states. The $H^0$ width is varied between 1 GeV and 3 TeV. A limit $\sigma \cdot B(H^0 \to invisible) < (0.07-0.57)$ pb (95%CL) is obtained at $E_{cm} = 206$ GeV for $m_{H^0} = 60-114$ GeV.

15 Search for $e^+ e^- \to H^0Z$ with $H^0$ decaying invisibly. The limit assumes SM production cross section and $B(H^0 \to invisible) = 1$.

16 ACCIARRI 00M search for $e^+ e^- \to ZH^0$ with $H^0$ decaying invisibly at $E_{cm} = 183-189$ GeV. The limit assumes SM production cross section and $B(H^0 \to invisible) = 1$. See their Fig. 6 for limits for smaller branching ratios.

Mass Limits for Light $A^0$

These limits are for a pseudoscalar $A^0$ in the mass range below $\mathcal{O}(10)$ GeV.

<table><thead><tr><th>VALUE (GeV)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>• • •</td><td></td><td></td><td>We do not use the following data for averages, limits, etc. • • •</td></tr></tbody></table>

1 ADACHI 23A BEL2 $\tau \to eA^0$, $\tau \to \mu A^0$

2 TUMASYAN 23AR CMS $H \to A^0A^0 \to 4\gamma$

3 ABLIKIM 22H BES3 $J/\psi \to A^0\gamma$
<table><tr><td>4</td><td>JIA</td><td>22</td><td>BELL</td><td>T(15) → A<sup>0</sup>γ</td></tr><tr><td>5</td><td>AAD</td><td>20AE</td><td>ATLS</td><td>H<sup>0</sup> → ZA<sup>0</sup></td></tr><tr><td>6</td><td>ABAOUD</td><td>18AP</td><td>ATLS</td><td>H<sup>0</sup> → A<sup>0</sup>A<sup>0</sup></td></tr><tr><td>7</td><td>KHACHATRY...</td><td>17AZ</td><td>CMS</td><td>H<sup>0</sup> → A<sup>0</sup>A<sup>0</sup></td></tr><tr><td>8</td><td>ABLIKIM</td><td>16E</td><td>BES3</td><td>J/ψ → A<sup>0</sup>γ</td></tr><tr><td>9</td><td>KHACHATRY...</td><td>16F</td><td>CMS</td><td>H<sup>0</sup> → A<sup>0</sup>A<sup>0</sup></td></tr><tr><td>10</td><td>LEES</td><td>15H</td><td>BABR</td><td>T(15) → A<sup>0</sup>γ</td></tr><tr><td>11</td><td>LEES</td><td>13C</td><td>BABR</td><td>T(15) → A<sup>0</sup>γ</td></tr><tr><td>12</td><td>LEES</td><td>13L</td><td>BABR</td><td>T(15) → A<sup>0</sup>γ</td></tr><tr><td>13</td><td>LEES</td><td>13R</td><td>BABR</td><td>T(15) → A<sup>0</sup>γ</td></tr><tr><td>14</td><td>ABLIKIM</td><td>12</td><td>BES3</td><td>J/ψ → A<sup>0</sup>γ</td></tr><tr><td>15</td><td>CHATRCHYAN</td><td>12V</td><td>CMS</td><td>A<sup>0</sup> → μ<sup>+</sup>μ<sup>-</sup></td></tr><tr><td>16</td><td>AAALTONEN</td><td>11P</td><td>CDF</td><td>t → bH<sup>+</sup>, H<sup>+</sup> → W<sup>+</sup>A<sup>0</sup></td></tr><tr><td>17,18</td><td>ABOUZAID</td><td>11A</td><td>KTEV</td><td>K<sub>L</sub> → π<sup>0</sup>π<sup>0</sup>A<sup>0</sup>, A<sup>0</sup> → μ<sup>+</sup>μ<sup>-</sup></td></tr><tr><td>19</td><td>DEL-AMO-SA...</td><td>11J</td><td>BABR</td><td>T(15) → A<sup>0</sup>γ</td></tr><tr><td>20</td><td>LEES</td><td>11H</td><td>BABR</td><td>T(2S,3S) → A<sup>0</sup>γ</td></tr><tr><td>21</td><td>ANDREAS</td><td>10</td><td>RVUE</td><td></td></tr><tr><td>18,22</td><td>HYUN</td><td>10</td><td>BELL</td><td>B<sup>0</sup> → K<sup>*</sup>0A<sup>0</sup>, A<sup>0</sup> → μ<sup>+</sup>μ<sup>-</sup></td></tr><tr><td>18,23</td><td>HYUN</td><td>10</td><td>BELL</td><td>B<sup>0</sup> → ρ<sup>0</sup>A<sup>0</sup>, A<sup>0</sup> → μ<sup>+</sup>μ<sup>-</sup></td></tr><tr><td>24</td><td>AUBERT</td><td>09P</td><td>BABR</td><td>T(3S) → A<sup>0</sup>γ</td></tr><tr><td>25</td><td>AUBERT</td><td>09Z</td><td>BABR</td><td>T(2S) → A<sup>0</sup>γ</td></tr><tr><td>26</td><td>AUBERT</td><td>09Z</td><td>BABR</td><td>T(3S) → A<sup>0</sup>γ</td></tr><tr><td>18,27</td><td>TUNG</td><td>09</td><td>K391</td><td>K<sub>L</sub> → π<sup>0</sup>π<sup>0</sup>A<sup>0</sup>, A<sup>0</sup> → γγ</td></tr><tr><td>28</td><td>LOVE</td><td>08</td><td>CLEO</td><td>T(15) → A<sup>0</sup>γ</td></tr><tr><td>29</td><td>BESSON</td><td>07</td><td>CLEO</td><td>T(15) → η<sub>b</sub>γ</td></tr><tr><td>30</td><td>PARK</td><td>05</td><td>HYCP</td><td>Σ<sup>+</sup> → pA<sup>0</sup>, A<sup>0</sup> → μ<sup>+</sup>μ<sup>-</sup></td></tr><tr><td>31</td><td>BALEST</td><td>95</td><td>CLEO</td><td>T(15) → A<sup>0</sup>γ</td></tr><tr><td>32</td><td>ANTREASYAN</td><td>90C</td><td>CBAL</td><td>T(15) → A<sup>0</sup>γ</td></tr></table>

1. ADACHI 23A search for flavor-changing τ decays to eA0 and τ → µA0, with A0 invisible, using 62.8 fb⁻¹ of e⁺e⁻ collisions at $E_{cm} = 10.58$ GeV. Limits on $B(τ → eA0)/B(τ → eνν)$ in the range $1.1 × 10^{-3}-9.7 × 10^{-3}$ (95% CL) and $B(τ → µA0)/B(τ → µνν)$ in the range $0.7 × 10^{-3}-12.2 × 10^{-3}$ (95% CL) are given for $m_{A0} = 0-1.6$ GeV. See their Fig. 2.

2. TUMASYAN 23AR search for the decay $H → A0A0$ with $A0 → γγ$ (detected as a merged photonlike object) using 136 fb⁻¹ of pp collisions at $E_{cm} = 13$ TeV. Limits on $B(H → A0A0)·B(A0 → γγ)$ in the range $0.9 × 10^{-3}-3.3 × 10^{-3}$ (95% CL) are given for $m_{A0} = 0.1-1.2$ GeV. See their Fig. 2.

3. ABLIKIM 22H search for the process $J/ψ → A0γ$ with $A0$ decaying to $μ^+μ^-$ in $9 × 10^9$ J/ψ events and give limits on $B(J/ψ → A0γ)·B(A0 → μ^+μ^-)$ in the range $1.2 × 10^{-9}-7.78 × 10^{-7}$ (90% CL) for 0.212 GeV $≤ m_{A0} ≤ 3.0$ GeV. See their Fig. 4.

4. JIA 22 search for the process $T(2S) → T(1S)π^+π^- → A0γπ^+π^-$ with $A0$ decaying to $τ^+τ^-$ or $μ^+μ^-$ in $158 × 10^6$ $T(2S)$ events and give limits on $B(T(1S) → A0)·B(A0 → τ^+τ^-)$ in the range $3.8 × 10^{-6}-1.5 × 10^{-4}$ (90% CL) for $m_{A0} = 3.6-9.2$ GeV, and $B(T(1S) → A0γ)·B(A0 → μ^+μ^-)$ in the range $3.1 × 10^{-7}-1.6 × 10^{-5}$ (90% CL) for $m_{A0} = 0.21-9.2$ GeV. See their Fig. 4.

5. AAD 20AE search for the decay $H^0 → ZA^0, Z → ℓ^+ℓ^-, A0$ decaying hadronically ($A0 → gg$ or $s\bar{s}$), in 139 fb⁻¹ of pp collisions at $E_{cm} = 13$ TeV. Limit on the product of production cross section and the $H^0 → ZA^0$ branching ratio in the range $17-340$ pb (95% CL) is given for $m_{A0} = 0.5-4.0$ GeV, see their Table I.

6. ABOUD 18AP search for the decay $H^0 → A0A0 → μ^+μ^-μ^+μ^-$ in 36.1 fb⁻¹ of pp collisions at $E_{cm} = 13$ TeV. See their Fig. 10(b) for limits on $B(H^0 → A0A0)$ in the range $m_{A0} = 1-2.5, 4.5-8$ GeV, assuming a type-II two-doublet plus singlet model with $\tan(β) = 5$.

7. KHACHATRYAN 17AZ search for the decay $H^0 → A0A0 → τ^+τ^-τ^+τ^-$ in 19.7 fb⁻¹ of pp collisions at $E_{cm} = 8$ TeV. See their Figs. 4, 5, and 6 for cross section limits in the range $m_{A0} = 5-62.5$ GeV. See also their Figs. 7, 8, and 9 for interpretation of the data in terms of models with two Higgs doublets and a singlet.

8. ABLIKIM 16E search for the process $J/ψ → A0γ$ with $A0$ decaying to $μ^+μ^-$ and give limits on $B(J/ψ → A0)·B(A0 → μ^+μ^-)$ in the range $2.8 × 10^{-8}-5.0 × 10^{-6}$ (90% CL) for 0.212 $≤ m_{A0} ≤ 3.0$ GeV. See their Fig. 5.

9. KHACHATRYAN 16F search for the decay $H^0 → A0A0 → τ^+τ^-τ^+τ^-$ in 19.7 fb⁻¹ of pp collisions at $E_{cm} = 8$ TeV. See their Fig. 8 for cross section limits for $m_{A0} = 4-8$ GeV.

10. LEES 15H search for the process $T(2S) → T(1S)π^+π^- → A0γπ^+π^-$ with $A0$ decaying to $cτ$ and give limits on $B(T(1S) → A0γ)·B(A0 → cτ)$ in the range $7.4 × 10^{-5}-2.4 × 10^{-3}$ (90% CL) for 4.00 $≤ m_{A0} ≤ 8.95$ and $9.10 ≤ m_{A0} ≤ 9.25$ GeV. See their Fig. 6.

11. LEES 13C search for the process $T(2S, 3S) → T(1S)π^+π^- → A0γπ^+π^-$ with $A0$ decaying to $μ^+μ^-$ and give limits on $B(T(1S) → A0γ)·B(A0 → μ^+μ^-)$ in the range $(0.3-9.7) × 10^{-6}$ (90% CL) for 0.212 $≤ m_{A0} ≤ 9.20$ GeV. See their Fig. 5(e) for limits on the $b-A0$ Yukawa coupling derived by combining this result with AUBERT 09Z.

12. LEES 13L search for the process $T(2S) → T(1S)π^+π^- → A0γπ^+π^-$ with $A0$ decaying to $gg$ or $s\bar{s}$ and give limits on $B(T(1S) → A0γ)·B(A0 → gg)$ between $1 × 10^{-6}$ and $2 × 10^{-2}$ (90% CL) for 0.5 $≤ m_{A0} ≤ 9.0$ GeV, and $B(T(1S) → A0)·B(A0 → s\bar{s})$ between $4 × 10^{-6}$ and $1 × 10^{-3}$ (90% CL) for 1.5 $≤ m_{A0} ≤ 9.0$ GeV. See their Fig. 4.

13. LEES 13R search for the process $T(2S) → T(1S)π^+π^- → A0γπ^+π^-$ with $A0$ decaying to $τ^+τ^-$ and give limits on $B(T(1S) → A0γ)·B(A0 → τ^+τ^-)$ in the range $0.9-13 × 10^{-5}$ (90% CL) for 3.6 $≤ m_{A0} ≤ 9.2$ GeV. See their Fig. 4 for limits on the $b-A0$ Yukawa coupling derived by combining this result with AUBERT 09P.

14. ABLIKIM 12 searches for the process $ψ(3686) → ππJ/ψ, J/ψ → A0γ$ with $A0$ decaying to $μ^+μ^-$. It gives mass dependent limits on $B(J/ψ → A0γ)·B(A0 → μ^+μ^-)$ in the range $4 × 10^{-7}-2.1 × 10^{-5}$ (90% CL.) for 0.212 $≤ m_{A0} ≤ 3.0$ GeV. See their Fig. 2.

15. CHATRCHYAN 12V search for $A0$ production in the decay $A0 → μ^+μ^-$ with 1.3 fb⁻¹ of $pp$ collisions at $E_{cm} = 7$ TeV. A limit on $σ(A0)·B(A0 → μ^+μ^-)$ in the range $(1.5-7.5)$ pb is given for $m_{A0} = (5.5-8.7)$ and $(11.5-14)$ GeV at 95% CL.

16. AALTONEN 11P search in 2.7 fb⁻¹ of $p\bar{p}$ collisions at $E_{cm} = 1.96$ TeV for the decay chain $t → bH^+, H^+ → W^+A0, A0 → τ^+τ^-$ with $m_{A0}$ between 4 and 9 GeV. See their Fig. 4 for limits on $B(t → bH^+) > 90 < m_{H^+} < 160$ GeV.

17. ABOUZAID 11A search for the decay chain $K_L → π^0π^0A0, A0 → μ^+μ^-$ and give a limit $B(K_L → π^0π^0A0) · B(A0 → μ^+μ^-) < 1.0 × 10^{-10}$ at 90% CL for $m_{A0} = 214.3$ MeV.

18. The search was motivated by PARK 05.

19. DEL-AMO-SANCHEZ 11J search for the process $T(2S) → T(1S)π^+π^- → A0γπ^+π^-$ with $A0$ decaying to invisible final states. They give limits on $B(T(1S) → A0γ)·B(A0 → invisible)$ in the range $(1.9-4.5) × 10^{-6}$ (90% CL) for $0 ≤ m_{A0} ≤ 8.0$ GeV, and $(2.7-37) × 10^{-6}$ for $8.0 ≤ m_{A0} ≤ 9.2$ GeV.

20. LEES 11H search for the process $T(2S, 3S) → A0γ$ with $A0$ decaying hadronically and give limits on $B(T(2S, 3S) → A0γ)·B(A0 → hadrons)$ in the range $1 × 10^{-6}-8 × 10^{-5}$ (90% CL) for $0.3 < m_{A0} < 7$ GeV. The decay rates for $T(2S)$ and $T(3S)$ are assumed to be equal up to the phase space factor. See their Fig. 5.

21. ANDREAS 10 analyze constraints from rare decays and other processes on a light $A0$ with $m_{A0} < 2m_μ$, and give limits on its coupling to fermions at the level of $10^{-4}$ times the Standard Model value.

22. HYUN 10 search for the decay chain $B^0 → K^*0A0, A0 → μ^+μ^-$ and give a limit on $B(B^0 → K^*0A0) · B(A0 → μ^+μ^-)$ in the range $(2.26-5.53) × 10^{-8}$ at 90% CL for $m_{A0} = 212-300$ MeV. The limit for $m_{A0} = 214.3$ MeV is $2.26 × 10^{-8}$.

23. HYUN 10 search for the decay chain $B^0 → ρ^0A0, A0 → μ^+μ^-$ and give a limit on $B(B^0 → ρ^0A0) · B(A0 → μ^+μ^-)$ in the range $(1.73-4.51) × 10^{-8}$ at 90% CL for $m_{A0} = 212-300$ MeV. The limit for $m_{A0} = 214.3$ MeV is $1.73 × 10^{-8}$.

24. AUBERT 09P search for the process $T(3S) → A0γ$ with $A0 → τ^+τ^-$ for 4.03 $< m_{A0} < 9.52$ and $9.61 < m_{A0} < 10.10$ GeV, and give limits on $B(T(3S) → A0γ)·B(A0 → τ^+τ^-)$ in the range $(1.5-16) × 10^{-5}$ (90% CL).

25. AUBERT 09Z search for the process $T(2S) → A0γ$ with $A0 → μ^+μ^-$ for 0.212 $< m_{A0} < 9.3$ GeV and give limits on $B(T(2S) → A0γ)·B(A0 → μ^+μ^-)$ in the range $(0.3-8) × 10^{-6}$ (90% CL).

26. AUBERT 09Z search for the process $T(3S) → A0γ$ with $A0 → μ^+μ^-$ for 0.212 $< m_{A0} < 9.3$ GeV and give limits on $B(T(3S) → A0γ)·B(A0 → μ^+μ^-)$ in the range $(0.3-5) × 10^{-6}$ (90% CL).

27. TUNG 09 search for the decay chain $K_L → π^0π^0A0, A0 → γγ$ and give a limit on $B(K_L → π^0π^0A0) · B(A0 → γγ)$ in the range $(2.4-10.7) × 10^{-7}$ at 90% CL for $m_{A0} = 194.3-219.3$ MeV. The limit for $m_{A0} = 214.3$ MeV is $2.4 × 10^{-7}$.

28. LOVE 08 search for the process $T(1S) → A0γ$ with $A0 → μ^+μ^-$ (for $m_{A0} < 2m_τ$) and $A0 → τ^+τ^-$. Limits on $B(T(1S) → A0γ) · B(A0 → ℓ^+ℓ^-)$ in the range $10^{-6}-10^{-4}$ (90% CL) are given.

29. BESSON 07 give a limit $B(T(1S) → η_bγ) · B(η_b → τ^+τ^-) < 0.27$% (95% CL), which constrains a possible $A0$ exchange contribution to the $η_b$ decay.

30. PARK 05 found four candidate events for $Σ^+ → pρμ^+μ^-$ in the HyperCP experiment. Due to a narrow spread in dimuon mass, they hypothesize the events as a possible signal of a new boson. It can be interpreted as a neutral particle with $m_{A0} = 214.3 ± 0.5$ MeV and the branching fraction $B(Σ^+ → pρA0)·B(A0 → μ^+μ^-) = (3.1^{+2.4}_{-1.9} ± 1.5) × 10^{-8}$.

31. BALEST 95 give limits $B(T(1S) → A0γ) : 1.5 × 10^{-5}$ at 90% CL for $m_{A0} < 5$ GeV. The limit becomes $< 10^{-4}$ for $m_{A0} < 7.7$ GeV.

32. ANTREASYAN 90C give limits $B(T(1S) → A0γ) : 5.6 × 10^{-5}$ at 90% CL for $m_{A0} < 7.2$ GeV. $A0$ is assumed not to decay in the detector.

## Other Mass Limits

We use a symbol $H^0$ if mass < 125 GeV or $H_2^0$ if mass > 125 GeV. The notation $H$ is reserved for the 125 GeV particle.

VALUE (GeV) CL% DOCUMENT ID TECN COMMENT

• • • We do not use the following data for averages, fits, limits, etc. • • •

1 AAD $H_0^0$ $Zγ$

2 AAD $H_0^0$ $HH$

3 AAD $A0^0$ $ZH_0^2$ $ZHH$

4 AAD $H^±$ $W^±A0$

5 AAD $t → qH_0^0, 1, 2$

6 AAD $H_0^0$ $W^+W^-$

7 AAD $t\bar{t}H_0^0/A0$

8 AAD $A0^0 t\bar{t}, A0 → μ^+μ^-$

9 AAD $H^+ + \text{invisible} A0$

10 AAD $H_0^0$ $H_0^0 H$

11 AAD flavor changing $H_0^0$

12 AAD $A0 → ZHγ$

13 AAD $H_0^0 γγ$

14 AAD $H_0^0 Zγ$

15 AAD $H_0^0 HH$

16 HAYRAPETY...23C CMS $H_0^1, 1, 2$

17 HAYRAPETY...23G CMS $A0 → μ^+μ^-$
3 AAD 23AD search for gluon fusion production of $A^0$ with the decay chain $A^0 \to ZH_2^0$, $H_2^0 \to HH \to b\bar{b}b\bar{b}$ using 139 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. See their Fig. 10 for limits on cross section times branching ratios for $m_{A^0} = 350-800$ GeV and $m_{H_2^0} = 260-400$ GeV.

4 AAD 23AJ search for production of $H^\pm$ in association with a top quark, followed by $H^\pm \to W^\pm A^0$, $A^0 \to$ invisible, using 139 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. See their Fig. 10 for excluded parameter regions of 2HDM + CP-odd singlet model.

5 AAD 23BD search for a top quark decaying to $qH_1^0$, $H_1^0$ ($q = u, c$), $H_{1,2}^0 \to b\bar{b}$, using 139 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. See their Fig. 9 for limits on production cross section times branching ratios for $m_{H_1^0,2} = 20-160$ GeV.

