cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.17182/hepdata.151650.v1/t29
title: "Hypertriton ratio 2" of "Measurements of chemical potentials in Pb-Pb collisions at $\sqrt{s_{\rm NN}} = 5.02$ TeV"

description: $c\mathrm{t}$-differential ${}_{\overline{\Lambda}}^{3}\overline{\mathrm{H}} / ^{3}_{\Lambda}\mathrm{H}$ antiparticle-to-particle yield ratio, 5-10% centrality
description: No data abstract available.
DOI: 10.17182/hepdata.151650.v1/t30
title: "Hypertriton ratio 3" of "Measurements of chemical potentials in Pb-Pb collisions at $\sqrt{s_{\rm NN}} = 5.02$ TeV"

description: $c\mathrm{t}$-differential ${}_{\overline{\Lambda}}^{3}\overline{\mathrm{H}} / ^{3}_{\Lambda}\mathrm{H}$ antiparticle-to-particle yield ratio, 10-30% centrality
description: No data abstract available.
DOI: 10.17182/hepdata.151650.v1/t31
title: "Hypertriton ratio 4" of "Measurements of chemical potentials in Pb-Pb collisions at $\sqrt{s_{\rm NN}} = 5.02$ TeV"

description: $c\mathrm{t}$-differential ${}_{\overline{\Lambda}}^{3}\overline{\mathrm{H}} / ^{3}_{\Lambda}\mathrm{H}$ antiparticle-to-particle yield ratio, 30-50% centrality
description: No data abstract available.
DOI: 10.17182/hepdata.151650.v1/t32
title: "Triton ratio 1" of "Measurements of chemical potentials in Pb-Pb collisions at $\sqrt{s_{\rm NN}} = 5.02$ TeV"

description: $p_{\mathrm{T}}$-differential $^{3}\overline{\mathrm{H}} / ^{3}\mathrm{H}$ antiparticle-to-particle yield ratio, 0-5% centrality
description: No data abstract available.
DOI: 10.17182/hepdata.151650.v1/t33
title: "Triton ratio 2" of "Measurements of chemical potentials in Pb-Pb collisions at $\sqrt{s_{\rm NN}} = 5.02$ TeV"

description: $p_{\mathrm{T}}$-differential $^{3}\overline{\mathrm{H}} / ^{3}\mathrm{H}$ antiparticle-to-particle yield ratio, 5-10% centrality
description: No data abstract available.
DOI: 10.17182/hepdata.151650.v1/t34
title: "Triton ratio 3" of "Measurements of chemical potentials in Pb-Pb collisions at $\sqrt{s_{\rm NN}} = 5.02$ TeV"

description: $p_{\mathrm{T}}$-differential $^{3}\overline{\mathrm{H}} / ^{3}\mathrm{H}$ antiparticle-to-particle yield ratio, 10-30% centrality
description: No data abstract available.
DOI: 10.17182/hepdata.151650.v1/t35
title: "Triton ratio 4" of "Measurements of chemical potentials in Pb-Pb collisions at $\sqrt{s_{\rm NN}} = 5.02$ TeV"

description: $p_{\mathrm{T}}$-differential $^{3}\overline{\mathrm{H}} / ^{3}\mathrm{H}$ antiparticle-to-particle yield ratio, 30-50% centrality
description: No data abstract available.
DOI: 10.17182/hepdata.151650.v1/t36
title: "Triton ratio 5" of "Measurements of chemical potentials in Pb-Pb collisions at $\sqrt{s_{\rm NN}} = 5.02$ TeV"

description: $p_{\mathrm{T}}$-differential $^{3}\overline{\mathrm{H}} / ^{3}\mathrm{H}$ antiparticle-to-particle yield ratio, 50-90% centrality
description: No data abstract available.
DOI: 10.17182/hepdata.151650.v1/t37
title: "Helium ratio 1" of "Measurements of chemical potentials in Pb-Pb collisions at $\sqrt{s_{\rm NN}} = 5.02$ TeV"

description: $p_{\mathrm{T}}$-differential $^{3}\overline{\mathrm{He}} / ^{3}\mathrm{He}$ antiparticle-to-particle yield ratio, 0-5% centrality
description: No data abstract available.
DOI: 10.17182/hepdata.151650.v1/t38
title: "Helium ratio 2" of "Measurements of chemical potentials in Pb-Pb collisions at $\sqrt{s_{\rm NN}} = 5.02$ TeV"

