cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.17182/hepdata.76921.v2/t6
title: "Table 6" of "Measurement of matter-antimatter differences in beauty baryon decays"

description: Fig2b. The invariant mass distributions for $\Lambda^0_b\to \pi^- K^+ K^-$ decays. Uncertainties on the data points are statistical only and represent one standard deviations, calculated assuming Poisson-distributed entries.
description: CERN-LHC. Differences in the behaviour of matter and antimatter have been observed in $K$ and $B$ meson decays, but not yet in any baryon decay. Such differences are associated with the non-invariance of fundamental interactions under the combined charge-conjugation and parity transformations, known as $CP$ violation. Using data from the LHCb experiment at the Large Hadron Collider, a search is made for $CP$-violating asymmetries in the decay angle distributions of $\Lambda^0_b$ baryons decaying to $p\pi^-\pi^+\pi^-$ and $p\pi^-K^+K^-$ final states. These four-body hadronic decays are a promising place to search for sources of $CP$ violation both within and beyond the Standard Model of particle physics. We find evidence for $CP$ violation in $\Lambda^0_b\to p\pi^-\pi^+\pi^-$ decays with a statistical significance corresponding to 3.3 standard deviations including systematic uncertainties. This represents the first evidence for $CP$ violation in the baryon sector.
DOI: 10.17182/hepdata.76921.v1/t1
title: "Table 1" of "Measurement of matter-antimatter differences in beauty baryon decays"

description: Binning scheme A is defined to exploit interference patterns arising from the resonant structure of the decay. Bins 1-4 focus on the region dominated by the $\Delta(1232)^{++}\to p\pi^{+}$. The other eight bins are defined to study regions where $p\pi^{-}$ esonances are present (5-8) on either side of the $\rho(770)^{0}\to\pi^{+}\pi^{-}$ resonances (5-12). Further splitting for $|\Phi|$ lower or greater than $\pi/2$ is done to reduce potential dilution of asymmetries.
description: CERN-LHC. Differences in the behaviour of matter and antimatter have been observed in $K$ and $B$ meson decays, but not yet in any baryon decay. Such differences are associated with the non-invariance of fundamental interactions under the combined charge-conjugation and parity transformations, known as $CP$ violation. Using data from the LHCb experiment at the Large Hadron Collider, a search is made for $CP$-violating asymmetries in the decay angle distributions of $\Lambda^0_b$ baryons decaying to $p\pi^-\pi^+\pi^-$ and $p\pi^-K^+K^-$ final states. These four-body hadronic decays are a promising place to search for sources of $CP$ violation both within and beyond the Standard Model of particle physics. We find evidence for $CP$ violation in $\Lambda^0_b\to p\pi^-\pi^+\pi^-$ decays with a statistical significance corresponding to 3.3 standard deviations including systematic uncertainties. This represents the first evidence for $CP$ violation in the baryon sector.
DOI: 10.17182/hepdata.76921.v1/t2
title: "Table 2" of "Measurement of matter-antimatter differences in beauty baryon decays"

description: Definition of binning scheme B for the decay mode $\Lambda_b^0\to p\pi^-\pi^+\pi^-$.
description: CERN-LHC. Differences in the behaviour of matter and antimatter have been observed in $K$ and $B$ meson decays, but not yet in any baryon decay. Such differences are associated with the non-invariance of fundamental interactions under the combined charge-conjugation and parity transformations, known as $CP$ violation. Using data from the LHCb experiment at the Large Hadron Collider, a search is made for $CP$-violating asymmetries in the decay angle distributions of $\Lambda^0_b$ baryons decaying to $p\pi^-\pi^+\pi^-$ and $p\pi^-K^+K^-$ final states. These four-body hadronic decays are a promising place to search for sources of $CP$ violation both within and beyond the Standard Model of particle physics. We find evidence for $CP$ violation in $\Lambda^0_b\to p\pi^-\pi^+\pi^-$ decays with a statistical significance corresponding to 3.3 standard deviations including systematic uncertainties. This represents the first evidence for $CP$ violation in the baryon sector.
DOI: 10.17182/hepdata.76921.v1/t3
title: "Table 3" of "Measurement of matter-antimatter differences in beauty baryon decays"