6 AAD 23BE search for associated production of $H_2^0 W$ and decay $H_2^0 \to W^+W^-$ assuming the presence of higher dimensional $H_2^0 W^+W^-$ interactions, using 139 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. See their Fig. 6 for excluded parameter region of higher dimensional operators, and Fig. 7 for limits on cross section times branching ratio for $m_{H_2^0} = 0.3-1.5$ TeV.

7 AAD 23BG search for production of $H_2^0/A^0$ in association with a $t\bar{t}$ pair, decaying to $t\bar{t}$, using 139 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. See their Fig. 7 for limits on cross section times branching ratios for $m_{H_2^0} = m_{A^0} = 0.4-1.0$ TeV.

8 AAD 23BW search for $A^0$ production in association with a $t\bar{t}$ pair, decaying to $\mu^+\mu^-$, using 139 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. See their Fig. 5(a) for limits on production cross section times branching ratio for $m_{A^0} = 15-72$ GeV.

9 AAD 23BX search for production of $H \to \tau^+\tau^-$ with missing transverse momentum using 139 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. See their Fig. 8 for interpretation of the data in terms of 2HDM + a model.

10 AAD 23CA search for production of $H_2^0$ decaying to $H_2^0 H$, $H_2^0 \to W^+W^-$ or $ZZ$, and $H \to \tau^+\tau^-$ using 140 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. See their Figs. 4, 5 for limits on production cross section times branching ratios in the ranges $m_{H_2^0} = 0.5-1.5$ TeV and $m_{H_2^0} = 0.2-0.5$ TeV.

11 AAD 23CR search for $H_2^0$ having flavor-violating couplings to $t c$ or $t u$, produced in association with top quark(s), using 139 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. See their Fig. 14 for limits on production cross section times branching ratios for $m_{H_2^0} = 0.2-1.5$ TeV with various assumptions on the flavor-changing couplings.

12 AAD 23O search for production of an $A^0$ in gluon-gluon fusion and in association with a $b\bar{b}$, decaying to $ZH$ in the final states $\nu b\bar{b}$ and $\ell^+\ell^- b\bar{b}$ using 139 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. See their Fig. 9 for limits on cross section times branching ratio for $m_{A^0} = 0.22-2.0$ TeV, and Fig. 11 for limits with both production components.

13 AAD 23R search for the decay $A^0 \to \gamma\gamma$ in 138 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. See their Fig. 7 for limits on cross section times branching ratio for $m_{A^0} = 10-70$ GeV.

14 AAD 23U search for the decay $H_2^0 \to Z\gamma$ with $Z$ decaying hadronically in 139 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. See their Fig. 8(a) for limits on production cross section times branching ratios for $m_{H_2^0} = 1.0-6.8$ TeV.

15 AAD 23Z search for the decay chain $H_2^0 \to HH \to b\bar{b}\tau^+\tau^-$ using 139 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. See their Fig. 10 for limits on the product of production cross section times branching ratios for $m_{H_2^0} = 0.251-1.6$ TeV.

16 HAYRAPETYAN 23C search for $H_{1,2}^0 \to e\mu$ using 138 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. See their Fig. 7 for limits on production cross section times branching ratio for $m_{H_1^0,2} = 110-160$ GeV.

17 HAYRAPETYAN 23G search for dimuon resonance in the mass range 1.1-2.6 or 4.2-7.9 GeV in 96.6 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV, in inclusive and high $p_T$ selections. See their Fig. 5 for cross section times branching ratio limits and Fig. 7 for mixing angle limits in two Higgs doublet plus singlet model (at 90% CL).

18 TUMASYAN 23 search for production of $H_3^0$ decaying to $H_{1,2}^0 H \to b\bar{b}b\bar{b}$ using 138 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. See their Fig. 4 for limits on production cross section times branching ratios for $m_{H_3^0} = 0.9-4.0$ TeV and $m_{H_{1,2}^0} = 60-600$ GeV, and their interpretation in the MSSM and the Two Real Singlet Model (TRSM).

19 TUMASYAN 23M search for the decay chain $H \to A^0 A^0 \to \gamma\gamma\gamma$ in 132 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. See their Fig. 6 for limits on cross section times branching ratio in the range $m_{A^0} = 15-62$ GeV.

20 TUMASYAN 23o search for $H_2^0 \to HH$, each H decaying to either $WW^*$ or $\tau^+\tau^-$ using 138 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. See their Fig. 14 (upper) for limit on the product of production cross section times branching ratios for $m_{H_2^0} = 0.25-1.0$ TeV.

21 TUMASYAN 23s search for gluon fusion and b-associated production of $H_{1,2}^0$ decaying to $\tau^+\tau^-$ using 138 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. See their Fig. 10 for limits on production cross section times branching ratios for $m_{H_{1,2}^0} = 0.06-3.5$ TeV.

22 AAD 22A search for the decay chain $H \to A^0 A^0 \to \mu^+\mu^- b\bar{b}$ in 139 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. See their Fig. 9 for limits on the overall branching fraction in the range $m_{A^0} = 16-62$ GeV. See also Fig. 11 for limits without assuming $A^0$ is pseudoscalar.

23 AAD 22D search for $ZA^0$ associate production with $Z \to \ell^+\ell^-$, $A^0$ decaying invisibly, in 139 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. See their Fig. 5 for excluded regions in the mass parameter space of two Higgs doublet plus singlet (2HDM+A$^0$) model with a certain choice of the model parameters.

24 AAD 22F search for gluon fusion production of $H_2^0$ decaying to $HH \to b\bar{b}b\bar{b}$ using 126-139 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. $B(H \to b\bar{b}) = 0.582$ is assumed. See their Fig. 14 for limit on the product of production cross section times branching ratios for $m_{H_2^0} = 0.251-5.0$ TeV.

25 AAD 22I search for $ZH$ associate production with the decay chain $H \to \tilde{\chi}_2^0 \tilde{\chi}_1^0$, $\tilde{\chi}_2^0 \to A^0 \tilde{\chi}_1^0$, $A^0 \to b\bar{b}$, and $Z \to \ell^+\ell^-$, in 139 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. See their Figs. 3 and 4 for limits on the product of cross section times the branching ratios for $m_{A^0} = 20-65$ GeV with various choices of NMSSM model parameters.

26 AAD 22J search for the decay $H \to ZA^0$ with $A^0 \to \mu^+\mu^-$ and $Z \to e^+e^-$, $\mu^+\mu^-$ in 139 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV assuming SM gluon-gluon fusion production of the H. See their Fig. 17(b) for limits on the product of cross section times the branching ratios for $m_{A^0} = 15-30$ GeV.

27 AAD 22J search for the decay $H \to A^0 A^0$ with $A^0 \to \mu^+\mu^-$ in 139 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV assuming SM gluon-gluon fusion production of the H in the range of $m_{A^0} = 1-60$ GeV. See their Fig. 14(b) for limits on the product of cross section times the branching ratios for $m_{A^0} = 1.5-60$ GeV (excluding $\psi$ and $\Upsilon$ regions). The limit also applies to the decay $H \to H_1^0 H_1^0$.

28 AAD 22P search for invisibly decaying $H_1^0, H_2^0$ produced by vector boson fusion in 139 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. Limit on the product of cross section times branching ratio in the range 0.1-1 pb (95% CL) is given for the mass range 0.05-2 TeV. See their Fig. 14.

29 AAD 22Y search for gluon fusion production of $H_2^0$ decaying to $HH \to b\bar{b}\gamma\gamma$ in 139 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. See their Fig. 15 for limit on the product of production cross section times branching ratios to $HH$ for $m_{H_2^0} = 0.251-1.0$ TeV.

30 ABRATENKO 22A search for a singlet scalar boson $H_1^0$ having a small mixing with the SM Higgs boson in the decay chain $K^+ \to H_1^0 \pi^+$, $H_1^0 \to \mu^+\mu^-$ from data corresponding to $7.01 \times 10^{20}$ protons on NuMI target. See their Fig. 13 (right) and Table V for limits on the SM Higgs component of $H_1^0$ for $m_{H_1^0} = 212-279$ MeV.

31 TUMASYAN 22AK search for gluon-fusion production of $H_3^0$ decaying to $H_1^0 H_1^0 \to b\bar{b}b\bar{b}$ in 138 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. See their Fig. 5 for limits on cross section times branching ratio for $m_{H_3^0} = 1-3$ TeV, $m_{H_3^0} = 25-100$ GeV.

32 TUMASYAN 22D search for production of an $H_2^0$ (denoted radion in the paper) in gluon fusion and vector boson fusion, decaying to $W^+W^-$ in the final states $\ell\nu +$ hadrons, using 137 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. See their Fig. 7 for limits on cross section times branching ratio for $m_{H_2^0} = 1.0-4.5$ TeV.

33 AAD 21AF search for production of a heavy $H_2^0$ state decaying to $ZZ$ in the final states $\ell^+\ell^- \ell^+\ell^-$ and $\ell^+\ell^- \nu\tau$ in 139 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. See their Fig. 4 for upper limits on cross section times branching ratio for $m_{H_2^0} = 0.2-2.0$ TeV assuming ggF or VBF with narrow width approximation, and Fig. 5 for upper limits on cross section times branching ratio for $m_{H_2^0} = 0.4-2.0$ TeV assuming ggF, and with several assumptions on its width.

34 AAD 21AI search for production of an $A^0$ in gluon-gluon fusion and in association with a $b\bar{b}$, decaying to $ZH_2^0 \to \ell^+\ell^- b\bar{b}$ or $\ell^+\ell^- W^+W^-$ in 139 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. See their Figs. 9 and 13 for cross section limits for $m_{A^0} = 230-800$ GeV and $m_{H_2^0} = 130-700$ GeV.

35 AAD 21AY search for production of a scalar resonance decaying to $\gamma\gamma$ in 139 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. See their Fig. 5(a) for limits on fiducial cross section times branching ratio for $m_{H_2^0} = 0.16-3$ TeV with narrow width approximation, and Table 2 with several assumptions on the width.

36 AAD 21AZ search for production of $A_2^0$ decaying to $HA_1^0$ followed by $H \to \gamma\gamma$, $A_1^0 \to$ invisible in 139 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. See their Figs. 10-12 for limits in terms of two-Higgs-doublet model plus singlet pseudoscalar and a fermionic Dark Matter particle.

37 AAD 21BB search for production of $A_2^0$ by gluon fusion or associated $A_2^0 b\bar{b}$ production, decaying to $HA_1^0$ followed by $H \to b\bar{b}$, $A_1^0 \to$ invisible in 139 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. See their Fig. 8 for limits in terms of two-Higgs-doublet model plus singlet pseudoscalar model.

38 AAD 21BE search for production of $A_1^0$ associated with a single top quark and either a light quark or a W boson, decaying to invisible final states, in 139 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. See their Figs. 13-15 for limits in terms of two-Higgs-doublet model plus singlet pseudoscalar, which is assumed to decay to a pair of Dark Matter particles.

39 ABRATENKO 21 search for a singlet scalar boson $H_1^0$ having a small mixing with the SM Higgs boson in the decay chain $K^+ \to H_1^0 \pi^+$, $H_1^0 \to e^+e^-$ from data corresponding to $1.93 \times 10^{20}$ protons on NuMI target. See their Fig. 2 for limits on the SM Higgs component of $H_1^0$ for $m_{H_1^0} = 3-210$ MeV.

40 SIRUNYAN 21A search for $H_2^0 \to ZA^0$ with $Z \to \ell^+\ell^-$, $A^0$ decaying invisibly, in 137 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. See their Fig. 8 for excluded regions in the mass parameter space of two Higgs doublet plus singlet model with a certain choice of the model parameters.

41 TUMASYAN 21f search for gluon fusion production of $H_3^0$ decaying to $HH_{1,2}^0 \to \tau^+\tau^- b\bar{b}$ in 137 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. See their Figs. 5 and 6 for limits on cross section times branching ratio for $m_{H_1^0,2} = 0.06-2.8$ TeV and $m_{H_3^0} = 0.24-3.0$ TeV.

42 AAD 20AA search for $H_2^0/A^0 \to \tau^+\tau^-$ produced by gluon fusion or b-associated production using 139 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. See their Fig. 2(a), 2(b) for limits on the product of cross section and branching ratio for $m_{H_2^0}, m_{A^0} = 0.2-2.5$ TeV.

43 AAD 20AI search for $ZH$ production followed by the decay $H \to A^0 A^0 \to b\bar{b}b\bar{b}$ in 36 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. The search looks for collimated $A^0 \to b\bar{b}$ decays and is complementary to AABOUD 18bX. See their Fig. 10 for limits on the product of production cross section and branching ratios in the range $m_{A^0} = 15-30$ GeV.
44 AAD 20AO search for gluon fusion production of $H_2^0$ decaying to $HH \to \tau^+\tau^- b\bar{b}$ (with hadronically decaying $\tau^+\tau^-$) using 139 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. Limit on the product of production cross section times branching ratios in the range 28–817 fb (95% CL) is given for $m_{A0} = 1.0–3.0$ TeV, see their Fig. 13.

45 AAD 20C combine searches for a scalar resonance decaying to $HH$ in 36.1 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV from AABOUD 19A, AABOUD 19O, AABOUD 18CQ, AABOUD 19T, AABOUD 18CW, and AABOUD 18BU. See their Fig. 5(a) for limits on cross section times branching ratio for $m_{H_2^0} = 0.26–3$ TeV.

46 AAD 20L search for b-associated production of $H_2^0$ decaying to $b\bar{b}$ in 27.8 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. See their Fig. 8 for limits on the product of cross section and branching ratio for $m_{H_2^0} = 0.45–1.4$ TeV.

47 AAD 20x search for vector-boson-fusion production of $H_2^0$ decaying to $HH$ using 126 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. See their Fig. 5 for limits on the product of cross section and branching ratio for the assumptions of a narrow- and broad-width resonance.

48 AAJL 20AL search for diquon resonance in the mass range 0.2–60 GeV in 5.1 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV, in inclusive and b quark associated production. Displaced decays are searched for for masses below 3 GeV. See their Figs. 7–9 for cross section limits and Fig. 10 for limits for mixing angle in two Higgs doublet plus singlet model (at 90% CL).

49 SIRUNYAN 20 search for the decay $H \to A^0 A^0 \to \tau^+\tau^-\tau^+\tau^-$ or $\tau^+\tau^-\mu^+\mu^-$ in 35.9 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. See their Fig. 10 for limits on the product of production cross section (normalized to the SM) and branching ratios in the range $m_{A0} = 4–15$ GeV.

50 SIRUNYAN 20AA search for $H_2^0 \to ZA^0, A^0 \to b\bar{b}$ or $A^0 \to ZH_2^0, H_2^0 \to b\bar{b}$ in 35.9 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. See their Fig. 7 for limits on the product of cross section and branching ratio for $m_{H_2^0} = 0.12–1$ TeV and $m_{A0} = 0.03–1$ TeV.

51 SIRUNYAN 20AC search for gluon-fusion production of $A^0$ decaying to $ZH$ in 35.9 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. See their Fig. 5 for limits on the product of cross section and branching ratios for $m_{A0} = 220–400$ GeV.

52 SIRUNYAN 20AD search for lepton-flavor violating decays $H_2^0 \to \mu\tau, \epsilon\tau$ of gluon-fusion-produced $H_2^0$ in 35.9 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. See their Fig. 5 (9) and Table 5 (6) for limits on production cross section times branching ratio for $m_{H_2^0} = 0.2–0.9$ TeV for the $\mu\tau$ ($e\tau$) final state.

53 SIRUNYAN 20AF search for $H_2^0/A^0 \to t\bar{t}$ with one or two charged leptons in the final state using kinematic variables in 35.9 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. See their Figs. 5 and 6 for limits on top Yukawa coupling of $H_2^0$ and $A^0$ for $m_{H_2^0}, m_{A0} = 0.4–0.75$ TeV for various top assumptions.

54 SIRUNYAN 20AP search for the decay $H$ or $H_2^0 \to A^0 A^0 \to \mu^+\mu^-\tau^+\tau^-$ (for $m_{H_2^0} = 300$ GeV) with boosted final-state topology in 35.9 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. See their Fig. 7 for limits on the product of production cross section (normalized to the SM) and branching ratios in the range $m_{A0} = 3.6–21$ GeV, and Figs. 8 and 9 for its interpretation in terms of models with two Higgs doublets plus a singlet.

55 SIRUNYAN 20Y search for gluon-fusion and vector-boson-fusion production of $H_2^0$ decaying to $W^+W^-$ in the final states $\ell\nu\ell\nu$ and $\ell\nu qq$ in 35.9 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. See their Fig. 6 for limits on the product of cross section and branching ratio for $m_{H_2^0} = 0.2–3$ TeV.

56 SIRUNYAN 20Z search for $H_{1,2}^0$ or $A^0$ production in association with a $t\bar{t}$ pair, decaying to $e^+e^-$ or $\mu^+\mu^-$, in 137 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. See their Fig. 12 for limits on production cross section times branching ratio for $m_{H_{1,2}^0}, m_{A0} = 15–75$ GeV and 108–340 GeV.

57 AABOUD 19A search for a narrow scalar resonance decaying to $HH \to b\bar{b}b\bar{b}$ in 27.5–36.1 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. See their Fig. 9(a) for limits on cross section times branching ratios for $m_{H_2^0} = 0.26–3$ TeV.

58 AABOUD 19AG search for the decay $H \to A^0 A^0 \to \mu^+\mu^- b\bar{b}$ in 36.7 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. See their Fig. 6 (a) for limits on the product of production cross section (normalized to the SM) and branching ratios in the range $m_{A0} = 20–60$ GeV.

59 AABOUD 19W search for a scalar resonance decaying to $HH \to b\bar{b}WW^*$ in 36.1 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. See their Fig. 12 (left) for limits on cross section times branching ratio for $m_{H_2^0} = 0.5–3$ TeV.

60 AABOUD 19T search for a scalar resonance decaying to $HH \to WW^*WW^*$ in 36.1 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. See their Fig. 3 for limits on cross section times branching ratio for $m_{H_2^0} = 260–500$ GeV, assuming SM decay rates for the H.

61 AABOUD 19V combine published ATLAS data to constrain two-Higgs-doublet plus singlet pseudoscalar model with $A_1^0$ decaying to invisible final states. See their Fig. 19 for excluded parameter regions.

62 AABOUD 19Y search for a narrow scalar resonance produced by gluon fusion or b associated production, decaying to $\mu^+\mu^-$ in 36.1 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. See their Figs. 4 and 5(a) for cross section limits for $m_{H_2^0} = 0.2–1.0$ TeV.

63 AALTONEN 19 search for b associated production of a scalar particle decaying to $b\bar{b}$ in 5.4 fb$^{-1}$ of $p\bar{p}$ collisions at $E_{cm} = 1.96$ TeV. See their Fig. 3 for limits on cross section times branching ratio for $m_{H_{1,2}^0} = 100–300$ GeV.

64 SIRUNYAN 19 search for a narrow scalar resonance decaying to $HH \to \gamma\gamma b\bar{b}$ in 35.9 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. See their Fig. 9 (left) for limits on cross section times branching ratios for $m_{H_2^0} = 260–900$ GeV.

65 SIRUNYAN 19AE search for a scalar resonance produced in association with a $b\bar{b}$ pair, decaying to $\tau^+\tau^-$ in 35.9 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. See their Fig. 4 for cross section limits for $m_{A0} = 25–70$ GeV.

66 SIRUNYAN 19AN search for production of $A_2^0$ decaying to $HA_1^0$ followed by $H \to b\bar{b}, A_1^0 \to$ invisible in 35.9 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV, in the mass range $m_{A_2^0} = 0.2–1.6$ TeV, $m_{A_1^0} = 0.15–0.5$ TeV. See their Fig. 6 for limits in terms of two-Higgs-doublet plus singlet pseudoscalar model.

67 SIRUNYAN 19AV search for a scalar resonance produced by gluon fusion or b-associated production, decaying to $ZH \to \ell^+\ell^- b\bar{b}$ ($\ell = e, \mu$) or $\nu\bar{\nu}b\bar{b}$ in 35.9 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. See their Fig. 5 for cross section limits for $m_{A0} = 0.22–1.0$ TeV.

68 SIRUNYAN 19B search for gluon fusion production of narrow scalar resonance with large transverse momentum, decaying to $b\bar{b}$, in 35.9 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. See their Figs. 7 and 8 for limits on cross section times branching ratio for the resonance mass of 50–350 GeV.

69 SIRUNYAN 19BB search for the decay $H_2^0 \to \gamma\gamma$ in 19.7 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 8$ TeV and 35.9 fb$^{-1}$ at $E_{cm} = 13$ TeV. See their Figs. 4–6 for limits on cross section times branching ratio for $m_{H_2^0} = 80–110$ GeV (some results in Fig. 5 for $m_{H_2^0} = 70–110$ GeV).

70 SIRUNYAN 19BD search for the decay $H \to A^0 A^0 \to \mu^+\mu^- b\bar{b}$ in 35.9 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. See their Fig. 5 for limits on the product of cross section times branching ratios in the range $m_{A0} = 20–62.5$ GeV. See also their Figs. 6 and 7 for interpretation of the data in terms of models with two Higgs doublets and a singlet.