description: $p_{\mathrm{T}}$-differential $^{3}\overline{\mathrm{He}} / ^{3}\mathrm{He}$ antiparticle-to-particle yield ratio, 5-10% centrality
description: No data abstract available.
DOI: 10.17182/hepdata.151650.v1/t39
title: "Helium ratio 3" of "Measurements of chemical potentials in Pb-Pb collisions at $\sqrt{s_{\rm NN}} = 5.02$ TeV"

description: $p_{\mathrm{T}}$-differential $^{3}\overline{\mathrm{He}} / ^{3}\mathrm{He}$ antiparticle-to-particle yield ratio, 10-30% centrality
description: No data abstract available.
DOI: 10.17182/hepdata.151650.v1/t40
title: "Helium ratio 4" of "Measurements of chemical potentials in Pb-Pb collisions at $\sqrt{s_{\rm NN}} = 5.02$ TeV"

description: $p_{\mathrm{T}}$-differential $^{3}\overline{\mathrm{He}} / ^{3}\mathrm{He}$ antiparticle-to-particle yield ratio, 30-50% centrality
description: No data abstract available.
DOI: 10.17182/hepdata.151650.v1/t41
title: "Helium ratio 5" of "Measurements of chemical potentials in Pb-Pb collisions at $\sqrt{s_{\rm NN}} = 5.02$ TeV"

description: $p_{\mathrm{T}}$-differential $^{3}\overline{\mathrm{He}} / ^{3}\mathrm{He}$ antiparticle-to-particle yield ratio, 50-90% centrality
description: No data abstract available.
DOI: 10.17182/hepdata.151650.v1/t42
title: "Total covariance matrix, muB vs. centrality" of "Measurements of chemical potentials in Pb-Pb collisions at $\sqrt{s_{\rm NN}} = 5.02$ TeV"

description: Total covariance matrix of the baryon chemical potential, $\mu_B$, extracted with the Thermal-FIST code, in the 0-5%, 5-10%, 10-30%, 30-50%, and 50-90% centrality classes
description: No data abstract available.
DOI: 10.17182/hepdata.151650.v1/t43
title: "Total covariance matrix, muQ vs. centrality" of "Measurements of chemical potentials in Pb-Pb collisions at $\sqrt{s_{\rm NN}} = 5.02$ TeV"

description: Total covariance matrix of the electric-charge chemical potential, $\mu_Q$, extracted with the Thermal-FIST code, in the 0-5%, 5-10%, 10-30%, 30-50%, and 50-90% centrality classes
description: No data abstract available.
DOI: 10.17182/hepdata.151650.v1/t44
title: "Chi square profile, muB (Thermal-FIST)" of "Measurements of chemical potentials in Pb-Pb collisions at $\sqrt{s_{\rm NN}} = 5.02$ TeV"

description: $\chi^{2}$ of the centrality-averaged baryon chemical potential, $\mu_B$, extracted with the Thermal-FIST code
description: No data abstract available.
DOI: 10.17182/hepdata.151650.v1/t45
title: "Chi square profile, muQ (Thermal-FIST)" of "Measurements of chemical potentials in Pb-Pb collisions at $\sqrt{s_{\rm NN}} = 5.02$ TeV"

description: $\chi^{2}$ of the centrality-averaged electric-charge chemical potential, $\mu_Q$, extracted with the Thermal-FIST code
description: No data abstract available.
DOI: 10.17182/hepdata.151650.v1/t46
title: "Chi square profile, muB (GSI-Heidelberg)" of "Measurements of chemical potentials in Pb-Pb collisions at $\sqrt{s_{\rm NN}} = 5.02$ TeV"

description: $\chi^{2}$ of the centrality-averaged baryon chemical potential, $\mu_Q$, extracted with the Thermal-FIST code
description: No data abstract available.
DOI: 10.17182/hepdata.160597.v1/t1
title: "Table 1" of "Light neutral-meson production in pp collisions at $\sqrt{s}$ = 13 TeV"