description: For $\Lambda_b^0\to p\pi^-\pi^+\pi^-$ decays, the CP- and P-violating observables, $a^{\hat{T}-odd}_{CP}$ and $a^{\hat{T}-odd}_{P}$, resulting from the fit to the data are listed with their statistical and systematic uncertainties. Each value is obtained through an independent fit to a region of the phase space defined in Scheme A.
description: CERN-LHC. Differences in the behaviour of matter and antimatter have been observed in $K$ and $B$ meson decays, but not yet in any baryon decay. Such differences are associated with the non-invariance of fundamental interactions under the combined charge-conjugation and parity transformations, known as $CP$ violation. Using data from the LHCb experiment at the Large Hadron Collider, a search is made for $CP$-violating asymmetries in the decay angle distributions of $\Lambda^0_b$ baryons decaying to $p\pi^-\pi^+\pi^-$ and $p\pi^-K^+K^-$ final states. These four-body hadronic decays are a promising place to search for sources of $CP$ violation both within and beyond the Standard Model of particle physics. We find evidence for $CP$ violation in $\Lambda^0_b\to p\pi^-\pi^+\pi^-$ decays with a statistical significance corresponding to 3.3 standard deviations including systematic uncertainties. This represents the first evidence for $CP$ violation in the baryon sector.
DOI: 10.17182/hepdata.76921.v1/t4
title: "Table 4" of "Measurement of matter-antimatter differences in beauty baryon decays"

description: For $\Lambda_b^0\to p\pi^-\pi^+\pi^-$ decays, the CP- and P-violating observables, $a^{\hat{T}-odd}_{CP}$ and $a^{\hat{T}-odd}_{P}$, resulting from the fit to the data are listed with their statistical and systematic uncertainties. Each value is obtained through an independent fit to a region of the phase space defined in Scheme B.
description: CERN-LHC. Differences in the behaviour of matter and antimatter have been observed in $K$ and $B$ meson decays, but not yet in any baryon decay. Such differences are associated with the non-invariance of fundamental interactions under the combined charge-conjugation and parity transformations, known as $CP$ violation. Using data from the LHCb experiment at the Large Hadron Collider, a search is made for $CP$-violating asymmetries in the decay angle distributions of $\Lambda^0_b$ baryons decaying to $p\pi^-\pi^+\pi^-$ and $p\pi^-K^+K^-$ final states. These four-body hadronic decays are a promising place to search for sources of $CP$ violation both within and beyond the Standard Model of particle physics. We find evidence for $CP$ violation in $\Lambda^0_b\to p\pi^-\pi^+\pi^-$ decays with a statistical significance corresponding to 3.3 standard deviations including systematic uncertainties. This represents the first evidence for $CP$ violation in the baryon sector.
DOI: 10.17182/hepdata.76921.v1/t5
title: "Table 5" of "Measurement of matter-antimatter differences in beauty baryon decays"

description: Fig2a. The invariant mass distributions for $\Lambda^0_b\to p\pi^-\pi^+\pi^-$ decays. Uncertainties on the data points are statistical only and represent one standard deviations, calculated assuming Poisson-distributed entries.
description: CERN-LHC. Differences in the behaviour of matter and antimatter have been observed in $K$ and $B$ meson decays, but not yet in any baryon decay. Such differences are associated with the non-invariance of fundamental interactions under the combined charge-conjugation and parity transformations, known as $CP$ violation. Using data from the LHCb experiment at the Large Hadron Collider, a search is made for $CP$-violating asymmetries in the decay angle distributions of $\Lambda^0_b$ baryons decaying to $p\pi^-\pi^+\pi^-$ and $p\pi^-K^+K^-$ final states. These four-body hadronic decays are a promising place to search for sources of $CP$ violation both within and beyond the Standard Model of particle physics. We find evidence for $CP$ violation in $\Lambda^0_b\to p\pi^-\pi^+\pi^-$ decays with a statistical significance corresponding to 3.3 standard deviations including systematic uncertainties. This represents the first evidence for $CP$ violation in the baryon sector.
DOI: 10.17182/hepdata.76921.v1/t6
title: "Table 6" of "Measurement of matter-antimatter differences in beauty baryon decays"