71 SIRUNYAN 19BE combine searches for $H_2^0 \to HH$ in 35.9 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV in various H decay modes, from SIRUNYAN 18A, SIRUNYAN 18AF, SIRUNYAN 18CW, SIRUNYAN 19A, and SIRUNYAN 19H. See their Fig. 3 for limits on cross section times branching ratios for $m_{H_2^0} = 0.25–3$ TeV.

72 SIRUNYAN 19BQ search for production of $H_{1,2}^0$ decaying to $A^0 A^0 \to \mu^+\mu^-\mu^+\mu^-$ in 35.9 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. See their Fig. 2 for limits on cross section times branching ratio for $m_{H_{1,2}^0} = 90–150$ GeV, $m_{A0} = 0.25–3.55$ GeV.

73 SIRUNYAN 19CR search for production of $H_2^0/A^0$ in gluon fusion and in association with a $b\bar{b}$ pair, decaying to $\mu^+\mu^-$ in 35.9 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. See their Fig. 6 for limits on cross section times branching ratio.

74 SIRUNYAN 19H search for a narrow scalar resonance decaying to $HH \to b\bar{b}b\bar{b}$ in 35.9 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV, where one $b\bar{b}$ pair is resolved and the other not. Limits on cross section times branching ratios for $m_{H_2^0} = 0.75–1.6$ TeV are obtained and combined with data from SIRUNYAN 18AF. See their Fig. 5 (right).

75 AABOUD 18AA search for production of a scalar resonance decaying to $Z\gamma$, with $Z$ decaying hadronically, in 36.1 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. See their Fig. 8(a) for limits on cross section times branching ratio for $m_{H_2^0} = 1.0–6.8$ TeV.

76 AABOUD 18AG search for the decay $H \to A^0 A^0 \to \gamma\gamma g$ in 36.7 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. See their Fig. 2 and Table 6 for cross section limits in the range $m_{A0} = 20–60$ GeV.

77 AABOUD 18AH search for production of an $A^0$ in gluon-gluon fusion and in association with a $b\bar{b}$, decaying to $ZH_2^0 \to \ell^+\ell^- b\bar{b}$ in 36.1 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. See their Fig. 5 for cross section limits for $m_{A0} = 230–800$ GeV and $m_{H_2^0} = 130–700$ GeV.

78 AABOUD 18AI search for production of an $A^0$ in gluon-gluon fusion and in association with a $b\bar{b}$, decaying to $ZH$ in the final states $\nu\bar{\nu}b\bar{b}$ and $\ell^+\ell^- b\bar{b}$ in 36.1 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. See their Fig. 6 for cross section limits for $m_{A0} = 0.2–2$ TeV. See also AABOUD 18CC.

79 AABOUD 18BR search for production of a heavy $H_2^0$ state decaying to $ZZ$ in the final states $\ell^+\ell^- \ell^+\ell^-$ and $\ell^+\ell^- \nu\bar{\nu}$ in 36.1 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. See their Fig. 6 for upper limits on cross section times branching ratio for $m_{H_2^0} = 0.2–1.2$ TeV assuming ggF or VBF with the NWA. See their Fig. 7 for upper limits on cross section times branching ratio for $m_{H_2^0} = 0.4–1.0$ TeV assuming ggF, and with several assumptions on its width.

80 AABOUD 18BU search for a narrow scalar resonance decaying to $HH \to \gamma\gamma WW^*$ in 36.1 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. See their Fig. 4 for limits on cross section times branching ratios for $m_{H_2^0} = 260–500$ GeV.

81 AABOUD 18BX search for associated production of $WH$ or $ZH$ followed by the decay $H \to A^0 A^0 \to b\bar{b}b\bar{b}$ in 36.1 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. See their Fig. 9 for limits on cross section times branching ratios for $m_{A0} = 20–60$ GeV. See also their Fig. 10 for the dependence of the limit on $A^0$ lifetime.

82 AABOUD 18CQ search for a narrow scalar resonance decaying to $HH \to b\bar{\nu}\tau^+\tau^-$ in 36.1 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. See their Fig. 2 (above) for limits on cross section times branching ratios for $m_{H_2^0} = 260–1000$ GeV.

83 AABOUD 18DF search for production of a narrow scalar resonance decaying to $W^+W^-$ and $ZZ$, followed by hadronic decays of $W$ and $Z$, in 36.7 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. See their Fig. 5(c) for limits on cross section times branching ratio for $m_{H_2^0} = 1.2–3.0$ TeV.

84 AAJL 18AM search for gluon-fusion production of $H_{1,2}^0$ decaying to $\mu\tau$ in 2 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 8$ TeV. See their Fig. 2 for limits on cross section times branching ratio for $m_{H_{1,2}^0} = 45–195$ GeV.

85 AAJL 18AQ search for gluon-fusion production of a scalar particle $A^0$ decaying to $\mu^+\mu^-$ in 1.99 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 8$ TeV and 0.98 fb$^{-1}$ at $E_{cm} = 7$ TeV. See their Fig. 4 for limits on cross section times branching ratio for $m_{A0} = 5.5–15$ GeV (using the $E_{cm} = 8$ TeV data set).

86 AAJL 18AQ search for the decay $H \to A^0 A^0$, with one of the $A^0$ decaying to $\mu^+\mu^-$, in 1.99 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 8$ TeV and 0.98 fb$^{-1}$ at $E_{cm} = 7$ TeV. See their Fig. 5 (right) for limits on the product of branching ratios for $m_{A0} = 5.5–15$ GeV (using the $E_{cm} = 8$ TeV data set).

87 SIRUNYAN 18AF search for a narrow scalar resonance decaying to $HH \to b\bar{b}b\bar{b}$ in 35.9 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV, where both $b\bar{b}$ pairs are not resolved. See their Fig. 9 for limits on cross section times branching ratios for $m_{H_2^0} = 0.75–3$ TeV.
88 SIRUNYAN 18BA search for production of a heavy $H_2^0$ state decaying to ZZ in the final states $ℓ^+ℓ^−ℓ^+ℓ^−$, $ℓ^+ℓ^−q\bar{q}$, and $ℓ^+ℓ^−ν\nu$ in 35.9 fb$^{-1}$ of pp collisions at $E_{cm} = 13$ TeV. See their Figs. 10 and 11 for upper limits on cross section times branching ratio for $m_{H_2^0} = 0.13-3$ TeV with several assumptions on its width and on the fraction of Vector-Boson-Fusion of the total production cross section.

89 SIRUNYAN 18CW search for a narrow scalar resonance decaying to $HH \to b\bar{b}b\bar{b}$ in 35.9 fb$^{-1}$ of pp collisions at $E_{cm} = 13$ TeV, where both $b\bar{b}$ pairs are resolved. See their Fig. 9 for limits on cross section times branching ratios for $m_{H_2^0} = 260-1200$ GeV.

90 SIRUNYAN 18DK search for production of a scalar resonance decaying to $Z\gamma$, with $Z$ decaying to $ℓ^+ℓ^−$ or hadronically, in 35.9 fb$^{-1}$ of pp collisions at $E_{cm} = 13$ TeV. See their Fig. 7 for limits on cross section times branching ratio for $m_{H_2^0} = 0.35-4$ TeV for different assumptions on the width of the resonance.

91 SIRUNYAN 18DT search for the decay $H \to A^0A^0 \to \tau^+\tau^−b\bar{b}$ in 35.9 fb$^{-1}$ of pp collisions at $E_{cm} = 13$ TeV. See their Fig. 7 for limits on the product of branching ratios in the range $m_{A^0} = 15-60$ GeV. See also their Fig. 8 for interpretation of the data in terms of models with two Higgs doublets and a singlet.

92 SIRUNYAN 18DU search for production of a narrow scalar resonance decaying to $γγ$ in 35.9 fb$^{-1}$ (taken in 2016) of pp collisions at $E_{cm} = 13$ TeV. See their Fig. 3 (right) for limits on cross section times branching ratio for $m_{H_2^0} = 0.5-5$ TeV for several values of its width-to-mass ratio.

93 SIRUNYAN 18ED search for production of an $A^0$ in gluon-gluon fusion and in association with a $b\bar{b}$, decaying to $ZH$ in the final states $ν\bar{b}b$ or $ℓ^+ℓ^−b\bar{b}$ in 35.9 fb$^{-1}$ of pp collisions at $E_{cm} = 13$ TeV. See their Fig. 8 for cross section limits for $m_{A^0} = 0.8-2$ TeV.

94 SIRUNYAN 18EE search for the decay $H \to A^0A^0 \to \mu^+\mu^−\tau^+\tau^−$ in 35.9 fb$^{-1}$ of pp collisions at $E_{cm} = 13$ TeV. See their Fig. 4 for limits on the product of branching ratios in the range $m_{A^0} = 15-62.5$ GeV, normalized to the SM production cross section. See also their Fig. 5 for interpretation of the data in terms of models with two Higgs doublets and a singlet.

95 SIRUNYAN 18F search for a narrow scalar resonance decaying to $HH \to WWb\bar{b}$ or $ZZb\bar{b}$ in the final state $ℓ^+ℓ^−b\bar{b}$ in 35.9 fb$^{-1}$ of pp collisions at $E_{cm} = 13$ TeV. See their Fig. 7 for limits on cross section times branching ratios for $m_{H_2^0} = 250-900$ GeV.

96 AABOUD 17 search for production of a scalar resonance decaying to $Z\gamma$ in 3.2 fb$^{-1}$ of pp collisions at $E_{cm} = 13$ TeV. See their Fig. 4 for the limits on cross section times branching ratio for $m_{H_2^0} = 0.25-3.0$ TeV.

97 AABOUD 17AP search for production of a scalar resonance decaying to $γγ$ in 36.7 fb$^{-1}$ of pp collisions at $E_{cm} = 13$ TeV. See their Fig. 4(a) for limits on fiducial cross section times branching ratio for $m_{H_2^0} = 0.2-2.7$ TeV with narrow width approximation.

98 AABOUD 17AW search for production of a scalar resonance decaying to $Z\gamma$ in 36.1 fb$^{-1}$ of pp collisions at $E_{cm} = 13$ TeV. See their Fig. 7 for limits on cross section times branching ratio for $m_{H_2^0} = 0.25-2.4$ TeV.

99 KHACHATRYAN 17AZ search for the decay $H \to A^0A^0 \to \tau^+\tau^−\tau^+\tau^−$, $\mu^+\mu^−b\bar{b}$, and $\mu^+\mu^−\tau^+\tau^−$ in 19.7 fb$^{-1}$ of pp collisions at $E_{cm} = 8$ TeV. See their Figs. 4, 5, and 6 for cross section limits in the range $m_{A^0} = 5-62.5$ GeV. See also their Fig. 7, 8, and 9 for interpretation of the data in terms of models with two Higgs doublets and a singlet.

100 KHACHATRYAN 17D search for production of a scalar resonance decaying to $Z\gamma$ in 19.7 fb$^{-1}$ of pp collisions at $E_{cm} = 8$ TeV and 2.7 fb$^{-1}$ at $E_{cm} = 13$ TeV. See their Figs. 3 and 4 for the limits on cross section times branching ratio for $m_{H_2^0} = 0.2-2.0$ TeV.

101 KHACHATRYAN 17R search for production of a narrow scalar resonance decaying to $γγ$ in 12.9 fb$^{-1}$ (taken in 2016) of pp collisions at $E_{cm} = 13$ TeV. See their Fig. 2 for limits on cross section times branching ratio for $m_{H_2^0} = 0.5-4.5$ TeV for several values of its width-to-mass ratio. Limits from combination with KHACHATRYAN 16M are shown in their Figs. 4 and 6.

102 SIRUNYAN 17CN search for a narrow scalar resonance decaying to $HH \to b\bar{b}\tau^+\tau^−$ in 18.3 fb$^{-1}$ of pp collisions at $E_{cm} = 8$ TeV. See their Fig. 5 (above) and Table II for limits on the cross section times branching ratios for $m_{H_2^0} = 0.3-1$ TeV, and Fig. 6 (above) and Table III for the corresponding limits by combining with data from KHACHATRYAN 16BQ and KHACHATRYAN 15R.

103 SIRUNYAN 17Y search for production of a scalar resonance decaying to $Z\gamma$ in 19.7 fb$^{-1}$ of pp collisions at $E_{cm} = 8$ TeV and 2.7 fb$^{-1}$ at $E_{cm} = 13$ TeV. See their Figs. 3, 4 and Table II for limits on cross section times branching ratio for $m_{H_2^0} = 0.7-3.0$ TeV, and Fig. 5 for the corresponding limits for $m_{H_2^0} = 0.2-3.0$ TeV from combination with KHACHATRYAN 17D data.

104 AABOUD 16AB search for associated production of $WH$ with the decay $H \to A^0A^0 \to b\bar{b}b\bar{b}$ in 3.2 fb$^{-1}$ of pp collisions at $E_{cm} = 13$ TeV. See their Fig. 8 for limits on cross section times branching ratios for $m_{A^0} = 20-60$ GeV.

105 AABOUD 16AE search for production of a narrow scalar resonance decaying to $W^+W^-$ and $ZZ$ in 3.2 fb$^{-1}$ of pp collisions at $E_{cm} = 13$ TeV. See their Fig. 4 for limits on cross section times branching ratio for $m_{H_2^0} = 0.5-3$ TeV.

106 AABOUD 16H search for production of a scalar resonance decaying to $γγ$ in 3.2 fb$^{-1}$ of pp collisions at $E_{cm} = 13$ TeV. See their Fig. 12 for limits on cross section times branching ratio for $m_{H_2^0} = 0.2-2$ TeV with different assumptions on the width.

107 AABOUD 16I search for a narrow scalar resonance decaying to $HH \to b\bar{b}b\bar{b}$ in 3.2 fb$^{-1}$ of pp collisions at $E_{cm} = 13$ TeV. See their Fig. 10(c) for limits on cross section times branching ratios for $m_{H_2^0} = 0.5-3$ TeV.

108 AAD 16AX search for production of a heavy H state decaying to ZZ in the final states $ℓ^+ℓ^−ℓ^+ℓ^−$, $ℓ^+ℓ^−ν\nu$, $ℓ^+ℓ^−q\bar{q}$, and $ν\bar{ν}q\bar{q}$ in 20.3 fb$^{-1}$ of pp collisions at $E_{cm} = 8$ TeV. See their Fig.12 for upper limits on $σ(H)B(H \to ZZ)$ for $m_H$ ranging from 140 GeV to 1000 GeV.

109 AAD 16C search for production of a heavy H state decaying to $W^+W^-$ in the final states $ℓνℓν$ and $ℓνqq$ in 20.3 fb$^{-1}$ of pp collisions at $E_{cm} = 8$ TeV. See their Figs.

12, 13, and 16 for upper limits on $σ(H)B(H \to W^+W^-)$ for $m_H$ ranging from 300 GeV to 1000 or 1500 GeV with various assumptions on the total width of H.

110 AAD 16L search for the decay $H \to A^0A^0 \to γγγ$ in 20.3 fb$^{-1}$ of pp collisions at $E_{cm} = 8$ TeV. See their Fig. 4 (upper right) for limits on cross section times branching ratios (normalized to the SM H cross section) for $m_{A^0} = 10-60$ GeV.

111 AAD 16L search for the decay $H_2^0 \to A^0A^0 \to γγγ$ in 20.3 fb$^{-1}$ of pp collisions at $E_{cm} = 8$ TeV. See their Fig. 4 (lower right) for limits on cross section times branching ratios for $m_{H_2^0} = 600$ GeV and $m_{A^0} = 10-245$ GeV, and Table 5 for limits for $m_{H_2^0} = 300$ and 900 GeV.

112 AALTONEN 16C search for electroweak associated production of $H_1^0 H^±$ followed by the decays $H^± \to H_1^0 W^*$, $H_1^0 \to γγ$ for $m_{H_1^0} = 10-105$ GeV and $m_{H^±} = 30-300$ GeV. See their Fig. 3 for excluded parameter region in a two-doublet model in which $H_1^0$ has no direct decay to fermions.

113 KHACHATRYAN 16BG search for a narrow scalar resonance decaying to $HH \to b\bar{b}b\bar{b}$ in 19.7 fb$^{-1}$ of pp collisions at $E_{cm} = 8$ TeV. See their Fig. 6 for limits on the cross section times branching ratios for $m_{H_2^0} = 1.15-3$ TeV.

114 KHACHATRYAN 16BQ search for a resonance decaying to $HH \to γγb\bar{b}$ in 19.7 fb$^{-1}$ of pp collisions at $E_{cm} = 8$ TeV. See their Fig. 9 for limits on the cross section times branching ratios for $m_{H_2^0} = 0.26-1.1$ TeV.

115 KHACHATRYAN 16P search for the decay $H \to H_1^0 H_1^0 \to τ^+τ^−τ^+τ^−$ in 19.7 fb$^{-1}$ of pp collisions at $E_{cm} = 8$ TeV. See their Fig. 6 for cross section limits for $m_{H_1^0} = 4-8$ GeV.

116 KHACHATRYAN 16M search for production of a narrow resonance decaying to $γγ$ in 19.7 fb$^{-1}$ of pp collisions at $E_{cm} = 8$ TeV and 3.3 fb$^{-1}$ at $E_{cm} = 13$ TeV. See their Fig. 3 (top) for limits on cross section times branching ratio for $m_{H_2^0} = 0.5-4$ GeV.

117 KHACHATRYAN 16P search for gluon fusion production of an $H_2^0$ decaying to $HH \to b\bar{b}\tau^+\tau^−$ in 19.7 fb$^{-1}$ of pp collisions at $E_{cm} = 8$ TeV. See their Fig. 8 (lower right) for cross section limits for $m_{H_2^0} = 260-350$ GeV.

118 KHACHATRYAN 16P search for gluon fusion production of an $A^0$ decaying to $ZH \to ℓ^+ℓ^−τ^+τ^−$ in 19.7 fb$^{-1}$ of pp collisions at $E_{cm} = 8$ TeV. See their Fig. 10 for cross section limits for $m_{H_2^0} = 220-350$ GeV.

119 AAD 15BK search for production of a heavy $H_2^0$ decaying to $HH$ in the final state $b\bar{b}b\bar{b}$ in 19.5 fb$^{-1}$ of pp collisions at $E_{cm} = 8$ TeV. See their Fig. 14(c) for $σ(H_2^0)B(H_2^0 \to HH)$ for $m_{H_2^0} = 500-1500$ GeV with $\Gamma_{H_2^0} = 1$ GeV.

120 AAD 15BZ search for the decay $H \to A^0A^0 \to \mu^+\mu^−\tau^+\tau^−$ ($m_H = 125$ GeV) in 20.3 fb$^{-1}$ of pp collisions at $E_{cm} = 8$ TeV. See their Fig. 6 for limits on cross section times branching ratio for $m_{A^0} = 3.7-50$ GeV.

121 AAD 15BZ search for a state $H_2^0$ via the decay $H_2^0 \to A^0A^0 \to \mu^+\mu^−\tau^+\tau^−$ in 20.3 fb$^{-1}$ of pp collisions at $E_{cm} = 8$ TeV. See their Fig. 6 for limits on cross section times branching ratio for $m_{H_2^0} = 100-500$ GeV and $m_{A^0} = 5$ GeV.

122 AAD 15CE search for production of a heavy $H_2^0$ decaying to $HH$ in the final states $b\bar{b}\tau^+\tau^−$ and $γγWW^*$ in 20.3 fb$^{-1}$ of pp collisions at $E_{cm} = 8$ TeV and combine with data from AAD 15H and AAD 15BK. A limit $σ(H_2^0)B(H_2^0 \to HH) < 2.1-0.011$ pb (95% CL) is given for $m_{H_2^0} = 260-1000$ GeV. See their Fig. 6.

123 AAD 15H search for production of a heavy $H_2^0$ decaying to $HH$ in the final state $γγb\bar{b}$ in 20.3 fb$^{-1}$ of pp collisions at $E_{cm} = 8$ TeV. A limit of $σ(H_2^0)B(H_2^0 \to HH) < 3.5-0.7$ pb is given for $m_{H_2^0} = 260-500$ GeV at 95% CL. See their Fig. 3.

124 AAD 15S search for production of $A^0$ decaying to $ZH \to ℓ^+ℓ^−b\bar{b}$, $ν\bar{ν}b\bar{b}$ and $ℓ^+ℓ^−τ^+τ^−$ in 20.3 fb$^{-1}$ of pp collisions at $E_{cm} = 8$ TeV. See their Fig. 3 for cross section limits for $m_{A^0} = 200-1000$ GeV.

125 KHACHATRYAN 15AW search for production of a heavy state $H_2^0$ of an electroweak singlet extension of the Standard Model via the decays of $H_2^0$ to $W^+W^-$ and $ZZ$ in up to 5.1 fb$^{-1}$ of pp collisions at $E_{cm} = 7$ TeV and up to 19.7 fb$^{-1}$ at $E_{cm} = 8$ TeV in the range $m_{H_2^0} = 145-1000$ GeV. See their Figs. 8 and 9 for limits in the parameter space of the model.

126 KHACHATRYAN 15BB search for production of a resonance $H$ decaying to $γγ$ in 19.7 fb$^{-1}$ of pp collisions at $E_{cm} = 8$ TeV. See their Fig. 7 for limits on cross section times branching ratio for $m_H = 130-850$ GeV.