description: Invariant differential cross section of the $\pi^{0}$ versus transverse momentum for pp collisions at $\sqrt{s}$ = 13 TeV.
description: The momentum-differential invariant cross sections of $\pi^{0}$ and $\eta$ mesons are reported for pp collisions at $\sqrt{s}$ = 13 TeV at midrapidity ($|y|$ $&lt;$ 0.8). The measurement is performed in a broad transverse-momentum range of 0.2 $&lt; p_{\rm T} &lt;$ 200 GeV/$c$ and 0.4 $&lt; p_{\rm T} &lt;$ 60 GeV/$c$ for the $\pi^{0}$ and $\eta$, respectively, extending the $\eta$ coverage of previous measurements. Transverse-mass-scaling violation of up to 60% at low transverse momentum has been observed, agreeing with measurements at lower collision energies. Transverse Bjorken $x$ ($\eta$) scaling of the $\pi^{0}$ cross sections at LHC energies is fulfilled with a power-law exponent of $n$ = 5.01$\pm$0.05, consistent with values obtained for charged pions at similar collision energies. The data is compared to predictions from next-to-leading order perturbative QCD calculations, where the $\pi^{0}$ spectrum is best described using the CT18 parton distribution function and the NNFF1.0 or BDSS fragmentation function. Expectations from PYTHIA8 and EPOS LHC overestimate the spectrum for the $\pi^{0}$ and are not able to describe the shape and magnitude of the $\eta$ spectrum. The charged-particle multiplicity dependent $\pi^{0}$ and $\eta$ $p_{\rm T}$ spectra show the expected hardening with increasing multiplicity. This is demonstrated across a broad transverse-momentum range and up to events with a charged-particle multiplicity exceeding five times the mean value in minimum bias collisions. The absolute magnitude of the $\eta/\pi^{0}$ ratio shows a dependence on the charged-particle multiplicity for $p_{\rm T}$ $&lt;$ 4 GeV/$c$, qualitatively described by PYTHIA8 and EPOS LHC due to a rising contribution from feed-down of heavier particles to the $\pi^{0}$ spectrum.
DOI: 10.17182/hepdata.160597.v1/t2
title: "Table 2" of "Light neutral-meson production in pp collisions at $\sqrt{s}$ = 13 TeV"

description: Invariant differential cross section of the $\eta$ meson versus transverse momentum for pp collisions at $\sqrt{s}$ = 13 TeV.
description: The momentum-differential invariant cross sections of $\pi^{0}$ and $\eta$ mesons are reported for pp collisions at $\sqrt{s}$ = 13 TeV at midrapidity ($|y|$ $&lt;$ 0.8). The measurement is performed in a broad transverse-momentum range of 0.2 $&lt; p_{\rm T} &lt;$ 200 GeV/$c$ and 0.4 $&lt; p_{\rm T} &lt;$ 60 GeV/$c$ for the $\pi^{0}$ and $\eta$, respectively, extending the $\eta$ coverage of previous measurements. Transverse-mass-scaling violation of up to 60% at low transverse momentum has been observed, agreeing with measurements at lower collision energies. Transverse Bjorken $x$ ($\eta$) scaling of the $\pi^{0}$ cross sections at LHC energies is fulfilled with a power-law exponent of $n$ = 5.01$\pm$0.05, consistent with values obtained for charged pions at similar collision energies. The data is compared to predictions from next-to-leading order perturbative QCD calculations, where the $\pi^{0}$ spectrum is best described using the CT18 parton distribution function and the NNFF1.0 or BDSS fragmentation function. Expectations from PYTHIA8 and EPOS LHC overestimate the spectrum for the $\pi^{0}$ and are not able to describe the shape and magnitude of the $\eta$ spectrum. The charged-particle multiplicity dependent $\pi^{0}$ and $\eta$ $p_{\rm T}$ spectra show the expected hardening with increasing multiplicity. This is demonstrated across a broad transverse-momentum range and up to events with a charged-particle multiplicity exceeding five times the mean value in minimum bias collisions. The absolute magnitude of the $\eta/\pi^{0}$ ratio shows a dependence on the charged-particle multiplicity for $p_{\rm T}$ $&lt;$ 4 GeV/$c$, qualitatively described by PYTHIA8 and EPOS LHC due to a rising contribution from feed-down of heavier particles to the $\pi^{0}$ spectrum.
DOI: 10.17182/hepdata.160597.v1/t3
title: "Table 3" of "Light neutral-meson production in pp collisions at $\sqrt{s}$ = 13 TeV"