description: Fig2b. The invariant mass distributions for $\Lambda^0_b\to \pi^- K^+ K^-$ decays. Uncertainties on the data points are statistical only and represent one standard deviations, calculated assuming Poisson-distributed entries.
description: CERN-LHC. Differences in the behaviour of matter and antimatter have been observed in $K$ and $B$ meson decays, but not yet in any baryon decay. Such differences are associated with the non-invariance of fundamental interactions under the combined charge-conjugation and parity transformations, known as $CP$ violation. Using data from the LHCb experiment at the Large Hadron Collider, a search is made for $CP$-violating asymmetries in the decay angle distributions of $\Lambda^0_b$ baryons decaying to $p\pi^-\pi^+\pi^-$ and $p\pi^-K^+K^-$ final states. These four-body hadronic decays are a promising place to search for sources of $CP$ violation both within and beyond the Standard Model of particle physics. We find evidence for $CP$ violation in $\Lambda^0_b\to p\pi^-\pi^+\pi^-$ decays with a statistical significance corresponding to 3.3 standard deviations including systematic uncertainties. This represents the first evidence for $CP$ violation in the baryon sector.
DOI: 10.17182/hepdata.76966.v1/t2
title: "Table 2" of "Measurement of the $k_\mathrm{t}$ splitting scales in $Z \to \ell\ell$ events in $pp$ collisions at $\sqrt{s} = 8$ TeV with the ATLAS detector"

description: The measured fiducial as a function of sqrt(d1). The fiducial cross sections are measred for the charged-only particle level in the muon channel as well as the electron channel. Extrapolations to the complete fiducial phase space including charged and neutral particles are also shown for the muon channel and the electron channel.
description: CERN-LHC. A measurement of the splitting scales occuring in the $k_\mathrm{t}$ jet-clustering algorithm is presented for final states containing a $Z$ boson. The measurement is done using 20.2 fb${}^{-1}$ of proton--proton collision data collected at a centre-of-mass energy of $\sqrt{s} = 8$ TeV by the ATLAS experiment at the LHC in 2012. The measurement is based on charged-particle track information, which is measured with excellent precision in the $p_\mathrm{T}$ region relevant for the transition between the perturbative and the non-perturbative regimes. The data distributions are corrected for detector effects, and are found to deviate from state-of-the-art predictions in various regions of the observables.

Primary measurement using only charged particles:
- Exactly 2 opposite-sign same-flavour dressed leptons (electrons or muons dressed with photons within deltaR &lt; 0.1)
- pT(lepton)&gt;25 GeV
- |eta(muons)|&lt;2.4
- |eta(electrons)|&lt;2.47 and not within 1.37&lt;|eta(electrons)|&lt;1.52
- all charged particles with pT(track) &gt; 400 MeV and |eta(track)|&lt;2.5, excluding dressed leptons
- pass charged particles into kT algorithm using R=0.4 or R=1.0