127 KHACHATRYAN 15N search for production of $A^0$ decaying to $ZH \to ℓ^+ℓ^−b\bar{b}$ in 19.7 fb$^{-1}$ of pp collisions at $E_{cm} = 8$ TeV. See their Fig. 3 for limits on cross section times branching ratios for $m_{A^0} = 225-600$ GeV.

128 KHACHATRYAN 15O search for production of a high-mass narrow resonance $A^0$ decaying to $ZH \to q\bar{q}\tau^+\tau^−$ in 19.7 fb$^{-1}$ of pp collisions at $E_{cm} = 8$ TeV. See their Fig. 6 for limits on cross section times branching ratios for $m_{A^0} = 800-2500$ GeV.

129 KHACHATRYAN 15R search for a narrow scalar resonance decaying to $HH \to b\bar{b}b\bar{b}$ in 17.9 fb$^{-1}$ of pp collisions at $E_{cm} = 8$ TeV. See their Fig. 5 (top) for limits on cross section times branching ratios for $m_{H_2^0} = 0.27-1.1$ GeV.

130 AAD 14AP search for a second H state decaying to $γγ$ in addition to the state at about 125 GeV in 20.3 fb$^{-1}$ of pp collisions at $E_{cm} = 8$ TeV. See their Fig. 4 for limits on cross section times branching ratio for $m_H = 65-600$ GeV.

131 AAD 14M search for the decay cascade $H_2^0 \to H^±W^∓ \to H^±W^∓\tau^±$, $H$ decaying to $b\bar{b}$ in 20.3 fb$^{-1}$ of pp collisions at $E_{cm} = 8$ TeV. See their Table II for limits on cross section times branching ratio for $m_{H_2^0} = 325-1025$ GeV and $m_{H^±} = 225-925$ GeV.

132 CHATRCHYAN 14G search for a second H state decaying to $WW^(*)$ in addition to the observed signal at about 125 GeV using 4.9 fb$^{-1}$ of pp collisions at $E_{cm} = 7$ TeV and 19.4 fb$^{-1}$ at $E_{cm} = 8$ TeV. See their Fig. 21 (right) for cross section limits in the mass range 110-600 GeV.
133 KHACHATRYAN 14P search for a second H state decaying to γγ in addition to the observed signal at about 125 GeV using 5.1 fb⁻¹ of pp collisions at $E_{cm} = 7$ TeV and 19.7 fb⁻¹ at $E_{cm} = 8$ TeV. See their Figs. 27 and 28 for cross section limits in the mass range 110–150 GeV.

134 AALTONEN 13P search for production of a heavy Higgs boson $H'^0$ that decays into a charged Higgs boson $H^±$ and a lighter Higgs boson $H$ via the decay chain $H'^0 \to H^±W^±, H^± \to W^±H, H^± \to b\bar{b}$ in the final state $ℓν + 4$ jets in 8.7 fb⁻¹ of $p\bar{p}$ collisions at $E_{cm} = 1.96$ TeV. See their Fig. 4 for limits on cross section times branching ratio in the $m_{H^±} = m_{H'^0}$ plane for $m_H = 126$ GeV.

135 CHATRYCHAN 13BJ search for H production in the decay chain $H \to A^0A^0, A^0 \to μ^+μ^- \to 5.3 fb⁻¹$ of pp collisions at $E_{cm} = 7$ TeV. See their Fig. 2 for limits on cross section times branching ratio.

136 AALTONEN 11P search in 2.7 fb⁻¹ of $p\bar{p}$ collisions at $E_{cm} = 1.96$ TeV for the decay chain $t \to bH^+, H^+ \to W^+A^0, A^0 \to τ^+τ^- \to m_{A^0}$ between 4 and 9 GeV. See their Fig. 4 for limits on $B(t \to bH^+) = 90 < m_{H^+} < 160$ GeV.

137 ABBIENDI 10 search for $e^+e^- \to ZH$ with the decay chain $H \to \tilde{\chi}_1^0\tilde{\chi}_1^0, \tilde{\chi}_2^0 \to \tilde{\chi}_1^0(\gamma + \text{or } Z^\gamma)$, when $\tilde{\chi}_1^0$ and $\tilde{\chi}_2^0$ are nearly degenerate. For a mass difference of 2 (4) GeV, a lower limit on $m_H$ of 108.4 (107.0) GeV (95% CL) is obtained for SM ZH cross section and $B(H \to \tilde{\chi}_1^0\tilde{\chi}_1^0) = 1$.

138 SCHAEL 10 search for the process $e^+e^- \to HZ$ followed by the decay chain $H \to A^0A^0 \to τ^+τ^-τ^+τ^- \to Z \to ℓ^+ℓ^-, νν$ at $E_{cm} = 183-209$ GeV. For a HZZ coupling equal to the SM value, $B(H \to A^0A^0) = B(A^0 \to τ^+τ^-) = 1$, and $m_{A^0} = 4-10$ GeV, $m_H$ up to 107 GeV is excluded at 95% CL.

139 ABAZOV 09v search for H production followed by the decay chain $H \to A^0A^0 \to μ^+μ^-μ^+μ^- \to μ^+μ^-τ^+τ^- \to 4.2 fb⁻¹$ of $p\bar{p}$ collisions at $E_{cm} = 1.96$ TeV. See their Fig. 3 for limits on $σ(H)B(H \to A^0A^0)$ for $m_{A^0} = 3.6-19$ GeV.

140 ABBIENDI 05A search for $e^+e^- \to H_1^0A^0$ in general Type-II two-doublet models, with decays $H_1^0, A^0 \to q\bar{q}, gg, τ^+τ^-, \text{and } H_1^0 \to A^0A^0$.

141 ABBIENDI 04K search for $e^+e^- \to HZ$ with H decaying to two jets of any flavor including $gg$. The limit is for SM production cross section with $B(H \to jj) = 1$.

142 ABDALLAH 04 consider the full combined LEP and LEP2 datasets to set limits on the Higgs coupling to W or Z bosons, assuming SM decays of the Higgs. Results in Fig. 26.

143 ACHARD 04B search for $e^+e^- \to HZ$ with H decaying to $b\bar{b}, c\bar{c}, \text{or } gg$. The limit is for SM production cross section with $B(H \to jj) = 1$.

144 ACHARD 04F search for H with anomalous coupling to gauge boson pairs in the processes $e^+e^- \to Hγ, e^+e^-H, HZ$ with decays $H \to f\bar{f}, γγ, Zγ$, and $W^+W$ at $E_{cm} = 189-209$ GeV. See paper for limits.

145 ABBIENDI 03F search for H → anything in $e^+e^- \to HZ$, using the recoil mass spectrum of Z → $e^+e^-$ or $μ^+μ^-$ . In addition, it searched for Z → $νν$ and H → $e^+e^-$ or photons. Scenarios with large width or continuum H mass distribution are considered. See their Figs. 11–14 for the results.

146 ABBIENDI 03G search for $e^+e^- \to H_1^0Z$ followed by $H_1^0A^0, A^0 \to c\bar{c}, gg$, or $τ^+τ^-$ in the region $m_{H_1^0} = 45-86$ GeV and $m_{A^0} = 2-11$ GeV. See their Fig. 7 for the limits.

147 Search for associated production of a γγ resonance with a Z boson, followed by $Z \to q\bar{q}, ℓ^+ℓ^-, \text{or } νν$, at $E_{cm} \le 209$ GeV. The limit is for a H with SM production cross section and $B(H \to f\bar{f})=0$ for all fermions $f$.

148 For $B(H \to γγ)=1$, $m_H > 113.1$ GeV is obtained.

149 HEISTER 02M search for $e^+e^- \to HZ$, assuming that H decays to $q\bar{q}, gg, \text{or } τ^+τ^-$ only. The limit assumes SM production cross section.

150 ABBIENDI 01E search for neutral Higgs bosons in general Type-II two-doublet models, at $E_{cm} \le 189$ GeV. In addition to usual final states, the decays $H_1^0, A^0 \to q\bar{q}, gg$ are searched for. See their Figs. 15,16 for excluded regions.

151 ACCIARRI 00R search for $e^+e^- \to Hγ$ with $H \to b\bar{b}, Zγ, \text{or } γγ$. See their Fig. 3 for limits on $σ \cdot B$. Explicit limits within an effective interaction framework are also given, for which the Standard Model Higgs search results are used in addition.

152 ACCIARRI 00R search for the two-photon type processes $e^+e^- \to e^+e^-H$ with $H \to b\bar{b}$ or $γγ$. See their Fig. 4 for limits on $Γ(H \to γγ)B(H \to γγ \text{ or } b\bar{b})$ for $m_H=70-170$ GeV.

153 GONZALEZ-GARCIA 98B use DØ limit for γγ events with missing $E_T$ in $p\bar{p}$ collisions (ABBOTT 98) to constrain possible ZH or WH production followed by unconventional $H \to γγ$ decay which is induced by higher-dimensional operators. See their Figs. 1 and 2 for limits on the anomalous couplings.

154 KRAWCZYK 97 analyse the muon anomalous magnetic moment in a two-doublet Higgs model (with type II Yukawa couplings) assuming no $H_1^0ZZ$ coupling and obtain $m_{H_1^0} \gtrsim 5$ GeV or $m_{A^0} \gtrsim 5$ GeV for $\tan β > 50$. Other Higgs bosons are assumed to be much heavier.

155 ALEXANDER 96H give $B(Z \to Hγ)×B(H \to q\bar{q}) < 1-4×10^{-5}$ (95%CL) and $B(Z \to Hγ)×B(H \to b\bar{b}) < 0.7-2×10^{-5}$ (95%CL) in the range $20 < m_H < 80$ GeV.

Electroweak Constraints on the Standard Model Higgs Boson Mass

Here we list constraints on the mass of the Higgs boson derived from fits to precision electroweak observables, assuming the minimal Standard Model with a doublet Higgs field and three generations of fermions.

<table><thead><tr><th>VALUE (GeV)</th><th>DOCUMENT ID</th><th>TECN</th></tr></thead><tbody><tr><td>90<sup>+21</sup><sub>-18</sub></td><td>1 HALLER</td><td>18 RVUE</td></tr></tbody></table>

• • • We do not use the following data for averages, fits, limits, etc. • • •

<table><tr><td>91<sup>+30</sup><sub>-23</sub></td><td>2 BAAK</td><td>12 RVUE</td></tr></table>

<table><tr><td>94<sup>+25</sup><sub>-22</sub></td><td>3 BAAK</td><td>12A RVUE</td></tr></table>

<table><tr><td>91<sup>+31</sup><sub>-24</sub></td><td>4 ERLER</td><td>10A RVUE</td></tr></table>

<table><tr><td>129<sup>+74</sup><sub>-49</sub></td><td>5 LEP-SLC</td><td>06 RVUE</td></tr></table>

1 HALLER 18 make Standard Model fits to Z and neutral current parameters, $m_t, m_W$, and $Γ_W$ measurements available in 2018. The direct mass measurement at the LHC is not used in the fit.

2 BAAK 12 make Standard Model fits to Z and neutral current parameters, $m_t, m_W$, and $Γ_W$ measurements available in 2010 (using also preliminary data). The quoted result is obtained from a fit that does not include the limit from the direct Higgs searches. The result including direct search data from LEP2, the Tevatron and the LHC is $120^{+12}_{-5}$ GeV.

3 BAAK 12A make Standard Model fits to Z and neutral current parameters, $m_t, m_W$, and $Γ_W$ measurements available in 2012 (using also preliminary data). The quoted result is obtained from a fit that does not include the measured mass value of the signal observed at the LHC and also no limits from direct Higgs searches.

4 ERLER 10A makes Standard Model fits to Z and neutral current parameters, $m_t, m_W$ measurements available in 2009 (using also preliminary data). The quoted result is obtained from a fit that does not include the limits from the direct Higgs searches. With direct search data from LEP2 and Tevatron added to the fit, the 90% CL (99% CL) interval is 115–148 (114–197) GeV.

5 LEP-SLC 06 make Standard Model fits to Z parameters from LEP/SLC and $m_t, m_W$, and $Γ_W$ measurements available in 2005 with $Δ\alpha^{(5)}_{\text{had}}(m_Z) = 0.02758 \pm 0.00035$. The 95% CL limit is 285 GeV.

SEARCHES FOR NEUTRAL HIGGS BOSONS REFERENCES

<table><tr><td>AAD</td><td>24A PL B848 138394</td><td>G. Aad et al.</td><td>(ATLAS Collab.)</td></tr><tr><td>AAD</td><td>23AD EPJ C83 519</td><td>G. Aad et al.</td><td>(ATLAS Collab.)</td></tr><tr><td>AAD</td><td>23AJ PL C83 603</td><td>G. Aad et al.</td><td>(ATLAS Collab.)</td></tr><tr><td>AAD</td><td>23BD JHEP 2307 199</td><td>G. Aad et al.</td><td>(ATLAS Collab.)</td></tr><tr><td>AAD</td><td>23BE JHEP 2307 200</td><td>G. Aad et al.</td><td>(ATLAS Collab.)</td></tr><tr><td>AAD</td><td>23BG JHEP 2307 203</td><td>G. Aad et al.</td><td>(ATLAS Collab.)</td></tr><tr><td>AAD</td><td>23BW PR D108 092007</td><td>G. Aad et al.</td><td>(ATLAS Collab.)</td></tr><tr><td>AAD</td><td>23BX JHEP 2309 189</td><td>G. Aad et al.</td><td>(ATLAS Collab.)</td></tr><tr><td>AAD</td><td>23CA JHEP 2309 100</td><td>G. Aad et al.</td><td>(ATLAS Collab.)</td></tr><tr><td>AAD</td><td>23CR JHEP 2312 081</td><td>G. Aad et al.</td><td>(ATLAS Collab.)</td></tr><tr><td>AAD</td><td>23D JHEP 2306 016</td><td>G. Aad et al.</td><td>(ATLAS Collab.)</td></tr><tr><td>AAD</td><td>23R JHEP 2307 155</td><td>G. Aad et al.</td><td>(ATLAS Collab.)</td></tr><tr><td>AAD</td><td>23U JHEP 2307 125</td><td>G. Aad et al.</td><td>(ATLAS Collab.)</td></tr><tr><td>AAD</td><td>23V JHEP 2307 104</td><td>G. Aad et al.</td><td>(ATLAS Collab.)</td></tr><tr><td>AAD</td><td>23W JHEP 130 181803</td><td>G. Aad et al.</td><td>(BELLE II Collab.)</td></tr><tr><td>ADACHI</td><td>23A PRL 130 181803</td><td>I. Adachi et al.</td><td>(CMS Collab.)</td></tr><tr><td>HAYRAPETY</td><td>23C PR D108 072004</td><td>A. Hayrapetyan et al.</td><td>(CMS Collab.)</td></tr><tr><td>HAYRAPETY</td><td>23G PRL 2312 070</td><td>A. Hayrapetyan et al.</td><td>(CMS Collab.)</td></tr><tr><td>TUMASYAN</td><td>23 PL B842 137392</td><td>A. Tumasyan et al.</td><td>(CMS Collab.)</td></tr><tr><td>TUMASYAN</td><td>23AR JHEP 131 101801</td><td>A. Tumasyan et al.</td><td>(CMS Collab.)</td></tr><tr><td>TUMASYAN</td><td>23M JHEP 2307 148</td><td>A. 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Aad et al.</td><td>(ATLAS Collab.)</td></tr><tr><td>ABRATENKO</td><td>21C PR D106 151803</td><td>P. Abratenko et al.</td><td>(MicroBooNE Collab.)</td></tr><tr><td>SIRUNYAN</td><td>21A EPJ C81 13</td><td>A. Sirunyan et al.</td><td>(CMS Collab.)</td></tr><tr><td>Also</td><td>EPJ C81 333 (errat.)</td><td>A. Sirunyan et al.</td><td>(CMS Collab.)</td></tr><tr><td>SLAVICH</td><td>21A EPJ C81 450</td><td>P. Slavich et al.</td><td>(CMS Collab.)</td></tr><tr><td>TUMASYAN</td><td>21F JHEP 2111 057</td><td>G. Aad et al.</td><td>(ATLAS Collab.)</td></tr><tr><td>AAD</td><td>21G PL D120 012002</td><td>G. Aad et al.</td><td>(ATLAS Collab.)</td></tr><tr><td>AAD</td><td>20AA PRL 125 051801</td><td>G. Aad et al.</td><td>(ATLAS Collab.)</td></tr><tr><td>AAD</td><td>20AE PRL 125 221802</td><td>G. Aad et al.</td><td>(ATLAS Collab.)</td></tr><tr><td>AAD</td><td>20AI PR D120 112006</td><td>G. Aad et al.</td><td>(ATLAS Collab.)</td></tr><tr><td>AAD</td><td>20AO JHEP 2011 163</td><td>G. Aad et al.</td><td>(ATLAS Collab.)</td></tr><tr><td>AAD</td><td>20C PL B800 135103</td><td>G. Aad et al.</td><td>(ATLAS Collab.)</td></tr><tr><td>AAD</td><td>20D PR D105 032004</td><td>G. Aad et al.</td><td>(ATLAS Collab.)</td></tr><tr><td>AAD</td><td>20X JHEP 2007 108</td><td>G. Aad et al.</td><td>(ATLAS Collab.)</td></tr><tr><td>Also</td><td>JHEP 2101 145 (errat.)</td><td>G. Aad et al.</td><td>(ATLAS Collab.)</td></tr><tr><td>Also</td><td>JHEP 2105 207 (errat.)</td><td>G. Aad et al.</td><td>(ATLAS Collab.)</td></tr><tr><td>AAL</td><td>20AL JHEP 2010 156</td><td>R. Aalij et al.</td><td>(LHCb Collab.)</td></tr><tr><td>SIRUNYAN</td><td>20AA JHEP 2003 055</td><td>A. M. Sirunyan et al.</td><td>(CMS Collab.)</td></tr><tr><td>SIRUNYAN</td><td>20AC JHEP 2003 065</td><td>A. M. Sirunyan et al.</td><td>(CMS Collab.)</td></tr><tr><td>SIRUNYAN</td><td>20AD JHEP 2003 103</td><td>A. M. Sirunyan et al.</td><td>(CMS Collab.)</td></tr><tr><td>SIRUNYAN</td><td>20AF JHEP 2004 171</td><td>A. M. Sirunyan et al.</td><td>(CMS Collab.)</td></tr><tr><td>SIRUNYAN</td><td>20AP JHEP 2008 139</td><td>A. M. Sirunyan et al.</td><td>(CMS Collab.)</td></tr><tr><td>SIRUNYAN</td><td>20B JHEP 2003 034</td><td>A. M. Sirunyan et al.</td><td>(CMS Collab.)</td></tr><tr><td>SIRUNYAN</td><td>20Z JHEP 2003 051</td><td>A. M. Sirunyan et al.</td><td>(CMS Collab.)</td></tr><tr><td>AABOUD</td><td>19A JHEP 1901 030</td><td>M. Aaboud et al.</td><td>(ATLAS Collab.)</td></tr><tr><td>AABOUD</td><td>19AG PL B790 1</td><td>M. Aaboud et al.</td><td>(ATLAS Collab.)</td></tr><tr><td>AABOUD</td><td>19AI PL B793 499</td><td>M. Aaboud et al.</td><td>(ATLAS Collab.)</td></tr><tr><td>AABOUD</td><td>19O JHEP 1904 092</td><td>M. Aaboud et al.</td><td>(ATLAS Collab.)</td></tr><tr><td>AABOUD</td><td>19T JHEP 1905 124</td><td>M. Aaboud et al.</td><td>(ATLAS Collab.)</td></tr><tr><td>AABOUD</td><td>19V JHEP 1905 142</td><td>M. Aaboud et al.</td><td>(ATLAS Collab.)</td></tr><tr><td>AABOUD</td><td>19Y JHEP 1907 117</td><td>M. Aaboud et al.</td><td>(ATLAS Collab.)</td></tr><tr><td>AABOUD</td><td>19Z JHEP 1907 121</td><td>M. Aaboud et al.</td><td>(ATLAS Collab.)</td></tr><tr><td>AALTONEN</td><td>19 PR D99 052001</td><td>T. Aaltonen et al.</td><td>(CDF Collab.)</td></tr><tr><td>BAGNASCHI</td><td>19 EPJ C79 617</td><td>E. Bagnaschi et al.</td><td>(ATLAS Collab.)</td></tr><tr><td>SIRUNYAN</td><td>19 PL B788 7</td><td>A. M. Sirunyan et al.</td><td>(CMS Collab.)</td></tr><tr><td>SIRUNYAN</td><td>19AE JHEP 1905 210</td><td>A. M. Sirunyan et al.</td><td>(CMS Collab.)</td></tr><tr><td>SIRUNYAN</td><td>19AN EPJ C79 280</td><td>A. M. Sirunyan et al.</td><td>(CMS Collab.)</td></tr><tr><td>SIRUNYAN</td><td>19AV EPJ C79 564</td><td>A. M. Sirunyan et al.</td><td>(CMS Collab.)</td></tr><tr><td>SIRUNYAN</td><td>19B PR D99 012005</td><td>A. M. Sirunyan et al.</td><td>(CMS Collab.)</td></tr><tr><td>SIRUNYAN</td><td>19BD PL D99 320</td><td>A. M. Sirunyan et al.</td><td>(CMS Collab.)</td></tr><tr><td>SIRUNYAN</td><td>19BD PL B795 398</td><td>A. M. Sirunyan et al.</td><td>(CMS Collab.)</td></tr><tr><td>SIRUNYAN</td><td>19BE PRL 122 121803</td><td>A. M. Sirunyan et al.</td><td>(CMS Collab.)</td></tr><tr><td>SIRUNYAN</td><td>19BQ PL B796 131</td><td>A. M. Sirunyan et al.</td><td>(CMS Collab.)</td></tr><tr><td>SIRUNYAN</td><td>19CR PL B798 134992</td><td>A. M. Sirunyan et al.</td><td>(CMS Collab.)</td></tr><tr><td>SIRUNYAN</td><td>19D PR D101 040</td><td>A. M. Sirunyan et al.</td><td>(CMS Collab.)</td></tr><tr><td>AABOUD</td><td>18AA PR D98 032015</td><td>M. Aaboud et al.</td><td>(ATLAS Collab.)</td></tr><tr><td>AABOUD</td><td>18AG PL B782 750</td><td>M. Aaboud et al.</td><td>(ATLAS Collab.)</td></tr><tr><td>AABOUD</td><td>18AH PL B783 392</td><td>M. Aaboud et al.</td><td>(ATLAS Collab.)</td></tr></table>
Searches in $e^{+}e^{-}$ collisions at and above the Z pole have conclusively ruled out the existence of a charged Higgs in the region $m_{H^{+}} \sim \sim 45$ GeV, and are meanwhile superseded by the searches in higher energy $e^{+}e^{-}$ collisions at LEP. Results that are by now obsolete are therefore not included in this compilation, and can be found in a previous Edition (The European Physical Journal C15 1 (2000)) of this Review.