description: The $\eta/\pi^{0}$ ratio as a function of $p_{\rm T}$ for pp collisions at $\sqrt{s}$ = 13 TeV.
description: The momentum-differential invariant cross sections of $\pi^{0}$ and $\eta$ mesons are reported for pp collisions at $\sqrt{s}$ = 13 TeV at midrapidity ($|y|$ $&lt;$ 0.8). The measurement is performed in a broad transverse-momentum range of 0.2 $&lt; p_{\rm T} &lt;$ 200 GeV/$c$ and 0.4 $&lt; p_{\rm T} &lt;$ 60 GeV/$c$ for the $\pi^{0}$ and $\eta$, respectively, extending the $\eta$ coverage of previous measurements. Transverse-mass-scaling violation of up to 60% at low transverse momentum has been observed, agreeing with measurements at lower collision energies. Transverse Bjorken $x$ ($\eta$) scaling of the $\pi^{0}$ cross sections at LHC energies is fulfilled with a power-law exponent of $n$ = 5.01$\pm$0.05, consistent with values obtained for charged pions at similar collision energies. The data is compared to predictions from next-to-leading order perturbative QCD calculations, where the $\pi^{0}$ spectrum is best described using the CT18 parton distribution function and the NNFF1.0 or BDSS fragmentation function. Expectations from PYTHIA8 and EPOS LHC overestimate the spectrum for the $\pi^{0}$ and are not able to describe the shape and magnitude of the $\eta$ spectrum. The charged-particle multiplicity dependent $\pi^{0}$ and $\eta$ $p_{\rm T}$ spectra show the expected hardening with increasing multiplicity. This is demonstrated across a broad transverse-momentum range and up to events with a charged-particle multiplicity exceeding five times the mean value in minimum bias collisions. The absolute magnitude of the $\eta/\pi^{0}$ ratio shows a dependence on the charged-particle multiplicity for $p_{\rm T}$ $&lt;$ 4 GeV/$c$, qualitatively described by PYTHIA8 and EPOS LHC due to a rising contribution from feed-down of heavier particles to the $\pi^{0}$ spectrum.
DOI: 10.17182/hepdata.160597.v1/t4
title: "Table 4" of "Light neutral-meson production in pp collisions at $\sqrt{s}$ = 13 TeV"

description: Ratio of the $\eta/\pi^{0}$ ratio to the $m_{\rm T}$-scaling prediction as a function of $p_{\rm T}$ for pp collisions at $\sqrt{s}$ = 13 TeV.
description: The momentum-differential invariant cross sections of $\pi^{0}$ and $\eta$ mesons are reported for pp collisions at $\sqrt{s}$ = 13 TeV at midrapidity ($|y|$ $&lt;$ 0.8). The measurement is performed in a broad transverse-momentum range of 0.2 $&lt; p_{\rm T} &lt;$ 200 GeV/$c$ and 0.4 $&lt; p_{\rm T} &lt;$ 60 GeV/$c$ for the $\pi^{0}$ and $\eta$, respectively, extending the $\eta$ coverage of previous measurements. Transverse-mass-scaling violation of up to 60% at low transverse momentum has been observed, agreeing with measurements at lower collision energies. Transverse Bjorken $x$ ($\eta$) scaling of the $\pi^{0}$ cross sections at LHC energies is fulfilled with a power-law exponent of $n$ = 5.01$\pm$0.05, consistent with values obtained for charged pions at similar collision energies. The data is compared to predictions from next-to-leading order perturbative QCD calculations, where the $\pi^{0}$ spectrum is best described using the CT18 parton distribution function and the NNFF1.0 or BDSS fragmentation function. Expectations from PYTHIA8 and EPOS LHC overestimate the spectrum for the $\pi^{0}$ and are not able to describe the shape and magnitude of the $\eta$ spectrum. The charged-particle multiplicity dependent $\pi^{0}$ and $\eta$ $p_{\rm T}$ spectra show the expected hardening with increasing multiplicity. This is demonstrated across a broad transverse-momentum range and up to events with a charged-particle multiplicity exceeding five times the mean value in minimum bias collisions. The absolute magnitude of the $\eta/\pi^{0}$ ratio shows a dependence on the charged-particle multiplicity for $p_{\rm T}$ $&lt;$ 4 GeV/$c$, qualitatively described by PYTHIA8 and EPOS LHC due to a rising contribution from feed-down of heavier particles to the $\pi^{0}$ spectrum.
DOI: 10.17182/hepdata.160597.v1/t5
title: "Table 5" of "Light neutral-meson production in pp collisions at $\sqrt{s}$ = 13 TeV"