Extrapolation to complete fiducial phase space using charged and neutral particles:
- same as before, but use all particles (charged and neutral) with pT(track) &gt; 400 MeV and |eta(track)|&lt;2.5, excluding dressed leptons
- pass charged particles into kT algorithm using R=0.4 or R=1.0
DOI: 10.17182/hepdata.76966.v1/t3
title: "Table 3" of "Measurement of the $k_\mathrm{t}$ splitting scales in $Z \to \ell\ell$ events in $pp$ collisions at $\sqrt{s} = 8$ TeV with the ATLAS detector"

description: The measured fiducial as a function of sqrt(d2). The fiducial cross sections are measred for the charged-only particle level in the muon channel as well as the electron channel. Extrapolations to the complete fiducial phase space including charged and neutral particles are also shown for the muon channel and the electron channel.
description: CERN-LHC. A measurement of the splitting scales occuring in the $k_\mathrm{t}$ jet-clustering algorithm is presented for final states containing a $Z$ boson. The measurement is done using 20.2 fb${}^{-1}$ of proton--proton collision data collected at a centre-of-mass energy of $\sqrt{s} = 8$ TeV by the ATLAS experiment at the LHC in 2012. The measurement is based on charged-particle track information, which is measured with excellent precision in the $p_\mathrm{T}$ region relevant for the transition between the perturbative and the non-perturbative regimes. The data distributions are corrected for detector effects, and are found to deviate from state-of-the-art predictions in various regions of the observables.

Primary measurement using only charged particles:
- Exactly 2 opposite-sign same-flavour dressed leptons (electrons or muons dressed with photons within deltaR &lt; 0.1)
- pT(lepton)&gt;25 GeV
- |eta(muons)|&lt;2.4
- |eta(electrons)|&lt;2.47 and not within 1.37&lt;|eta(electrons)|&lt;1.52
- all charged particles with pT(track) &gt; 400 MeV and |eta(track)|&lt;2.5, excluding dressed leptons
- pass charged particles into kT algorithm using R=0.4 or R=1.0

Extrapolation to complete fiducial phase space using charged and neutral particles:
- same as before, but use all particles (charged and neutral) with pT(track) &gt; 400 MeV and |eta(track)|&lt;2.5, excluding dressed leptons
- pass charged particles into kT algorithm using R=0.4 or R=1.0
DOI: 10.17182/hepdata.76966.v1/t4
title: "Table 4" of "Measurement of the $k_\mathrm{t}$ splitting scales in $Z \to \ell\ell$ events in $pp$ collisions at $\sqrt{s} = 8$ TeV with the ATLAS detector"

description: The measured fiducial as a function of sqrt(d3). The fiducial cross sections are measred for the charged-only particle level in the muon channel as well as the electron channel. Extrapolations to the complete fiducial phase space including charged and neutral particles are also shown for the muon channel and the electron channel.
description: CERN-LHC. A measurement of the splitting scales occuring in the $k_\mathrm{t}$ jet-clustering algorithm is presented for final states containing a $Z$ boson. The measurement is done using 20.2 fb${}^{-1}$ of proton--proton collision data collected at a centre-of-mass energy of $\sqrt{s} = 8$ TeV by the ATLAS experiment at the LHC in 2012. The measurement is based on charged-particle track information, which is measured with excellent precision in the $p_\mathrm{T}$ region relevant for the transition between the perturbative and the non-perturbative regimes. The data distributions are corrected for detector effects, and are found to deviate from state-of-the-art predictions in various regions of the observables.

Primary measurement using only charged particles:
- Exactly 2 opposite-sign same-flavour dressed leptons (electrons or muons dressed with photons within deltaR &lt; 0.1)
- pT(lepton)&gt;25 GeV
- |eta(muons)|&lt;2.4
- |eta(electrons)|&lt;2.47 and not within 1.37&lt;|eta(electrons)|&lt;1.52
- all charged particles with pT(track) &gt; 400 MeV and |eta(track)|&lt;2.5, excluding dressed leptons
- pass charged particles into kT algorithm using R=0.4 or R=1.0