In the following, and unless otherwise stated, results from the LEP experiments (ALEPH, DELPHI, L3, and OPAL) are assumed to derive from the study of the $e^{+}e^{-} \to H^{+}H^{-}$ process. Limits from $b \to s\gamma$ decays are usually stronger in generic 2HDM models than in Supersymmetric models.

<table><thead><tr><th>VALUE (GeV)</th><th>CL%</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>none 80-140</td><td>95</td><td>1 AAD</td><td>15AF ATLS</td><td>t → bH<sup>+</sup></td></tr><tr><td>none 90-155</td><td>95</td><td>2 KHACHATRY...15AX CMS</td><td></td><td>t → bH<sup>+</sup>, H<sup>+</sup> → τ<sup>+</sup>ν</td></tr><tr><td>&gt; 80</td><td>95</td><td>3 LEP</td><td>13 LEP</td><td>e<sup>+e<sup>-</sup></sup> → H<sup>+</sup> H<sup>-</sup>, E<sub>cm</sub> ≤ 209GeV</td></tr><tr><td>&gt; 76.3</td><td>95</td><td>4 ABBIENDI</td><td>12 OPAL</td><td>e<sup>+e<sup>-</sup></sup> → H<sup>+</sup> H<sup>-</sup>, E<sub>cm</sub> ≤ 209GeV</td></tr><tr><td>&gt; 74.4</td><td>95</td><td>ABDALLAH</td><td>04I DLPH</td><td>E<sub>cm</sub> ≤ 209 GeV</td></tr><tr><td>&gt; 76.5</td><td>95</td><td>ACHARD</td><td>03E L3</td><td>E<sub>cm</sub> ≤ 209 GeV</td></tr><tr><td>&gt; 79.3</td><td>95</td><td>HEISTER</td><td>02P ALEP</td><td>E<sub>cm</sub> ≤ 209 GeV</td></tr></tbody></table>

• • • We do not use the following data for averages, fits, limits, etc. • • •

<table><tbody><tr><td></td><td>5 AAD</td><td>23AH ATLS</td><td>H<sup>±</sup> → W<sup>±</sup>Z</td></tr><tr><td></td><td>6,7 AAD</td><td>23BB ATLS</td><td>t → bH<sup>+</sup>, H<sup>+</sup> → c<span style="text-decoration: overline">b</span></td></tr><tr><td></td><td>7,8 AAD</td><td>23BW ATLS</td><td>t → bH<sup>+</sup>, H<sup>+</sup> → W<sup>+</sup>A<sup>0</sup>, A<sup>0</sup> → μ<sup>+</sup>μ<sup>-</sup></td></tr><tr><td></td><td>9 TUMASYAN</td><td>23AV CMS</td><td>H<sup>±</sup> → H<sub>2</sub><sup>0</sup>W<sup>±</sup></td></tr><tr><td></td><td>10 TUMASYAN</td><td>22B CMS</td><td>H<sup>±</sup> → W<sup>±</sup>γ</td></tr><tr><td></td><td>11 AAD</td><td>21V ATLS</td><td><span style="text-decoration: overline">t</span>bH<sup>+</sup>, H<sup>+</sup> → t<span style="text-decoration: overline">b</span></td></tr><tr><td></td><td>12 SIRUNYAN</td><td>21W ATLS</td><td>H<sup>+</sup> → W<sup>+</sup>Z</td></tr><tr><td></td><td>13 AAD</td><td>20W ATLS</td><td>H<sup>+</sup> → t<span style="text-decoration: overline">b</span></td></tr><tr><td></td><td>14 SIRUNYAN</td><td>20AO CMS</td><td>H<sup>+</sup> → t<span style="text-decoration: overline">b</span></td></tr><tr><td></td><td>15 SIRUNYAN</td><td>20AV CMS</td><td>H<sup>+</sup> → t<span style="text-decoration: overline">b</span></td></tr><tr><td></td><td>16 SIRUNYAN</td><td>20BE CMS</td><td>t → bH<sup>+</sup>, H<sup>+</sup> → c<span style="text-decoration: overline">b</span></td></tr><tr><td></td><td>17 SIRUNYAN</td><td>19AH CMS</td><td>H<sup>+</sup> → τ<sup>+</sup>ν</td></tr><tr><td></td><td>18 SIRUNYAN</td><td>19BP CMS</td><td>H<sup>+</sup> → W<sup>+</sup>Z</td></tr><tr><td></td><td>19 SIRUNYAN</td><td>19CC CMS</td><td>t → bH<sup>+</sup>, H<sup>+</sup> → W<sup>+</sup>A<sup>0</sup>, A<sup>0</sup> → μ<sup>+</sup>μ<sup>-</sup></td></tr><tr><td></td><td>20 SIRUNYAN</td><td>19CQ CMS</td><td>H<sup>+</sup> → W<sup>+</sup>Z</td></tr><tr><td></td><td>21 AABOUD</td><td>18BW ATLS</td><td><span style="text-decoration: overline">t</span>bH<sup>+</sup> or t → bH<sup>+</sup>, H<sup>+</sup> → τ<sup>+</sup>ν</td></tr><tr><td></td><td>22 AABOUD</td><td>18CD ATLS</td><td><span style="text-decoration: overline">t</span>bH<sup>+</sup>, H<sup>+</sup> → t<span style="text-decoration: overline">b</span></td></tr><tr><td></td><td>23 AABOUD</td><td>18CH ATLS</td><td>H<sup>±</sup> → W<sup>±</sup>Z</td></tr><tr><td></td><td>24 HALLER</td><td>18 RVUE</td><td>b → sγ</td></tr><tr><td></td><td>25 SIRUNYAN</td><td>18D0 CMS</td><td>t → bH<sup>+</sup>, H<sup>+</sup> → c<span style="text-decoration: overline">b</span></td></tr><tr><td></td><td>26 MISIAK</td><td>17 RVUE</td><td>b → s(d)γ</td></tr><tr><td></td><td>27 SIRUNYAN</td><td>17AE CMS</td><td>H<sup>±</sup> → W<sup>±</sup>Z</td></tr><tr><td></td><td>28 AABOUD</td><td>16A ATLS</td><td>t(b) H<sup>+</sup>, H<sup>+</sup> → τ<sup>+</sup>ν</td></tr><tr><td></td><td>29 AAD</td><td>16AJ ATLS</td><td>t(b) H<sup>+</sup>, H<sup>+</sup> → t<span style="text-decoration: overline">b</span></td></tr><tr><td></td><td>30 AAD</td><td>16AJ ATLS</td><td>qq → H<sup>+</sup>, H<sup>+</sup> → t<span style="text-decoration: overline">b</span></td></tr><tr><td></td><td>31 AAD</td><td>15AF ATLS</td><td>tH<sup>±</sup></td></tr><tr><td></td><td>32 AAD</td><td>15M ATLS</td><td>H<sup>±</sup> → W<sup>±</sup>Z</td></tr><tr><td></td><td>33 KHACHATRY...15AX CMS</td><td></td><td>tH<sup>+</sup>, H<sup>+</sup> → t<span style="text-decoration: overline">b</span></td></tr><tr><td></td><td>34 KHACHATRY...15AX CMS</td><td></td><td>tH<sup>±</sup>, H<sup>±</sup> → τ<sup>±</sup>ν</td></tr><tr><td></td><td>35 KHACHATRY...15BF CMS</td><td></td><td>t → bH<sup>+</sup>, H<sup>+</sup> → c<span style="text-decoration: overline">b</span></td></tr><tr><td></td><td>36 AAD</td><td>14M ATLS</td><td>H<sub>2</sub><sup>0</sup> → H<sup>±</sup>W<sup>±</sup> → H<sup>0</sup>W<sup>±</sup>W<sup>±</sup>, H<sup>0</sup> → b<span style="text-decoration: overline">b</span></td></tr><tr><td></td><td>37 AALTONEN</td><td>14A CDF</td><td>t → bτν</td></tr><tr><td></td><td>38 AAD</td><td>13AC ATLS</td><td>t → bH<sup>+</sup></td></tr><tr><td></td><td>39 AAD</td><td>13V ATLS</td><td>t → bH<sup>+</sup>, lepton non-universality</td></tr><tr><td></td><td>40 AAD</td><td>12BH ATLS</td><td>t → bH<sup>+</sup></td></tr><tr><td></td><td>41 CHATRCHYAN 12AA CMS</td><td></td><td>t → bH<sup>+</sup></td></tr><tr><td></td><td>42 AALTONEN 11P CDF</td><td></td><td>t → bH<sup>+</sup>, H<sup>+</sup> → W<sup>+</sup>A<sup>0</sup></td></tr><tr><td></td><td>43 DESCHAMPS 10 RVUE</td><td></td><td>Type II, flavor physics data</td></tr><tr><td></td><td>44 AALTONEN 09AJ CDF</td><td>t → bH<sup>+</sup></td><td></td></tr><tr><td></td><td>45 ABAZOV</td><td>09AC D0</td><td>t → bH<sup>+</sup></td></tr><tr><td></td><td>46 ABAZOV</td><td>09AG D0</td><td>t → bH<sup>+</sup></td></tr><tr><td></td><td>47 ABAZOV</td><td>09AI D0</td><td>t → bH<sup>+</sup></td></tr><tr><td></td><td>48 ABAZOV</td><td>09P D0</td><td>H<sup>+</sup> → t<span style="text-decoration: overline">b</span></td></tr><tr><td></td><td>49 ABULENCIA</td><td>06E CDF</td><td>t → bH<sup>+</sup></td></tr><tr><td></td><td>50 ABDALLAH 04I DLPH</td><td></td><td>B(τν) = 1</td></tr><tr><td></td><td>51 ABBIENDI 03 OPAL</td><td></td><td>τ → μ<span style="text-decoration: overline">ν</span>, e<span style="text-decoration: overline">ν</span>ν</td></tr><tr><td></td><td>52 ABAZOV</td><td>02B D0</td><td>t → bH<sup>+</sup>, H → τν</td></tr><tr><td></td><td>53 BORZUMATI 02V RVUE</td><td></td><td></td></tr><tr><td></td><td>54 ABBIENDI 01Q OPAL</td><td>B → τν<sub>T</sub>X</td><td></td></tr><tr><td></td><td>55 BARATE 01E ALEP</td><td>B → τν<sub>T</sub></td><td></td></tr><tr><td></td><td>56 GAMBINO 01 RVUE</td><td>b → sγ</td><td></td></tr><tr><td></td><td>57 AFFOLDER 00I CDF</td><td>t → bH<sup>+</sup>, H → τν</td><td></td></tr><tr><td></td><td>58 ABBOTT 99E D0</td><td></td><td>t → bH<sup>+</sup></td></tr><tr><td></td><td>59 ACKERSTAFF 99D OPAL</td><td></td><td>τ → eνν, μνν</td></tr><tr><td></td><td>60 ACCIARRI 97F L3</td><td>B → τν<sub>T</sub></td><td></td></tr><tr><td></td><td>61 AMMAR 97B CLEO</td><td>τ → μνν</td><td></td></tr></tbody></table>

<table><tbody><tr><td>62 COARASA</td><td>97 RVUE B → τν<sub>T</sub>X</td></tr><tr><td>63 GUCHAIT</td><td>97 RVUE t → bH<sup>+</sup>, H → τν</td></tr><tr><td>64 MANGANO</td><td>97 RVUE B<sub>u(c)</sub> → τν<sub>T</sub></td></tr><tr><td>65 STAHL</td><td>97 RVUE τ → μνν</td></tr><tr><td>66 ALAM</td><td>95 CLE2 b → sγ</td></tr><tr><td>67 BUSKULIC</td><td>95 ALEP b → τν<sub>T</sub>X</td></tr></tbody></table>

>244 95

1 AAD 15AF search for $t\bar{t}$ production followed by $t \to bH^{+}$, $H^{+} \to \tau^{+}\nu$ in 19.5 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 8$ TeV. Upper limits on $B(t \to bH^{+}) B(H^{+} \to \tau\nu)$ between $2.3 \times 10^{-3}$ and $1.3 \times 10^{-2}$ (95% CL) are given for $m_{H^{+}} = 80-160$ GeV. See their Fig. 8 for the excluded regions in different benchmark scenarios of the MSSM. The region $m_{H^{+}} < 140$ GeV is excluded for $\tan\beta > 1$ in the considered scenarios.

2 KHACHATRYAN 15AX search for $t\bar{t}$ production followed by $t \to bH^{+}$, $H^{+} \to \tau^{+}\nu$ in 19.7 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 8$ TeV. Upper limits on $B(t \to bH^{+}) B(H^{+} \to \tau\nu)$ between $1.2 \times 10^{-2}$ and $1.5 \times 10^{-3}$ (95% CL) are given for $m_{H^{+}} = 80-160$ GeV. See their Fig. 11 for the excluded regions in different benchmark scenarios of the MSSM. The region $m_{H^{+}} < 155$ GeV is excluded for $\tan\beta > 1$ in the considered scenarios.

3 LEP 13 give a limit that refers to the Type II scenario. The limit for $B(H^{+} \to \tau\nu) = 1$ is 94 GeV (95% CL), and for $B(H^{+} \to c\bar{s}) = 1$ the region below 80.5 as well as the region 83-88 GeV is excluded (95% CL). LEP 13 also search for the decay mode $H^{+} \to A^{0}W^{+}$ with $A^{0} \to b\bar{b}$, which is not negligible in Type I models. The limit in Type I models is 72.5 GeV (95% CL) if $m_{A^{0}} > 12$ GeV.

4 ABBIENDI 12 also search for the decay mode $H^{+} \to A^{0}W^{+}$ with $A^{0} \to b\bar{b}$.

5 AAD 23AH search for vector boson fusion production of $H^{\pm}$ decaying to $H^{\pm} \to W^{\pm}Z \to \ell^{\pm}\nu\ell^{\pm}\ell^{-}$ in 139 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. See their Fig. 9 for limits on cross section times branching ratio in the Georgi-Machacek model for $m_{H^{+}} = 0.2-1.0$ TeV, and also for limits on the triplet vacuum expectation value fraction.

6 AAD 23BB search for $t\bar{t}$ production followed by $t \to bH^{+}$, $H^{+} \to c\bar{b}$ in 139 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. See their Fig. 8 for limits on the product of branching ratios for $m_{H^{+}} = 60-160$ GeV.

7 Charge conjugated states are also implied.

8 AAD 23BW search for $t \to bH^{+}$ from pair produced top quarks, with the decay chain $H^{+} \to W^{+}A^{0}$, $A^{0} \to \mu^{+}\mu^{-}$ using 139 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. See their Fig. 5(b)-(d) for limits on the product of branching ratios for $m_{H^{+}} = 120, 140, 160$ GeV, and $m_{A^{0}} = 15-72$ GeV.

9 TUMASYAN 23AV search for production of $H^{\pm}$ in association with a top quark, decaying to $H_2^0 W^{\pm}$, $H_2^0 \to \tau^{+}\tau^{-}$, using 138 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. See their Fig. 9 for limits on production cross section times branching ratios for $m_{H^{\pm}} = 0.3-0.7$ TeV and $m_{H_2^0} = 0.2$ TeV.

10 TUMASYAN 22B search for production of scalar resonance decaying to $W^{\pm}\gamma \to q\bar{q}\gamma$ in 137 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. See their Fig. 5 for limits on cross section times branching ratio for the mass range 0.7-6.0 TeV, assuming narrow width or $\Gamma/M = 0.05$.

11 AAD 21V search for $t\bar{b}H^{+}$ associated production followed by $H^{+} \to t\bar{b}$ in 139 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. See their Fig. 6 for upper limits on cross section times branching ratio for $m_{H^{+}} = 0.2-2$ TeV. See also their Fig. 7 for the excluded region in the parameter space of the hMSSM and the following MSSM benchmark scenarios: $M_h^{125}$, $M_h^{125}(\bar{\chi})$, $M_h^{125}(\bar{\tau})$, $M_h^{125}(\text{alignment})$, $M_h^{125}(\text{CPV})$.

12 SIRUNYAN 21W search for vector boson fusion production of $H^{+}$ decaying to $H^{+} \to W^{+}Z \to \ell^{+}\nu\ell^{+}\ell^{-}$ in 137 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. See their Fig. 8 for limits on cross section times branching ratio for $m_{H^{+}} = 0.2-3$ TeV, and also for limits on the fraction of the triplet vev contribution to the W mass in the Georgi-Machacek model.

13 AAD 20W search for dijet resonances in events with isolated leptons using 139 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. As a byproduct, $H^{+} \to t\bar{b}$ produced in association with $t\bar{b}$ is searched for. Limits on the product of cross section times branching ratio for $m_{H^{+}} = 0.6-2$ TeV are given in their Fig. 5(c).

14 SIRUNYAN 20AO search for $H^{+} \to t\bar{b}$ produced in association with $t(b)$ in all jet final states in 35.9 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. See their Fig. 6 for limits on the product of cross section times branching ratio for $m_{H^{+}} = 0.2-3$ TeV. Limits for s-channel production are also given for $m_{H^{+}} = 0.8-3$ TeV. See also Fig. 7 for the corresponding limits in scenarios in the minimal supersymmetric standard model. Cross section limits from combined results with SIRUNYAN 20AV are given in Fig. 8.

15 SIRUNYAN 20AV search for $H^{+} \to t\bar{b}$ produced in association with $t(b)$ in final states with one or two leptons, in 35.9 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. See their Fig. 5. for limits on the product of cross section times branching ratio for $m_{H^{+}} = 0.2-3$ TeV, and their Fig. 6 for the corresponding limits in scenarios in the minimal supersymmetric standard model.

16 SIRUNYAN 20BE search for $t \to bH^{+}$ followed by the decay $H^{+} \to c\bar{s}$ in pair produced top quark events using 35.9 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. Limits on the branching ratio in the range 1.68-0.25% (95%CL) are given for $m_{H^{+}} = 80-160$ GeV, see their Fig. 4.

17 SIRUNYAN 19AH search for $H^{+}$ in the decay of a pair-produced $t$ quark, or in associated $t b H^{+}$ or nonresonant $b\bar{b}H^{+}W^{-}$ production, followed by $H^{+} \to \tau^{+}\nu$, in 35.9 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. Upper limits on cross section times branching ratio between 6 pb and 5 fb (95% CL) are given for $m_{H^{+}} = 80-3000$ GeV (including the non-resonant production near the top quark mass), see their Fig. 6 (left). See their Fig. 6 (right) for the excluded regions in the $m_{H^{+}}^{\text{mod}}$ scenario of the MSSM.

18 SIRUNYAN 19BP search for vector boson fusion production of $H^{+}$ decaying to $H^{+} \to W^{+}Z \to \ell^{+}\nu\ell^{+}\ell^{-}$ in 35.9 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. See their Fig. 7 for limits on cross section times branching ratio for $m_{H^{+}} = 0.3-2.0$ TeV, and also for limits on the fraction of the triplet vev contribution to the W mass in the Georgi-Machacek model.