description: $x_{\rm T}$ scaled $\pi^{0}$ spectrum for pp collisions at $\sqrt{s}$ = 0.9 TeV, with $n = 5.01$.
description: The momentum-differential invariant cross sections of $\pi^{0}$ and $\eta$ mesons are reported for pp collisions at $\sqrt{s}$ = 13 TeV at midrapidity ($|y|$ $&lt;$ 0.8). The measurement is performed in a broad transverse-momentum range of 0.2 $&lt; p_{\rm T} &lt;$ 200 GeV/$c$ and 0.4 $&lt; p_{\rm T} &lt;$ 60 GeV/$c$ for the $\pi^{0}$ and $\eta$, respectively, extending the $\eta$ coverage of previous measurements. Transverse-mass-scaling violation of up to 60% at low transverse momentum has been observed, agreeing with measurements at lower collision energies. Transverse Bjorken $x$ ($\eta$) scaling of the $\pi^{0}$ cross sections at LHC energies is fulfilled with a power-law exponent of $n$ = 5.01$\pm$0.05, consistent with values obtained for charged pions at similar collision energies. The data is compared to predictions from next-to-leading order perturbative QCD calculations, where the $\pi^{0}$ spectrum is best described using the CT18 parton distribution function and the NNFF1.0 or BDSS fragmentation function. Expectations from PYTHIA8 and EPOS LHC overestimate the spectrum for the $\pi^{0}$ and are not able to describe the shape and magnitude of the $\eta$ spectrum. The charged-particle multiplicity dependent $\pi^{0}$ and $\eta$ $p_{\rm T}$ spectra show the expected hardening with increasing multiplicity. This is demonstrated across a broad transverse-momentum range and up to events with a charged-particle multiplicity exceeding five times the mean value in minimum bias collisions. The absolute magnitude of the $\eta/\pi^{0}$ ratio shows a dependence on the charged-particle multiplicity for $p_{\rm T}$ $&lt;$ 4 GeV/$c$, qualitatively described by PYTHIA8 and EPOS LHC due to a rising contribution from feed-down of heavier particles to the $\pi^{0}$ spectrum.
DOI: 10.17182/hepdata.160597.v1/t6
title: "Table 6" of "Light neutral-meson production in pp collisions at $\sqrt{s}$ = 13 TeV"

description: $x_{\rm T}$ scaled $\pi^{0}$ spectrum for pp collisions at $\sqrt{s}$ = 2.76 TeV, with $n = 5.01$.
description: The momentum-differential invariant cross sections of $\pi^{0}$ and $\eta$ mesons are reported for pp collisions at $\sqrt{s}$ = 13 TeV at midrapidity ($|y|$ $&lt;$ 0.8). The measurement is performed in a broad transverse-momentum range of 0.2 $&lt; p_{\rm T} &lt;$ 200 GeV/$c$ and 0.4 $&lt; p_{\rm T} &lt;$ 60 GeV/$c$ for the $\pi^{0}$ and $\eta$, respectively, extending the $\eta$ coverage of previous measurements. Transverse-mass-scaling violation of up to 60% at low transverse momentum has been observed, agreeing with measurements at lower collision energies. Transverse Bjorken $x$ ($\eta$) scaling of the $\pi^{0}$ cross sections at LHC energies is fulfilled with a power-law exponent of $n$ = 5.01$\pm$0.05, consistent with values obtained for charged pions at similar collision energies. The data is compared to predictions from next-to-leading order perturbative QCD calculations, where the $\pi^{0}$ spectrum is best described using the CT18 parton distribution function and the NNFF1.0 or BDSS fragmentation function. Expectations from PYTHIA8 and EPOS LHC overestimate the spectrum for the $\pi^{0}$ and are not able to describe the shape and magnitude of the $\eta$ spectrum. The charged-particle multiplicity dependent $\pi^{0}$ and $\eta$ $p_{\rm T}$ spectra show the expected hardening with increasing multiplicity. This is demonstrated across a broad transverse-momentum range and up to events with a charged-particle multiplicity exceeding five times the mean value in minimum bias collisions. The absolute magnitude of the $\eta/\pi^{0}$ ratio shows a dependence on the charged-particle multiplicity for $p_{\rm T}$ $&lt;$ 4 GeV/$c$, qualitatively described by PYTHIA8 and EPOS LHC due to a rising contribution from feed-down of heavier particles to the $\pi^{0}$ spectrum.
DOI: 10.17182/hepdata.160597.v1/t7
title: "Table 7" of "Light neutral-meson production in pp collisions at $\sqrt{s}$ = 13 TeV"