Extrapolation to complete fiducial phase space using charged and neutral particles:
- same as before, but use all particles (charged and neutral) with pT(track) &gt; 400 MeV and |eta(track)|&lt;2.5, excluding dressed leptons
- pass charged particles into kT algorithm using R=0.4 or R=1.0
DOI: 10.17182/hepdata.76966.v1/t5
title: "Table 5" of "Measurement of the $k_\mathrm{t}$ splitting scales in $Z \to \ell\ell$ events in $pp$ collisions at $\sqrt{s} = 8$ TeV with the ATLAS detector"

description: The measured fiducial as a function of sqrt(d4). The fiducial cross sections are measred for the charged-only particle level in the muon channel as well as the electron channel. Extrapolations to the complete fiducial phase space including charged and neutral particles are also shown for the muon channel and the electron channel.
description: CERN-LHC. A measurement of the splitting scales occuring in the $k_\mathrm{t}$ jet-clustering algorithm is presented for final states containing a $Z$ boson. The measurement is done using 20.2 fb${}^{-1}$ of proton--proton collision data collected at a centre-of-mass energy of $\sqrt{s} = 8$ TeV by the ATLAS experiment at the LHC in 2012. The measurement is based on charged-particle track information, which is measured with excellent precision in the $p_\mathrm{T}$ region relevant for the transition between the perturbative and the non-perturbative regimes. The data distributions are corrected for detector effects, and are found to deviate from state-of-the-art predictions in various regions of the observables.

Primary measurement using only charged particles:
- Exactly 2 opposite-sign same-flavour dressed leptons (electrons or muons dressed with photons within deltaR &lt; 0.1)
- pT(lepton)&gt;25 GeV
- |eta(muons)|&lt;2.4
- |eta(electrons)|&lt;2.47 and not within 1.37&lt;|eta(electrons)|&lt;1.52
- all charged particles with pT(track) &gt; 400 MeV and |eta(track)|&lt;2.5, excluding dressed leptons
- pass charged particles into kT algorithm using R=0.4 or R=1.0

Extrapolation to complete fiducial phase space using charged and neutral particles:
- same as before, but use all particles (charged and neutral) with pT(track) &gt; 400 MeV and |eta(track)|&lt;2.5, excluding dressed leptons
- pass charged particles into kT algorithm using R=0.4 or R=1.0
DOI: 10.17182/hepdata.76966.v1/t7
title: "Table 7" of "Measurement of the $k_\mathrm{t}$ splitting scales in $Z \to \ell\ell$ events in $pp$ collisions at $\sqrt{s} = 8$ TeV with the ATLAS detector"

description: The measured fiducial as a function of sqrt(d6). The fiducial cross sections are measred for the charged-only particle level in the muon channel as well as the electron channel. Extrapolations to the complete fiducial phase space including charged and neutral particles are also shown for the muon channel and the electron channel.
description: CERN-LHC. A measurement of the splitting scales occuring in the $k_\mathrm{t}$ jet-clustering algorithm is presented for final states containing a $Z$ boson. The measurement is done using 20.2 fb${}^{-1}$ of proton--proton collision data collected at a centre-of-mass energy of $\sqrt{s} = 8$ TeV by the ATLAS experiment at the LHC in 2012. The measurement is based on charged-particle track information, which is measured with excellent precision in the $p_\mathrm{T}$ region relevant for the transition between the perturbative and the non-perturbative regimes. The data distributions are corrected for detector effects, and are found to deviate from state-of-the-art predictions in various regions of the observables.

Primary measurement using only charged particles:
- Exactly 2 opposite-sign same-flavour dressed leptons (electrons or muons dressed with photons within deltaR &lt; 0.1)
- pT(lepton)&gt;25 GeV
- |eta(muons)|&lt;2.4
- |eta(electrons)|&lt;2.47 and not within 1.37&lt;|eta(electrons)|&lt;1.52
- all charged particles with pT(track) &gt; 400 MeV and |eta(track)|&lt;2.5, excluding dressed leptons
- pass charged particles into kT algorithm using R=0.4 or R=1.0