19 SIRUNYAN 19CC search for $t \to bH^{+}$ from pair produced top quarks, with the decay chain $H^{+} \to W^{+}A^{0}$, $A^{0} \to \mu^{+}\mu^{-}$ in 35.9 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. See their Fig. 2 for limits on the product of branching ratios for $m_{A^{0}} = 15-75$ GeV.
Gauge & Higgs Boson Particle Listings
Charged Higgs Bosons ($H^{\pm}$ and $H^{\pm\pm}$), Searches for

20 SIRUNYAN 19CQ search for vector boson fusion production of $H^{\pm}$ decaying to $H^{\pm} \to W^{\pm}Z \to t^{\pm} \nu q \bar{q} \ell^{\pm} \ell^{-}$ in 35.9 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. See their Fig. 5 for limits on cross section times branching ratio for $m_{H^{\pm}} = 0.6-2.0$ TeV, and also for limits on the triplet vacuum expectation value fraction in the Georgi-Machacek model.

21 AABOUD 18BW search for $t\bar{t}bH^{+}$ associated production or the decay $t \to bH^{+}$, followed by $H^{+} \to \tau^{+} \nu$, in 36.1 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. See their Fig. 8(a) for upper limits on cross section times branching ratio for $m_{H^{+}} = 90-2000$ GeV, and Fig. 8(b) for limits on $B(t \to bH^{+})$ $B(H^{+} \to \tau^{+} \nu)$ for $m_{H^{+}} = 90-160$ GeV. See also their Fig. 9 for the excluded region in the parameter space of the $m_{h}^{\text{mod}}$- and hMSSM scenarios of the MSSM. The theory predictions overlaid to the experimental limits to determine the excluded $m_{H^{+}}$ range are shown without their respective uncertainty band.

22 AABOUD 18CD search for $t\bar{t}bH^{+}$ associated production followed by $H^{+} \to t\bar{b}$ in 36.1 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. See their Fig. 8 for upper limits on cross section times branching ratio for $m_{H^{+}} = 0.2-2$ TeV. See also their Fig. 9 for the excluded region in the parameter space of the $m_{h}^{\text{mod}}$- and hMSSM scenarios of the MSSM. The theory predictions overlaid to the experimental limits to determine the excluded $m_{H^{+}}$ range are shown without their respective uncertainty band.

23 AABOUD 18CH search for vector boson fusion production of $H^{\pm}$ decaying to $H^{\pm} \to W^{\pm}Z \to t^{\pm} \nu \ell^{\pm} \ell^{-}$ in 36.1 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. See their Fig. 7 for limits on cross section times branching ratio for $m_{H^{+}} = 0.2-0.9$ TeV, and also for limits on the triplet vacuum expectation value fraction in the Georgi-Machacek model.

24 HALLER 18 give 95% CL lower limits on $m_{H^{+}}$ of 590 GeV in type II two Higgs doublet model from combined data (including an unpublished BELLE result) for $B(b \to s\gamma)$.

25 SIRUNYAN 18DQ search for $t\bar{t} production followed by $t \to bH^{+}$, $H^{+} \to c\bar{b}$ in 19.7 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 8$ TeV. See their Fig. 3 for upper limits on $B(t \to bH^{+})$ for $m_{H^{+}} = 90-150$ GeV assuming that $B(H^{+} \to c\bar{b}) = 1$ and $B(t \to bH^{+}) + B(t \to bW^{+}) = 1$.

26 MISIAK 17 give 95% CL lower limits on $m_{H^{+}}$ between 570 and 800 GeV in type II two Higgs doublet model from combined data (including an unpublished BELLE result) for $B(b \to s(d\gamma))$.

27 SIRUNYAN 17AE search for vector boson fusion production of $H^{\pm}$ decaying to $H^{\pm} \to W^{\pm}Z \to t^{\pm} \nu \ell^{\pm} \ell^{-}$ in 15.2 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. See their Fig. 3 for limits on cross section times branching ratio for $m_{H^{\pm}} = 0.2-2.0$ TeV, and also for limits on the triplet vacuum expectation value fraction in the Georgi-Machacek model.

28 AABOUD 16A search for $t(b) H^{\pm}$ associated production followed by $H^{+} \to \tau^{+} \nu$ in 3.2 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. Upper limits on $\sigma(t(b) H^{\pm})$ $B(H^{+} \to \tau \nu)$ between 1.9 pb and 15 fb (95% CL) are given for $m_{H^{+}} = 200-2000$ GeV, see their Fig. 6. See their Fig. 7 for the excluded regions in the hMSSM scenario.

29 AAD 16AJ search for $t(b) H^{\pm}$ associated production followed by $H^{\pm} \to t b$ in 20.3 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 8$ TeV. See their Fig. 6 for upper limits on $\sigma(t(b) H^{\pm})$ $B(H^{+} \to t b)$ for $m_{H^{+}} = 200-600$ GeV.

30 AAD 16AJ search for $H^{\pm}$ production from quark-antiquark annihilation, followed by $H^{\pm} \to t b$, in 20.3 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 8$ TeV. See their Fig. 10 for upper limits on $\sigma(H^{\pm})$ $B(H^{+} \to t b)$ for $m_{H^{+}} = 400-3000$ GeV.

31 AAD 15AF search for $t H^{\pm}$ associated production followed by $H^{\pm} \to \tau^{\pm} \nu$ in 19.5 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 8$ TeV. Upper limits on $\sigma(t H^{\pm})$ $B(H^{+} \to \tau \nu)$ between 760 and 4.5 fb (95% CL) are given for $m_{H^{+}} = 180-1000$ GeV. See their Fig. 8 for the excluded regions in different benchmark scenarios of the MSSM.

32 AAD 15M search for vector boson fusion production of $H^{\pm}$ decaying to $H^{\pm} \to W^{\pm}Z \to q\bar{q}\ell^{\pm} \ell^{-}$ in 20.3 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 8$ TeV. See their Fig. 2 for limits on cross section times branching ratio for $m_{H^{\pm}} = 200-1000$ GeV, and Fig. 3 for limits on the triplet vacuum expectation value fraction in the Georgi-Machacek model.

33 KHACHATRYAN 15AX search for $t H^{\pm}$ associated production followed by $H^{\pm} \to t b$ in 19.7 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 8$ TeV. Upper limits on $\sigma(t H^{\pm})$ $B(H^{+} \to t \bar{b})$ between 2.0 and 0.13 pb (95% CL) are given for $m_{H^{+}} = 180-600$ GeV. See their Fig. 11 for the excluded regions in different benchmark scenarios of the MSSM.

34 KHACHATRYAN 15AX search for $t H^{\pm}$ associated production followed by $H^{\pm} \to \tau^{\pm} \nu$ in 19.7 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 8$ TeV. Upper limits on $\sigma(t H^{\pm})$ $B(H^{+} \to \tau \nu)$ between 380 and 25 fb (95% CL) are given for $m_{H^{+}} = 180-600$ GeV. See their Fig. 11 for the excluded regions in different benchmark scenarios of the MSSM.

35 KHACHATRYAN 15BF search for $t\bar{t}$ production followed by $t \to bH^{+}$, $H^{+} \to c\bar{s}$ in 19.7 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 8$ TeV. Upper limits on $B(t \to bH^{+})$ $B(H^{+} \to c\bar{s})$ between 1.2 $\times 10^{-2}$ and 6.5 $\times 10^{-2}$ (95% CL) are given for $m_{H^{+}} = 90-160$ GeV.

36 AAD 14M search for the decay cascade $H_0^2 \to H^{\pm} W^{\mp} \to H^0 W^{\pm} W^{\mp}$, $H^0$ decaying to $b\bar{b}$ in 20.3 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 8$ TeV. See their Table III for limits on cross section times branching ratio for $m_{H_0^2} = 325-1025$ GeV and $m_{H^{+}} = 225-925$ GeV.

37 AALTONEN 14A measure $B(t \to b\nu\tau) = 0.096 \pm 0.028$ using 9 fb$^{-1}$ of $p\bar{p}$ collisions at $E_{cm} = 1.96$ TeV. For $m_{H^{+}} = 80-140$ GeV, this measured value is translated to a limit $B(t \to bH^{+}) < 0.059$ at 95% CL assuming $B(H^{+} \to \tau^{+} \nu) = 1$.

38 AAD 13AC search for $t\bar{t}$ production followed by $t \to bH^{+}$, $H^{+} \to c\bar{s}$ (flavor unidentified) in 4.7 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 7$ TeV. Upper limits on $B(t \to bH^{+})$ between 0.05 and 0.01 (95% CL) are given for $m_{H^{+}} = 90-150$ GeV and $B(H^{+} \to c\bar{s}) = 1$.

39 AAD 13V search for $t\bar{t}$ production followed by $t \to bH^{+}$, $H^{+} \to \tau^{+} \nu$ through violation of lepton universality with 4.6 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 7$ TeV. Upper limits on $B(t \to bH^{+})$ between 0.032 and 0.044 (95% CL) are given for $m_{H^{+}} = 90-140$ GeV and $B(H^{+} \to \tau^{+} \nu) = 1$. By combining with AAD 12BH, the limits improve to 0.008 to 0.034 for $m_{H^{+}} = 90-160$ GeV. See their Fig. 7 for the excluded region in the $m_{h}^{\text{max}}$ scenario of the MSSM.

40 AAD 12BH search for $t\bar{t}$ production followed by $t \to bH^{+}$, $H^{+} \to \tau^{+} \nu$ with 4.6 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 7$ TeV. Upper limits on $B(t \to bH^{+})$ between 0.01 and 0.05 (95% CL) are given for $m_{H^{+}} = 90-160$ GeV and $B(H^{+} \to \tau^{+} \nu) = 1$. See their Fig. 8 for the excluded region in the $m_{h}^{\text{max}}$ scenario of the MSSM.

41 CHATRCHYAN 12AA search for $t\bar{t}$ production followed by $t \to bH^{+}$, $H^{+} \to \tau^{+} \nu$ with 2 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 7$ TeV. Upper limits on $B(t \to bH^{+})$ between 0.019 and 0.041 (95% CL) are given for $m_{H^{+}} = 80-160$ GeV and $B(H^{+} \to \tau^{+} \nu) = 1$.

42 AALTONEN 11P search in 2.7 fb$^{-1}$ of $p\bar{p}$ collisions at $E_{cm} = 1.96$ TeV for the decay chain $t \to bH^{+}$, $H^{+} \to W^{+} A^{0}$, $A^{0} \to \tau^{+} \tau^{-}$ with $m_{A^{0}}$ between 4 and 9 GeV. See their Fig. 4 for limits on $B(t \to bH^{+})$ for 90 < $m_{H^{+}}$ < 160 GeV.

43 DESCHAMPS 10 make Type II two Higgs doublet model fits to weak leptonic and semileptonic decays, $b \to s\gamma$, $B, B_{S}$ mixings, and $Z \to b\bar{b}$. The limit holds irrespective of $\tan\beta$.

44 AALTONEN 09AJ search for $t \to bH^{+}$, $H^{+} \to c\bar{s}$ in $t\bar{t}$ events in 2.2 fb$^{-1}$ of $p\bar{p}$ collisions at $E_{cm} = 1.96$ TeV. Upper limits on $B(t \to bH^{+})$ between 0.08 and 0.32 (95% CL) are given for $m_{H^{+}} = 60-150$ GeV and $B(H^{+} \to c\bar{s}) = 1$.

45 ABAZOV 09AC search for $t \to bH^{+}$, $H^{+} \to \tau^{+} \nu$ in $t\bar{t}$ events in 0.9 fb$^{-1}$ of $p\bar{p}$ collisions at $E_{cm} = 1.96$ TeV. Upper limits on $B(t \to bH^{+})$ between 0.19 and 0.25 (95% CL) are given for $m_{H^{+}} = 80-155$ GeV and $B(H^{+} \to \tau^{+} \nu) = 1$. See their Fig. 4 for an excluded region in a MSSM scenario.

46 ABAZOV 09AG measure $t\bar{t}$ cross sections in final states with $\ell^{+}$ jets ($\ell = e, \mu$), $\ell\ell$, and $\tau \ell$ in 1 fb$^{-1}$ of $p\bar{p}$ collisions at $E_{cm} = 1.96$ TeV, which constrains possible $t \to bH^{+}$ branching fractions. Upper limits (95% CL) on $B(t \to bH^{+})$ between 0.15 and 0.40 (0.48 and 0.57) are given for $B(H^{+} \to \tau^{+} \nu) = 1$ ($B(H^{+} \to c\bar{s}) = 1$) for $m_{H^{+}} = 80-155$ GeV.

47 ABAZOV 09AI search for $t \to bH^{+}$ in $t\bar{t}$ events in 1 fb$^{-1}$ of $p\bar{p}$ collisions at $E_{cm} = 1.96$ TeV. Final states with $\ell^{+}$ jets ($\ell = e, \mu$, $\ell\ell$, and $\tau \ell$ are examined. Upper limits on $B(t \to bH^{+})$ (95% CL) between 0.15 and 0.19 (0.19 and 0.22) are given for $B(H^{+} \to \tau^{+} \nu) = 1$ ($B(H^{+} \to c\bar{s}) = 1$) for $m_{H^{+}} = 80-155$ GeV. For $B(H^{+} \to \tau^{+} \nu) = 1$ also a simultaneous extraction of $B(t \to bH^{+})$ and the $t\bar{t}$ cross section is performed, yielding a limit on $B(t \to bH^{+})$ between 0.12 and 0.26 for $m_{H^{+}} = 80-155$ GeV. See their Figs. 5-8 for excluded regions in several MSSM scenarios.

48 ABAZOV 09P search for $H^{+}$ production by $q\bar{q}'$ annihilation followed by $H^{+} \to t\bar{b}$ decay in 0.9 fb$^{-1}$ of $p\bar{p}$ collisions at $E_{cm} = 1.96$ TeV. Cross section limits in several two-doublet models are given for $m_{H^{+}} = 180-300$ GeV. A region with $20 \lesssim \tan\beta \lesssim 70$ is excluded (95% CL) for 180 GeV $\lesssim m_{H^{+}} \lesssim 184$ GeV in type-I models.

49 ABULENCIA 06E search for associated $H^0 W$ production in $p\bar{p}$ collisions at $E_{cm} = 1.96$ TeV. A fit is made for $t\bar{t}$ production processes in dilepton, lepton + jets, and lepton + $\tau$ final states, with the decays $t \to W^{+} b$ and $t \to H^{+} b$ followed by $H^{+} \to \tau^{+} \nu$, $c\bar{s}$, $t^*\bar{b}$, or $W^{+} H^0$. Within the MSSM the search is sensitive to the region $\tan\beta < 1$ or $> 30$ in the mass range $m_{H^{+}} = 80-160$ GeV. See Fig. 2 for the excluded region in a certain MSSM scenario.

50 ABDALLAH 04I search for $e^{+} e^{-} \to H^{+} H^{-}$ with $H^{\pm}$ decaying to $\tau \nu$, $c\bar{s}$, or $W^{*} A^{0}$ in Type-I two-Higgs-doublet models.

51 ABIENDI 03 give a limit $m_{H^{+}} > 1.28\tan\beta$ GeV (95%CL) in Type II two-doublet models.

52 ABAZOV 02E search for a charged Higgs boson in top decays with $H^{+} \to \tau^{+} \nu$ at $E_{cm} = 1.8$ TeV. For $m_{H^{+}} = 75$ GeV, the region $\tan\beta > 32.0$ is excluded at 95%CL. The excluded mass region extends to over 140 GeV for $\tan\beta$ values above 100.

53 BORZUMATI 02 point out that the decay modes such as $b\bar{b}W$, $A^{0}W$, and supersymmetric ones can have substantial branching fractions in the mass range explored at LEP II and Tevatron.

54 ABIENDI 01q give a limit $\tan\beta/m_{H^{+}} < 0.53$ GeV$^{-1}$ (95%CL) in Type II two-doublet models.

55 BARATE 01E give a limit $\tan\beta/m_{H^{+}} < 0.40$ GeV$^{-1}$ (90% CL) in Type II two-doublet models. An independent measurement of $B \to \tau \nu_{\tau} X$ gives $\tan\beta/m_{H^{+}} < 0.49$ GeV$^{-1}$ (90% CL).

56 GAMBINO 01 use the world average data in the summer of 2001 $B(b \to s\gamma) = (3.23 \pm 0.42) \times 10^{-4}$. The limit applies for Type-II two-doublet models.

57 AFFOLDER 00I search for a charged Higgs boson in top decays with $H^{+} \to \tau^{+} \nu$ in $p\bar{p}$ collisions at $E_{cm} = 1.8$ TeV. The excluded mass region extends to over 120 GeV for $\tan\beta$ values above 100 and $B(\tau\nu) = 1$. If $B(t \to bH^{+}) \lesssim 0.6$, $m_{H^{+}}$ up to 160 GeV is excluded. Updates ABE 97L.

58 ABBOTT 99E search for a charged Higgs boson in top decays in $p\bar{p}$ collisions at $E_{cm} = 1.8$ TeV, by comparing the observed $t\bar{t}$ cross section (extracted from the data assuming the dominant decay $t \to bW^{+}$) with theoretical expectation. The search is sensitive to regions of the domains $\tan\beta \lesssim 1$, $50 < m_{H^{+}}(\text{GeV}) \lesssim 120$ and $\tan\beta \lesssim 40$, $50 < m_{H^{+}}(\text{GeV}) \lesssim 160$. See Fig. 3 for the details of the excluded region.

59 ACKERSTAFF 99D measure the Michel parameters $\rho$, $\xi$, $\eta$, and $\xi\delta$ in leptonic $\tau$ decays from $Z \to \tau\tau$. Assuming $e-\mu$ universality, the limit $m_{H^{+}} > 0.97$ tan$\beta$ GeV (95%CL) is obtained for two-doublet models in which only one doublet couples to leptons.

60 ACCIARRI 97f give a limit $m_{H^{+}} > 2.6$ tan$\beta$ GeV (90% CL) from their limit on the exclusive $B \to \tau \nu_{\tau}$ branching ratio.

61 AMMAR 97b measure the Michel parameter $\rho$ from $\tau \to e\nu\nu$ decays and assumes $e/\mu$ universality to extract the Michel $\eta$ parameter from $\tau \to \mu\nu\nu$ decays. The measurement is translated to a lower limit on $m_{H^{+}}$ in a two-doublet model $m_{H^{+}} > 0.97 \tan\beta$ GeV (90% CL).

62 COARASA 97 reanalyzed the constraint on the ($m_{H^{+}, \tan\beta$) plane derived from the inclusive $B \to \tau \nu_{\tau}$ X branching ratio in GROSSMAN 95B and BUSKULIC 95. They show that the constraint is quite sensitive to supersymmetric one-loop effects.

63 GUCHAIT 97 studies the constraints on $m_{H^{+}}$ set by Tevatron data on $\ell\tau$ final states in $t\bar{t} \to (Wb)(Hb)$, $W \to \ell\nu$, $H \to \tau\nu_{\tau}$. See Fig. 2 for the excluded region.

64 MANGANO 97 reconsiders the limit in ACCIARRI 97f including the effect of the potentially large $B_{C} \to \tau \nu_{\tau}$ background to $B_{U} \to \tau \nu_{\tau}$ decays. Stronger limits are obtained.

65 STAHL 97 fit $\tau$ lifetime, leptonic branching ratios, and the Michel parameters and derive limit $m_{H^{+}} > 1.5$ tan$\beta$ GeV (90% CL) for a two-doublet model. See also STAHL 94.

66 ALAM 95 measure the inclusive $b \to s\gamma$ branching ratio at $\Upsilon(45)$ and give $B(b \to s\gamma) < 4.2 \times 10^{-4}$ (95% CL), which translates to the limit $m_{H^{+}} > [244 + 63/(\tan\beta)^{1.3}]$.
GeV in the Type II two-doublet model. Light supersymmetric particles can invalidate this bound.

67 BUSKULIC 95 give a limit $m_{H^+} > 1.9 \tan\beta$ GeV (90% CL) for Type-II models from $b \to \tau\nu_\tau X$ branching ratio, as proposed in GROSSMAN 94.

### $H^±$ (charged Higgs) mass limits for $m_{H^+} > m(\text{top})$

Limits obtained at the LHC are given in the $m_{H^±}$ mod- benchmark scenario, see CARENA 13, and depend on the $\tan\beta$ values.

<table><thead><tr><th>VALUE (GeV)</th><th>CL%</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>&gt; 108</td><td>95</td><td>1 AABOUD</td><td>18BWATLS</td><td>$\tan\beta = 10$</td></tr><tr><td>&gt; 249</td><td>95</td><td>1 AABOUD</td><td>18BWATLS</td><td>$\tan\beta = 20$</td></tr><tr><td>&gt; 390</td><td>95</td><td>1 AABOUD</td><td>18BWATLS</td><td>$\tan\beta = 30$</td></tr><tr><td>&gt; 894</td><td>95</td><td>1 AABOUD</td><td>18BWATLS</td><td>$\tan\beta = 40$</td></tr><tr><td>&gt;1017</td><td>95</td><td>1 AABOUD</td><td>18BWATLS</td><td>$\tan\beta = 50$</td></tr><tr><td>&gt;1103</td><td>95</td><td>1 AABOUD</td><td>18BWATLS</td><td>$\tan\beta = 60$</td></tr></tbody></table>

1 AABOUD 18BW search for $\bar{t}bH^+$ associated production in 36.1 fb$^{-1}$ of pp collisions at $E_{cm} = 13$ TeV. See also their Fig. 9 for the excluded region in the hMSSM parameter space.

### $H^{±±}$ (doubly-charged Higgs boson) mass limits

This section covers searches for a doubly-charged Higgs boson with couplings to lepton pairs. Its weak isospin $T_3$ is thus restricted to two possibilities depending on lepton chirality: $T_3(H^{±±}) = \pm 1$, with the coupling $g_{\ell\ell}$ to $\ell^-\ell^-$ and $\ell^+\ell^+$ ("left-handed") and $T_3(H^{±±}) = 0$, with the coupling to $\ell^-\ell^-$ and $\ell^+\ell^-$ ("right-handed"). These Higgs bosons appear in some left-right symmetric models based on the gauge group $SU(2)_L \times SU(2)_R \times U(1)$, the type-II seesaw model, and the Zee-Babu model. The two cases are listed separately in the following. Unless noted, one of the lepton flavor combinations is assumed to be dominant in the decay.

### Limits for $H^{±±}$ with $T_3 = \pm 1$

<table><thead><tr><th>VALUE (GeV)</th><th>CL%</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>&gt;1020</td><td>95</td><td>1 AAD</td><td>23AI ATLS</td><td>$\ell\ell$</td></tr><tr><td>&gt; 220</td><td>95</td><td>2 AABOUD</td><td>19K ATLS</td><td>$W^\pm W^\pm$</td></tr><tr><td>&gt; 768</td><td>95</td><td>3 AABOUD</td><td>18BC ATLS</td><td>$e\bar{e}$</td></tr><tr><td>&gt; 846</td><td>95</td><td>3 AABOUD</td><td>18BC ATLS</td><td>$\mu\mu$</td></tr><tr><td>&gt; 468</td><td>95</td><td>4 AAD</td><td>15AG ATLS</td><td>$e\mu$</td></tr><tr><td>&gt; 400</td><td>95</td><td>5 AAD</td><td>15AP ATLS</td><td>$e\tau$</td></tr><tr><td>&gt; 400</td><td>95</td><td>5 AAD</td><td>15AP ATLS</td><td>$\mu\tau$</td></tr><tr><td>&gt; 169</td><td>95</td><td>6 CHATRCHYAN 12AU CMS</td><td></td><td>$\tau\tau$</td></tr><tr><td>&gt; 300</td><td>95</td><td>6 CHATRCHYAN 12AU CMS</td><td></td><td>$\mu\tau$</td></tr><tr><td>&gt; 293</td><td>95</td><td>6 CHATRCHYAN 12AU CMS</td><td></td><td>$e\tau$</td></tr><tr><td>&gt; 395</td><td>95</td><td>6 CHATRCHYAN 12AU CMS</td><td></td><td>$\mu\mu$</td></tr><tr><td>&gt; 391</td><td>95</td><td>6 CHATRCHYAN 12AU CMS</td><td></td><td>$e\mu$</td></tr><tr><td>&gt; 382</td><td>95</td><td>6 CHATRCHYAN 12AU CMS</td><td></td><td>$e\bar{e}$</td></tr><tr><td>&gt; 98.1</td><td>95</td><td>7 ABDALLAH</td><td>03 DLPH</td><td>$\tau\tau$</td></tr><tr><td>&gt; 99.0</td><td>95</td><td>8 ABDIENDI</td><td>02C OPAL</td><td>$\tau\tau$</td></tr></tbody></table>

• • • We do not use the following data for averages, fits, limits, etc. • • •

<table><tbody><tr><td>&gt; 350</td><td>95</td><td>9 AAD</td><td>21U ATLS</td><td>$W^\pm W^\pm$</td></tr><tr><td>&gt; 230</td><td>95</td><td>10 AAD</td><td>21U ATLS</td><td>$H^{±±}H^±$ associated production, $H^{±±} \to W^\pm W^\pm$, $H^± \to W^\pm Z$</td></tr><tr><td>&gt; 551</td><td>95</td><td>11 SIRUNYAN</td><td>21W CMS</td><td>$W^\pm W^\pm$</td></tr><tr><td>&gt; 516</td><td>95</td><td>12 SIRUNYAN</td><td>19CQ CMS</td><td>$W^\pm W^\pm$</td></tr><tr><td>&gt; 551</td><td>95</td><td>13 SIRUNYAN</td><td>18CC CMS</td><td>$W^\pm W^\pm$</td></tr><tr><td>&gt; 551</td><td>95</td><td>4 AAD</td><td>15AG ATLS</td><td>$e\bar{e}$</td></tr><tr><td>&gt; 516</td><td>95</td><td>4 AAD</td><td>15AG ATLS</td><td>$\mu\mu$</td></tr><tr><td>&gt; 551</td><td>95</td><td>14 KANEMURA</td><td>15 RVUE</td><td>$W^\pm W^\pm$</td></tr><tr><td>&gt; 551</td><td>95</td><td>15 KHACHATRY...15D CMS</td><td></td><td>$W^\pm W^\pm$</td></tr><tr><td>&gt; 551</td><td>95</td><td>16 KANEMURA</td><td>14 RVUE</td><td>$W^\pm W^\pm$</td></tr><tr><td>&gt; 330</td><td>95</td><td>17 AAD</td><td>13Y ATLS</td><td>$\mu\mu$</td></tr><tr><td>&gt; 237</td><td>95</td><td>17 AAD</td><td>13Y ATLS</td><td>$\mu\tau$</td></tr><tr><td>&gt; 355</td><td>95</td><td>18 AAD</td><td>12AY ATLS</td><td>$\mu\mu$</td></tr><tr><td>&gt; 398</td><td>95</td><td>19 AAD</td><td>12CQ ATLS</td><td>$\mu\mu$</td></tr><tr><td>&gt; 375</td><td>95</td><td>19 AAD</td><td>12CQ ATLS</td><td>$e\mu$</td></tr><tr><td>&gt; 409</td><td>95</td><td>19 AAD</td><td>12CQ ATLS</td><td>$e\bar{e}$</td></tr><tr><td>&gt; 128</td><td>95</td><td>20 ABAZOV</td><td>12A D0</td><td>$\tau\tau$</td></tr><tr><td>&gt; 144</td><td>95</td><td>20 ABAZOV</td><td>12A D0</td><td>$\mu\tau$</td></tr><tr><td>&gt; 245</td><td>95</td><td>21 AALTONEN</td><td>11AF CDF</td><td>$\mu\mu$</td></tr><tr><td>&gt; 210</td><td>95</td><td>21 AALTONEN</td><td>11AF CDF</td><td>$e\mu$</td></tr><tr><td>&gt; 225</td><td>95</td><td>21 AALTONEN</td><td>11AF CDF</td><td>$e\bar{e}$</td></tr><tr><td>&gt; 114</td><td>95</td><td>22 AALTONEN</td><td>08AA CDF</td><td>$e\tau$</td></tr><tr><td>&gt; 112</td><td>95</td><td>22 AALTONEN</td><td>08AA CDF</td><td>$\mu\tau$</td></tr><tr><td>&gt; 168</td><td>95</td><td>23 ABAZOV</td><td>08V D0</td><td>$\mu\mu$</td></tr><tr><td>&gt; 133</td><td>95</td><td>24 AKTAS</td><td>06A H1</td><td>single $H^{±±}$</td></tr><tr><td>&gt; 118.4</td><td>95</td><td>25 ACOSTA</td><td>05L CDF</td><td>stable</td></tr><tr><td></td><td></td><td>26 ABAZOV</td><td>04E D0</td><td>$\mu\mu$</td></tr><tr><td></td><td></td><td>27 ABDIENDI</td><td>03Q OPAL</td><td>$E_{cm} \le 209$ GeV, single $H^{±±}$</td></tr><tr><td></td><td></td><td>28 GORDEEV</td><td>97 SPEC</td><td>muonium conversion</td></tr><tr><td></td><td></td><td>29 ASAKA</td><td>95 THEO</td><td></td></tr></tbody></table>

<table><tbody><tr><td>&gt; 45.6</td><td>95</td><td>30 ACTON</td><td>92M OPAL</td></tr><tr><td>&gt; 30.4</td><td>95</td><td>31 ACTON</td><td>92M OPAL</td></tr><tr><td>none 6.5-36.6</td><td>95</td><td>32 SWARTZ</td><td>90 MRK2</td></tr></tbody></table>

1 AAD 23AI search for $H^{++}H^{--}$ production using 139 fb$^{-1}$ of pp collisions at $E_{cm} = 13$ TeV. Decay branching ratios $B(H^{++} \to \ell^+\ell^+)$ for the six flavor combinations are assumed to be equal, adding up to unity. If the $T_3 = 0$ states are degenerate with the $T_3 = \pm 1$ states, the limit becomes 1080 GeV.

2 AABOUD 19K search for pair production of $H^{++}H^{--}$ followed by the decay $H^{±±} \to W^\pm W^\pm$ in 36.1 fb$^{-1}$ of pp collisions at $E_{cm} = 13$ TeV. The search is interpreted in a doublet-triplet extension of the scalar sector with a vev of 0.1 GeV, leading to $B(H^{±±} \to W^\pm W^\pm) = 1$. See their Fig. 5 for limits on the cross section for $m_{H^{++}}$ between 200 and 700 GeV.

3 See their Figs. 11(b) and 13 for limits with smaller branching ratios.

4 AAD 15AG search for $H^{++}H^{--}$ production in 20.3 fb$^{-1}$ of pp collisions at $E_{cm} = 8$ TeV. The limit assumes 100% branching ratio to the specified final state. See their Fig. 5 for limits for arbitrary branching ratios.

5 AAD 15AP search for $H^{++}H^{--}$ production in 20.3 fb$^{-1}$ of pp collisions at $E_{cm} = 8$ TeV. The limit assumes 100% branching ratio to the specified final state.

6 CHATRCHYAN 12AU search for $H^{++}H^{--}$ production with 4.9 fb$^{-1}$ of pp collisions at $E_{cm} = 7$ TeV. The limit assumes 100% branching ratio to the specified final state. See their Table 6 for limits including associated $H^{++}H^-$ production or assuming different scenarios.

7 ABDALLAH 03 search for $H^{++}H^{--}$ pair production either followed by $H^{++} \to \tau^+\tau^+$, or decaying outside the detector.

8 ABDIENDI 02C searches for pair production of $H^{++}H^{--}$, with $H^{±±} \to \ell^+\ell^+$ ($\ell, \ell' = e, \mu, \tau$). The limit holds for $\ell = \ell' = \tau$, and becomes stronger for other combinations of leptonict final states. To ensure the decay within the detector, the limit only applies for $g(H^\ell) \gtrsim 10^{-7}$.

9 AAD 21U search for pair production of $H^{++}H^{--}$ followed by the decay $H^{±±} \to W^\pm W^\pm$ in 139 fb$^{-1}$ of pp collisions at $E_{cm} = 13$ TeV. The search is interpreted in a triplet extension of the SM Higgs sector with a triplet vev of 0.1 GeV, leading to $B(H^{±±} \to W^\pm W^\pm) = 1$. See their Fig. 9(a) for limits on the cross section for $m_{H^{++}}$ between 200 and 600 GeV.

10 AAD 21U search for associated production of $H^{±±}H^±$ followed by the decays $H^{±±} \to W^\pm W^\pm$, $H^± \to W^\pm Z$ in 139 fb$^{-1}$ of pp collisions at $E_{cm} = 13$ TeV. $H^{±±}$ and $H^±$ are assumed to be degenerate in mass within 5 GeV. The search is interpreted in a triplet extension of the SM Higgs sector with a triplet vev of 0.1 GeV, leading to $B(H^{±±} \to W^\pm W^\pm) = 1$. See their Fig. 9(b) for limits on the cross section for $m_{H^{++}}$ between 200 and 600 GeV.

11 SIRUNYAN 21W search for vector boson fusion production of $H^{±±}$ decaying to $H^{±±} \to W^\pm W^\pm \to \ell^+\ell^+\nu$ in 137 fb$^{-1}$ of pp collisions at $E_{cm} = 13$ TeV. See their Fig. 8 for limits on cross section times branching ratio for $m_{H^{++}} = 0.2-3.0$ TeV.

12 SIRUNYAN 19CQ search for $H^{±±}$ production by vector boson fusion followed by the decay $H^{±±} \to W^\pm W^\pm \to q\bar{q}\ell\nu$ in 35.9 fb$^{-1}$ of pp collisions at $E_{cm} = 13$ TeV. See their Fig. 5 for limits on cross section times branching ratio for $m_{H^{±±}}$ between 0.6 and 2 TeV.

13 SIRUNYAN 18CC search for $H^{±±}$ production by vector boson fusion followed by the decay $H^{±±} \to W^\pm W^\pm$ in 35.9 fb$^{-1}$ of pp collisions at $E_{cm} = 13$ TeV. See their Fig. 3 for limits on cross section times branching ratio for $m_{H^{±±}}$ between 200 and 1000 GeV.

14 KANEMURA 15 examine the case where $H^{++}$ decays preferentially to $W^*(\to)W^*(\to)$ and estimate that a lower mass limit of $\sim 84$ GeV can be derived from the same-sign dilepton data of AAD 15AG if $H^{++}$ decays with 100% branching ratio to $W^*(\to)W^*(\to)$.

15 KHACHATRYAN 15D search for $H^{±±}$ production by vector boson fusion followed by the decay $H^{±±} \to W^\pm W^\pm$ in 19.4 fb$^{-1}$ of pp collisions at $E_{cm} = 8$ TeV. See their Fig. 4 for limits on cross section times branching ratio for $m_{H^{++}}$ between 160 and 800 GeV.

16 KANEMURA 14 examine the case where $H^{++}$ decays preferentially to $W^*(\to)W^*(\to)$ and estimate that a lower mass limit of $\sim 60$ GeV can be derived from the same-sign dilepton data of AAD 12Cv.

17 AAD 13Y search for $H^{++}H^{--}$ production in a generic search of events with three charged leptons in 4.6 fb$^{-1}$ of pp collisions at $E_{cm} = 7$ TeV. The limit assumes 100% branching ratio to the specified final state.

18 AAD 12AY search for $H^{++}H^{--}$ production with 1.6 fb$^{-1}$ of pp collisions at $E_{cm} = 7$ TeV. The limit assumes 100% branching ratio to the specified final state.

19 AAD 12CQ search for $H^{++}H^{--}$ production with 4.7 fb$^{-1}$ of pp collisions at $E_{cm} = 7$ TeV. The limit assumes 100% branching ratio to the specified final state. See their Table 1 for limits assuming smaller branching ratios.

20 ABAZOV 12A search for $H^{++}H^{--}$ production in 7.0 fb$^{-1}$ of $p\bar{p}$ collisions at $E_{cm} = 1.96$ TeV.

21 AALTONEN 11AF search for $H^{++}H^{--}$ production in 6.1 fb$^{-1}$ of $p\bar{p}$ collisions at $E_{cm} = 1.96$ TeV.

22 AALTONEN 08AA search for $H^{++}H^{--}$ production in $p\bar{p}$ collisions at $E_{cm} = 1.96$ TeV. The limit assumes 100% branching ratio to the specified final state.

23 ABAZOV 08V search for $H^{++}H^{--}$ production in $p\bar{p}$ collisions at $E_{cm} = 1.96$ TeV. The limit is for $B(H \to \mu\mu) = 1$. The limit is updated in ABAZOV 12A.

24 AKTAS 06A search for single $H^{±±}$ production in $e\bar{e}$ collisions at HERA. Assuming that $H^{++}$ only couples to $e^+\mu^+$ with $g_{e\mu} = 0.3$ (electromagnetic strength), a limit $m_{H^{++}} > 141$ GeV (95% CL) is derived. For the case where $H^{++}$ couples to $e\tau$ only the limit is 112 GeV.

25 ACOSTA 05L search for $H^{++}H^{--}$ pair production in $p\bar{p}$ collisions. The limit is valid for $g_{\ell\ell} \ll 10^{-8}$ so that the Higgs decays outside the detector.

26 ABAZOV 04E search for $H^{++}H^{--}$ pair production in $H^{±±} \to \mu^+\mu^+$. The limit is valid for $g_{\mu\mu} \gtrsim 10^{-7}$.

27 ABDIENDI 03O searches for single $H^{±±}$ via direct production in $e^+e^- \to e^+e^+H^{±±}$, and via t-channel exchange in $e^+e^- \to e^+e^-$. In the direct case, and assuming $B(H^{±±} \to \ell^+\ell^+) = 1$, a 95% CL limit on $h_{ee} < 0.071$ is set for $m_{H^{±±}} < 160$ GeV (see Fig. 6). In the second case, indirect limits on $h_{ee}$ are set for $m_{H^{±±}} < 2$ TeV (see Fig. 8).
# Gauge & Higgs Boson Particle Listings
## Charged Higgs Bosons ($H^±$ and $H^{±±}$), Searches for

28 GORDEEV 97 search for muonium-antimuonium conversion and find $G_{M\bar{M}}/G_F < 0.14$ (90% CL), where $G_{M\bar{M}}$ is the lepton-flavor violating effective four-fermion coupling. This limit may be converted to $m_{H^{++}} > 210$ GeV if the Yukawa couplings of $H^{++}$ to $ee$ and $\mu\mu$ are as large as the weak gauge coupling. For similar limits on muonium-antimuonium conversion, see the muon Particle Listings.

29 ASAKA 95 point out that $H^{++}$ decays dominantly to four fermions in a large region of parameter space where the limit of ACTON 92m from the search of dielectron modes does not apply.

30 ACTON 92M limit assumes $H^{±±} \to \ell^±\ell^±$ or $H^{±±}$ does not decay in the detector. Thus the region $g_{\ell\ell} \approx 10^{-7}$ is not excluded.

31 ACTON 92M from $\Delta\Gamma_Z < 40$ MeV.

32 SWARTZ 90 assume $H^{±±} \to \ell^±\ell^±$ (any flavor). The limits are valid for the Higgs-lepton coupling $g(H\ell\ell) \gtrsim 7.4 \times 10^{-7}/[m_H/\text{GeV}]^{1/2}$. The limits improve somewhat for ee and $\mu\mu$ decay modes.

### Limits for $H^{±±}$ with $T_3 = 0$

<table><thead><tr><th>VALUE (GeV)</th><th>CL%</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>&gt;900</td><td>95</td><td>1 AAD</td><td>23AI ATLS</td><td>ℓℓ</td></tr><tr><td>&gt; 58</td><td>95</td><td>2 AABOUD</td><td>18BC ATLS</td><td>ee</td></tr><tr><td>&gt;723</td><td>95</td><td>2 AABOUD</td><td>18BC ATLS</td><td>μμ</td></tr><tr><td>&gt;402</td><td>95</td><td>3 AAD</td><td>15AG ATLS</td><td>eμ</td></tr><tr><td>&gt;290</td><td>95</td><td>4 AAD</td><td>15AP ATLS</td><td>eτ</td></tr><tr><td>&gt;290</td><td>95</td><td>4 AAD</td><td>15AP ATLS</td><td>μτ</td></tr><tr><td>&gt; 97.3</td><td>95</td><td>5 ABDALLAH</td><td>03 DLPH</td><td>ττ</td></tr><tr><td>&gt; 97.3</td><td>95</td><td>6 ACHARD</td><td>03F L3</td><td>ττ</td></tr><tr><td>&gt; 98.5</td><td>95</td><td>7 ABBIENDI</td><td>02C OPAL</td><td>ττ</td></tr><tr><td>• • •</td><td></td><td colspan="3">We do not use the following data for averages, fits, limits, etc. • • •</td></tr><tr><td>&gt;374</td><td>95</td><td>3 AAD</td><td>15AG ATLS</td><td>ee</td></tr><tr><td>&gt;438</td><td>95</td><td>3 AAD</td><td>15AG ATLS</td><td>μμ</td></tr><tr><td>&gt;251</td><td>95</td><td>8 AAD</td><td>12AY ATLS</td><td>μμ</td></tr><tr><td>&gt;306</td><td>95</td><td>9 AAD</td><td>12CQ ATLS</td><td>μμ</td></tr><tr><td>&gt;310</td><td>95</td><td>9 AAD</td><td>12CQ ATLS</td><td>eμ</td></tr><tr><td>&gt;322</td><td>95</td><td>9 AAD</td><td>12CQ ATLS</td><td>ee</td></tr><tr><td>&gt;113</td><td>95</td><td>10 ABAZOV</td><td>12A D0</td><td>μτ</td></tr><tr><td>&gt;205</td><td>95</td><td>11 AALTONEN</td><td>11AF CDF</td><td>μμ</td></tr><tr><td>&gt;190</td><td>95</td><td>11 AALTONEN</td><td>11AF CDF</td><td>eμ</td></tr><tr><td>&gt;205</td><td>95</td><td>11 AALTONEN</td><td>11AF CDF</td><td>ee</td></tr><tr><td>&gt;145</td><td>95</td><td>12 ABAZOV</td><td>08V D0</td><td>μμ</td></tr><tr><td>&gt;322</td><td>95</td><td>13 AKTAS</td><td>06A H1</td><td>single $H^{±±}$</td></tr><tr><td>&gt;109</td><td>95</td><td>14 ACOSTA</td><td>05L CDF</td><td>stable</td></tr><tr><td>&gt; 98.2</td><td>95</td><td>15 ABAZOV</td><td>04E D0</td><td>μμ</td></tr><tr><td></td><td></td><td>16 ABBIENDI</td><td>03Q OPAL</td><td>$E_{cm} \le 209$ GeV, single $H^{±±}$</td></tr><tr><td></td><td></td><td>17 GORDEEV</td><td>97 SPEC</td><td>muonium conversion</td></tr><tr><td>&gt; 45.6</td><td>95</td><td>18 ACTON</td><td>92M OPAL</td><td></td></tr><tr><td>&gt; 25.5</td><td>95</td><td>19 ACTON</td><td>92M OPAL</td><td></td></tr><tr><td>none 7.3–34.3</td><td>95</td><td>20 SWARTZ</td><td>90 MRK2</td><td></td></tr></tbody></table>

1 AAD 23AI search for $H^{++}H^{--}$ production using 139 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 13$ TeV. Decay branching ratios $B(H^{++} \to \ell^+\ell^+)$ for the six flavor combinations are assumed to be equal, adding up to unity.