Extrapolation to complete fiducial phase space using charged and neutral particles:
- same as before, but use all particles (charged and neutral) with pT(track) &gt; 400 MeV and |eta(track)|&lt;2.5, excluding dressed leptons
- pass charged particles into kT algorithm using R=0.4 or R=1.0
DOI: 10.17182/hepdata.76966.v1/t8
title: "Table 8" of "Measurement of the $k_\mathrm{t}$ splitting scales in $Z \to \ell\ell$ events in $pp$ collisions at $\sqrt{s} = 8$ TeV with the ATLAS detector"

description: The measured fiducial as a function of sqrt(d7). The fiducial cross sections are measred for the charged-only particle level in the muon channel as well as the electron channel. Extrapolations to the complete fiducial phase space including charged and neutral particles are also shown for the muon channel and the electron channel.
description: CERN-LHC. A measurement of the splitting scales occuring in the $k_\mathrm{t}$ jet-clustering algorithm is presented for final states containing a $Z$ boson. The measurement is done using 20.2 fb${}^{-1}$ of proton--proton collision data collected at a centre-of-mass energy of $\sqrt{s} = 8$ TeV by the ATLAS experiment at the LHC in 2012. The measurement is based on charged-particle track information, which is measured with excellent precision in the $p_\mathrm{T}$ region relevant for the transition between the perturbative and the non-perturbative regimes. The data distributions are corrected for detector effects, and are found to deviate from state-of-the-art predictions in various regions of the observables.

Primary measurement using only charged particles:
- Exactly 2 opposite-sign same-flavour dressed leptons (electrons or muons dressed with photons within deltaR &lt; 0.1)
- pT(lepton)&gt;25 GeV
- |eta(muons)|&lt;2.4
- |eta(electrons)|&lt;2.47 and not within 1.37&lt;|eta(electrons)|&lt;1.52
- all charged particles with pT(track) &gt; 400 MeV and |eta(track)|&lt;2.5, excluding dressed leptons
- pass charged particles into kT algorithm using R=0.4 or R=1.0

Extrapolation to complete fiducial phase space using charged and neutral particles:
- same as before, but use all particles (charged and neutral) with pT(track) &gt; 400 MeV and |eta(track)|&lt;2.5, excluding dressed leptons
- pass charged particles into kT algorithm using R=0.4 or R=1.0
DOI: 10.17182/hepdata.76968.v1/t1
title: "Table 1" of "Measurement of the I=1/2 $K \pi$ $\mathcal{S}$-wave amplitude from Dalitz plot analyses of $\eta_c \to K \bar K \pi$ in two-photon interactions"

description: Measured amplitude and phase values for the $I=1/2$ $K \pi$ $\mathcal{S}$-wave as functions of mass obtained from the Model Independent Partial Wave Analysis (MIPWA) of $\eta_c \to K^0_{\scriptscriptstyle S} K^{\pm}\pi^{\mp}$. The amplitudes and phases in the mass interval 14 are fixed to constant values.
description: SLAC-PEP2. We study the processes $\gamma \gamma \to K^0_s K^{\pm}\pi^{\mp}$ and $\gamma \gamma \to K^+ K^- \pi^0$ using a data sample of 519 fb$^{-1}$ recorded with the BaBar detector operating at the SLAC PEP-II asymmetric-energy $e^+ e^-$ collider at center-of-mass energies at and near the $\Upsilon(nS)$ ($n = 2,3,4$) resonances. We observe $\eta_c$ decays to both final states and perform Dalitz plot analyses using a model-independent partial wave analysis technique. This allows a model-independent measurement of the mass-dependence of the $I=1/2$ $K \pi$ $\mathcal{S}$-wave amplitude and phase. A comparison between the present measurement and those from previous experiments indicates similar behaviour for the phase up to a mass of 1.5 GeV$/c^2$. In contrast, the amplitudes show very marked differences. The data require the presence of a new $a_0(1950)$ resonance with parameters $m=1931 \pm 14 \pm 22 $MeV$/c^2$ and $\Gamma=271 \pm 22 \pm 29 \ $MeV.