2 See their Figs. 12(b) and 14 for limits with smaller branching ratios.

3 AAD 15AG search for $H^{++}H^{--}$ production in 20.3 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 8$ TeV. The limit assumes 100% branching ratio to the specified final state. See their Fig. 5 for limits for arbitrary branching ratios.

4 AAD 15AP search for $H^{++}H^{--}$ production in 20.3 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 8$ TeV. The limit assumes 100% branching ratio to the specified final state.

5 ABDALLAH 03 search for $H^{++}H^{--}$ pair production either followed by $H^{++} \to \tau^+\tau^+$, or decaying outside the detector.

6 ACHARD 03F search for $e^+e^- \to H^{++}H^{--}$ with $H^{±±} \to \ell^±\ell^±$ (e, $\mu$, $\tau$), the limit holds for $\ell^\ell = \tau$, and slightly different limits apply for other flavor combinations. The limit is valid for $g_{\ell\ell'} \gtrsim 10^{-7}$.

7 ABBIENDI 02C searches for pair production of $H^{++}H^{--}$, with $H^{±±} \to \ell^±\ell^±$ ($\ell, \ell'$ = $e, \mu, \tau$), the limit holds for $\ell^\ell = \tau$, and becomes stronger for other combinations of leptonic final states. To ensure the decay within the detector, the limit only applies for $g(H\ell\ell) \gtrsim 10^{-7}$.

8 AAD 12AY search for $H^{++}H^{--}$ production with 1.6 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 7$ TeV. The limit assumes 100% branching ratio to the specified final state.

9 AAD 12CQ search for $H^{++}H^{--}$ production with 4.7 fb$^{-1}$ of $pp$ collisions at $E_{cm} = 7$ TeV. The limit assumes 100% branching ratio to the specified final state. See their Table 1 for limits assuming smaller branching ratios.

10 ABAZOV 12A search for $H^{++}H^{--}$ production in 7.0 fb$^{-1}$ of $p\bar{p}$ collisions at $E_{cm} = 1.96$ TeV.

11 AALTONEN 11AF search for $H^{++}H^{--}$ production in 6.1 fb$^{-1}$ of $p\bar{p}$ collisions at $E_{cm} = 1.96$ TeV.

12 ABAZOV 08V search for $H^{++}H^{--}$ production in $p\bar{p}$ collisions at $E_{cm} = 1.96$ TeV. The limit is for $B(H \to \mu\mu) = 1$. The limit is updated in ABAZOV 12A.

13 AKTAS 06A search for single $H^{±±}$ production in $ep$ collisions at HERA. Assuming that $H^{++}$ only couples to $e^+\mu^+$ with $g_{e\mu} = 0.3$ (electromagnetic strength), a limit $m_{H^{++}} > 141$ GeV (95% CL) is derived. For the case where $H^{++}$ couples to $e\tau$ only the limit is 112 GeV.

14 ACOSTA 05L search for $H^{++}H^{--}$ pair production in $p\bar{p}$ collisions. The limit is valid for $g_{\ell\ell'} \ll 10^{-8}$ so that the Higgs decays outside the detector.

15 ABAZOV 04E search for $H^{++}H^{--}$ pair production in $H^{±±} \to \mu^±\mu^±$. The limit is valid for $g_{\mu\mu} \gtrsim 10^{-7}$.

16 ABBIENDI 03Q searches for single $H^{±±}$ via direct production in $e^+e^- \to e^+e^-H^{±±}$, and via $t$-channel exchange in $e^+e^- \to e^+e^-$. In the standard case, and assuming $B(H^{±±} \to \ell^±\ell^±) = 1$, a 95% CL limit on $h_{ee} < 0.071$ is set for $m_{H^{±±}} < 160$ GeV

(see Fig. 6). In the second case, indirect limits on $h_{ee}$ are set for $m_{H^{±±}} < 2$ TeV (see Fig. 8).

17 GORDEEV 97 search for muonium-antimuonium conversion and find $G_{M\bar{M}}/G_F < 0.14$ (90% CL), where $G_{M\bar{M}}$ is the lepton-flavor violating effective four-fermion coupling. This limit may be converted to $m_{H^{++}} > 210$ GeV if the Yukawa couplings of $H^{++}$ to $ee$ and $\mu\mu$ are as large as the weak gauge coupling. For similar limits on muonium-antimuonium conversion, see the muon Particle Listings.

18 ACTON 92M limit assumes $H^{±±} \to \ell^±\ell^±$ or $H^{±±}$ does not decay in the detector. Thus the region $g_{\ell\ell} \approx 10^{-7}$ is not excluded.

19 ACTON 92M from $\Delta\Gamma_Z < 40$ MeV.

20 SWARTZ 90 assume $H^{±±} \to \ell^±\ell^±$ (any flavor). The limits are valid for the Higgs-lepton coupling $g(H\ell\ell) \gtrsim 7.4 \times 10^{-7}/[m_H/\text{GeV}]^{1/2}$. The limits improve somewhat for ee and $\mu\mu$ decay modes.

### $H^±$ and $H^{±±}$ REFERENCES

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Abe et al.</td><td>(CDF Collab.)</td></tr><tr><td>ACCIARI</td><td>97F PL B396 327</td><td>M. Accardi et al.</td><td>(L3 Collab.)</td></tr><tr><td>AMMAR</td><td>97B PL R8 4686</td><td>R. Ammar et al.</td><td>(CLEO Collab.)</td></tr><tr><td>COARA</td><td>97 PL B406 337</td><td>J.A. Coarasa, R.A. Jimenez, J. Sola</td><td>(ALEPH Collab.)</td></tr><tr><td>GORDEEV</td><td>97 PAN 60 1164</td><td>V.A. Gordeev et al.</td><td>(PNPI)</td></tr><tr><td>GUCHAIT</td><td>97 P D55 7263</td><td>M. Guchait, D.P. Roy</td><td>(TATA)</td></tr><tr><td>MANGANO</td><td>97 PL B410 299</td><td>M. Mangano, S. Slabospitsky</td><td>(BONN)</td></tr><tr><td>STAHL</td><td>97 PZY C74 73</td><td>A. Stahl, H. Voss</td><td>(CMS Collab.)</td></tr><tr><td>PDG</td><td>95 PR D54 1</td><td>R. M. Barnett et al.</td><td>(PDG Collab.)</td></tr><tr><td>ALAM</td><td>95 PR D54 2885</td><td>M.S. Alam et al.</td><td>(CLEO Collab.)</td></tr><tr><td>ASAKA</td><td>95 PL B345 36</td><td>T. Asaka, K.I. Hikasa</td><td>(TOHK)</td></tr><tr><td>BUSKULIC</td><td>95 PL B343 444</td><td>D. Buskulic et al.</td><td>(ALEPH Collab.)</td></tr></tbody></table>
GROSSMAN 95B PL B357 630
GROSSMAN 94 PL B332 373
STAHL 94 PL B324 121
ACTON 92M PL B295 347
SWARTZ 90 PRL 64 2877

Y. Grossman, H. Haber, Y. Nir
Y. Grossman, Z. Ligeti
A. Stahl
P.D. Acton et al.
M.L. Swartz et al.

(BONN)
(OPAL Collab.)
(Mark II Collab.)

## New Heavy Bosons ($W', Z'$, leptoquarks, etc.), Searches for

We list here various limits on charged and neutral heavy vector bosons (other than $W'$s and $Z'$s), heavy scalar bosons (other than Higgs bosons), vector or scalar leptoquarks, and axigluons. The latest unpublished results are described in "$W'$ Searches" and "$Z'$ Searches" reviews. For recent searches on scalar bosons which could be identified as Higgs bosons, see the listings in the Higgs boson section.

## CONTENTS:

* Mass Limits for $W'$ (Heavy Charged Vector Boson Other Than $W$) in Hadron Collider Experiments

* $W_R$ (Right-Handed $W$ Boson) Mass Limits

* Limit on $W_L \cdot W_R$ Mixing Angle $\zeta$

* Mass Limits for $Z'$ (Heavy Neutral Vector Boson Other Than $Z$)

* Limits for $Z'_{SM}$

* Limits for $Z'_{LR}$

* Limits for $Z'_{X}$

* Limits for $Z'_{\psi}$

* Limits for $Z'_{\eta}$

* Limits for other $Z'$

* Searches for $Z'$ with Lepton-Flavor-Violating decays

* Indirect Constraints on Kaluza-Klein Gauge Bosons

* Mass Limits for Leptoquarks from Pair Production

* Mass Limits for Leptoquarks from Single Production

* Indirect Limits for Leptoquarks

* Mass Limits for Diquarks

* Mass Limits for $g_{A}$ (axigluon) and Other Color-Octet Gauge Bosons

* Mass Limits for Color-Octet Scalar Bosons

* $X^0$ (Heavy Boson) Searches in $Z$ Decays

* Mass Limits for a Heavy Neutral Boson Coupling to $e^+e^-$

* Search for $X^0$ Resonance in $e^+e^-$ Collisions

* Search for $X^0$ Resonance in $e^+e^-$ Collisions

* Search for $X^0$ Resonance in Two-Photon Process

* Search for $X^0$ Resonance in $e^+e^-$ $\to X^0\gamma$

* Search for $X^0$ Resonance in $Z \to rT X^0$

* Search for $X^0$ Resonance in $W X^0$ final state

* Search for $X^0$ Resonance in Quarkonium Decays

none 1000-3000 95

none 500-2820 95

none 300-3000 95

none 800-3200 95

>5100 95

none 250-2460 95

none 1200-3300 95

none 500-3700 95

none 1000-3600 95

none 1000-3050 95

none 400-5200 95

none 1000-3400 95

none 600-3300 95

none 800-2330 95

>2800 95

none 1200-3200, 3300-3600 95

>3600 95

none 1100-2500 95

>2220 95

>2300 95

none 600-2700 95

>4100 95

>2200 95

>2300 95

>2900 95

>2600 95

>2450 95

none 2780-3150 95

>2600 95

>4070 95

>1810 95

>2600 95

>2150 95

none 1000-1600 95

none 800-1500 95

none 1500-2600 95

none 500-1600 95

none 300-2700 95

none 400-1590 95

none 1500-1760 95

none 1500-1760 95

>4500 95

none 900-4400 95

none 1200-1900 and 2000-2200 95

>3240 95

none 300-880 95

none 1200-1900 and 2000-2200 95

>3240 95

none 200-1520 95

none 1000-1700 95

none 500-950 95

none 1100-1680 95

none 1000-1920 95

none 1000-1920 95

>2900 95

none 800-1510 95

none 700-940 95

none 700-1130 95

24 AABOUD 18AF ATLS $W' \to tb$

25 AABOUD 18AI ATLS $W' \to WH$

26 AABOUD 18AK ATLS $W' \to WZ$

27 AABOUD 18AL ATLS $W' \to WZ$

28 AABOUD 18BG ATLS $W' \to e\nu, \mu\nu$

29 AABOUD 18CH ATLS $W' \to WZ$

30 AABOUD 18F ATLS $W' \to WZ$

31 AABOUD 18K ATLS $W' \to \tau\nu$

32 SIRUNYAN 18 CMS $W' \to tb$

33 SIRUNYAN 18AX CMS $W' \to WZ$

34 SIRUNYAN 18AZ CMS $W' \to e\nu, \mu\nu$

35 SIRUNYAN 18BK CMS $W' \to WZ$

36 SIRUNYAN 18BO CMS $W' \to q\bar{q}$

37 SIRUNYAN 18DJ CMS $W' \to WZ$

38 SIRUNYAN 18ED CMS $W' \to WH$

39 SIRUNYAN 18P CMS $W' \to WZ$

40 AABOUD 17AK ATLS $W' \to q\bar{q}$

41 AABOUD 17AO ATLS $W' \to WH$

42 AABOUD 17B ATLS $W' \to WH$

43 KHACHATRY...17J CMS $W' \to N_\tau\tau \to \tau\tau jj$

44 KHACHATRY...17W CMS $W' \to q\bar{q}$

45 KHACHATRY...17Z CMS $W' \to e\nu, \mu\nu$

46 SIRUNYAN 17A CMS $W' \to WZ$

47 SIRUNYAN 17AK CMS $W' \to WZ, WH$

48 SIRUNYAN 17H CMS $W' \to \tau N$

49 SIRUNYAN 17I CMS $W' \to tb$

50 SIRUNYAN 17R CMS $W' \to WH$

50 SIRUNYAN 17R CMS $W' \to WH$

51 AABOUD 16AE ATLS $W' \to WZ$

52 AABOUD 16V ATLS $W' \to e\nu, \mu\nu$

53 AAD 16R ATLS $W' \to WZ$

54 AAD 16S ATLS $W' \to q\bar{q}$

55 KHACHATRY...16AO CMS $W' \to tb$

56 KHACHATRY...16AP CMS $W' \to WH$

57 KHACHATRY...16BD CMS $W' \to WH \to b\bar{b}\ell\nu$

58 KHACHATRY...16K CMS $W' \to q\bar{q}$

59 KHACHATRY...16L CMS $W' \to q\bar{q}$

60 KHACHATRY...16O CMS $W' \to \tau\nu$

61 AAD 15AU ATLS $W' \to WZ$

62 AAD 15AV ATLS $W' \to tb$

63 AAD 15AZ ATLS $W' \to WZ$

64 AAD 15CP ATLS $W' \to WZ$

65 AAD 15R ATLS $W' \to tb$

66 AAD 15V ATLS $W' \to q\bar{q}$

67 KHACHATRY...15C CMS $W' \to WZ$

68 KHACHATRY...15T CMS $W' \to e\nu, \mu\nu$

69 KHACHATRY...14O CMS $W' \to N\ell \to \ell\ell jj$

● ● ● We do not use the following data for averages, fits, limits, etc. ● ● ●

70 AAD 23BF ATLS $W' \to WZ' \to \ell\nu q\bar{q}$

71 AAD 23CG ATLS $W' \to N\ell \to \ell\ell jj$

72 AAD 23CK ATLS $W' \to XH$

73 AAD 23U ATLS $W' \to W\gamma$

74 TUMASYAN 22 CMS $W' \to WR \to WWW$

75 TUMASYAN 22AL CMS $W' \to tB, bT$

76 TUMASYAN 22B CMS $W' \to W\gamma$

77 TUMASYAN 22I CMS $W' \to WR \to WWW$

78 TUMASYAN 22P CMS $W' \to N\ell \to \ell\ell jj$

79 AAD 20AD ATLS $W' \to JJ$

80 AAD 20W ATLS $W' \to WZ' \to \ell\nu q\bar{q}$

81 AABOUD 19B ATLS $W' \to N\ell \to \ell\ell jj$

82 AABOUD 19BB ATLS $W' \to N\ell \to j\ell\ell$

83 SIRUNYAN 19V CMS $W' \to Bt, Tb$

84 AABOUD 18AA ATLS $W' \to W\gamma$

85 AABOUD 18AD ATLS $W' \to HX$

86 AABOUD 18CJ ATLS $W' \to WZ, WH, \ell\nu$

87 SIRUNYAN 18CV CMS $W' \to N\ell \to \ell\ell jj$

88 KHACHATRY...17U CMS $W' \to WH$

89 AAD 15BB ATLS $W' \to WH$

90 AALTONEN 15C CDF $W' \to tb$

91 KHACHATRY...15V CMS $W' \to q\bar{q}$

AAD 14AI ATLS $W' \to e\nu, \mu\nu$

92 AAD 14AT CSATS $W' \to W\gamma$

93 AAD 14S ATLS $W' \to WZ$

94 KHACHATRY...14 CMS $W' \to WZ$

95 KHACHATRY...14A CMS $W' \to WZ$

96 AAD 13AO ATLS $W' \to WZ$

97 AAD 13D ATLS $W' \to q\bar{q}$

98 CHATRCHYAN 13A CMS $W' \to WZ$

99 CHATRCHYAN 13AQ CMS $W' \to e\nu, \mu\nu$

100 CHATRCHYAN 13E CMS $W' \to tb$

101 AAD 12A ATLS $W' \to WZ$

## See the related review(s):

### $W'$-Boson Searches

### MASS LIMITS for $W'$ (Heavy Charged Vector Boson Other Than $W$) in Hadron Collider Experiments

Couplings of $W'$ to quarks and leptons are taken to be identical with those of $W$. The following limits are obtained from $p\bar{p}$ or $pp \to W'$X with $W'$ decaying to the mode indicated in the comments (e.g., $W' \to WZ$) are assumed to be suppressed. The most recent preliminary results can be found in the "$W'$-boson searches" review above.

<table><thead><tr><th>VALUE (GeV)</th><th>CL%</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td colspan="5">&gt;6000 (CL = 95%) OUR LIMIT</td></tr><tr><td>&gt;2500</td><td>95</td><td>1 AAD</td><td>23AH ATLS</td><td>$W' \to WZ$</td></tr><tr><td>none 500-4600</td><td>95</td><td>2 AAD</td><td>23CC ATLS</td><td>$W' \to tb$</td></tr><tr><td>&gt;1200</td><td>95</td><td>3 AAD</td><td>23L ATLS</td><td>$W' \to ZX$</td></tr><tr><td>none 400-3300</td><td>95</td><td>4 AAD</td><td>23O ATLS</td><td>$W' \to WH$</td></tr><tr><td>&gt;4400</td><td>95</td><td>5 TUMASYAN</td><td>23AP CMS</td><td>$W' \to WZ$</td></tr><tr><td>&gt;4000</td><td>95</td><td>6 TUMASYAN</td><td>23AP CMS</td><td>$W' \to WH$</td></tr><tr><td>none 600-4800</td><td>95</td><td>7 TUMASYAN</td><td>23AW CMS</td><td>$W' \to \tau\nu$</td></tr><tr><td>&gt;5700</td><td>95</td><td>8 TUMASYAN</td><td>22AC CMS</td><td>$W' \to e\nu, \mu\nu$</td></tr><tr><td>&gt;3900</td><td>95</td><td>9 TUMASYAN</td><td>22D CMS</td><td>$W' \to WZ$</td></tr><tr><td>&gt;4000</td><td>95</td><td>9 TUMASYAN</td><td>22D CMS</td><td>$W' \to WH$</td></tr><tr><td>none 1000-4000</td><td>95</td><td>10 TUMASYAN</td><td>22J CMS</td><td>$W' \to WZ$</td></tr><tr><td>none 500-2000</td><td>95</td><td>11 TUMASYAN</td><td>22R CMS</td><td>$W' \to WZ$</td></tr><tr><td>none 1000-3400</td><td>95</td><td>12 SIRUNYAN</td><td>21Y CMS</td><td>$W' \to tb$</td></tr><tr><td>&gt;3200</td><td>95</td><td>13 AAD</td><td>20AJ ATLS</td><td>$W' \to WH$</td></tr><tr><td>&gt;4300</td><td>95</td><td>14 AAD</td><td>20AT ATLS</td><td>$W' \to WZ$</td></tr><tr><td>none 1100-4000</td><td>95</td><td>15 AAD</td><td>20T ATLS</td><td>$W' \to q\bar{q}$</td></tr><tr><td>none 1800-3600</td><td>95</td><td>16 SIRUNYAN</td><td>20AI CMS</td><td>$W' \to q\bar{q}$</td></tr><tr><td>none 1200-3800</td><td>95</td><td>17 SIRUNYAN</td><td>20Q CMS</td><td>$W' \to WZ$</td></tr><tr><td>none 500-3250</td><td>95</td><td>18 AABOUD</td><td>19E ATLS</td><td>$W' \to tb$</td></tr><tr><td colspan="5">&gt;6000</td></tr><tr><td>none 1300-3600</td><td>95</td><td>19 AAD</td><td>19C ATLS</td><td>$W' \to e\nu, \mu\nu$</td></tr><tr><td>none 400-4000</td><td>95</td><td>20 AAD</td><td>19D ATLS</td><td>$W' \to WZ$</td></tr><tr><td>&gt;4300</td><td>95</td><td>21 SIRUNYAN</td><td>19AY CMS</td><td>$W' \to \tau\nu$</td></tr><tr><td>&gt;2600</td><td>95</td><td>22 SIRUNYAN</td><td>19CP CMS</td><td>$W' \to WZ, WH, \ell\nu$</td></tr><tr><td>&gt;2600</td><td>95</td><td>23 SIRUNYAN</td><td>19I CMS</td><td>$W' \to WH$</td></tr></tbody></table>