description: $x_{\rm T}$ scaled $\pi^{0}$ spectrum for pp collisions at $\sqrt{s}$ = 7 TeV, with $n = 5.01$.
description: The momentum-differential invariant cross sections of $\pi^{0}$ and $\eta$ mesons are reported for pp collisions at $\sqrt{s}$ = 13 TeV at midrapidity ($|y|$ $&lt;$ 0.8). The measurement is performed in a broad transverse-momentum range of 0.2 $&lt; p_{\rm T} &lt;$ 200 GeV/$c$ and 0.4 $&lt; p_{\rm T} &lt;$ 60 GeV/$c$ for the $\pi^{0}$ and $\eta$, respectively, extending the $\eta$ coverage of previous measurements. Transverse-mass-scaling violation of up to 60% at low transverse momentum has been observed, agreeing with measurements at lower collision energies. Transverse Bjorken $x$ ($\eta$) scaling of the $\pi^{0}$ cross sections at LHC energies is fulfilled with a power-law exponent of $n$ = 5.01$\pm$0.05, consistent with values obtained for charged pions at similar collision energies. The data is compared to predictions from next-to-leading order perturbative QCD calculations, where the $\pi^{0}$ spectrum is best described using the CT18 parton distribution function and the NNFF1.0 or BDSS fragmentation function. Expectations from PYTHIA8 and EPOS LHC overestimate the spectrum for the $\pi^{0}$ and are not able to describe the shape and magnitude of the $\eta$ spectrum. The charged-particle multiplicity dependent $\pi^{0}$ and $\eta$ $p_{\rm T}$ spectra show the expected hardening with increasing multiplicity. This is demonstrated across a broad transverse-momentum range and up to events with a charged-particle multiplicity exceeding five times the mean value in minimum bias collisions. The absolute magnitude of the $\eta/\pi^{0}$ ratio shows a dependence on the charged-particle multiplicity for $p_{\rm T}$ $&lt;$ 4 GeV/$c$, qualitatively described by PYTHIA8 and EPOS LHC due to a rising contribution from feed-down of heavier particles to the $\pi^{0}$ spectrum.
DOI: 10.17182/hepdata.160597.v1/t10
title: "Table 10" of "Light neutral-meson production in pp collisions at $\sqrt{s}$ = 13 TeV"

description: $x_{\rm T}$ scaled $\eta$ spectrum for pp collisions at $\sqrt{s}$ = 2.76 TeV, with $n = 4.91$.
description: The momentum-differential invariant cross sections of $\pi^{0}$ and $\eta$ mesons are reported for pp collisions at $\sqrt{s}$ = 13 TeV at midrapidity ($|y|$ $&lt;$ 0.8). The measurement is performed in a broad transverse-momentum range of 0.2 $&lt; p_{\rm T} &lt;$ 200 GeV/$c$ and 0.4 $&lt; p_{\rm T} &lt;$ 60 GeV/$c$ for the $\pi^{0}$ and $\eta$, respectively, extending the $\eta$ coverage of previous measurements. Transverse-mass-scaling violation of up to 60% at low transverse momentum has been observed, agreeing with measurements at lower collision energies. Transverse Bjorken $x$ ($\eta$) scaling of the $\pi^{0}$ cross sections at LHC energies is fulfilled with a power-law exponent of $n$ = 5.01$\pm$0.05, consistent with values obtained for charged pions at similar collision energies. The data is compared to predictions from next-to-leading order perturbative QCD calculations, where the $\pi^{0}$ spectrum is best described using the CT18 parton distribution function and the NNFF1.0 or BDSS fragmentation function. Expectations from PYTHIA8 and EPOS LHC overestimate the spectrum for the $\pi^{0}$ and are not able to describe the shape and magnitude of the $\eta$ spectrum. The charged-particle multiplicity dependent $\pi^{0}$ and $\eta$ $p_{\rm T}$ spectra show the expected hardening with increasing multiplicity. This is demonstrated across a broad transverse-momentum range and up to events with a charged-particle multiplicity exceeding five times the mean value in minimum bias collisions. The absolute magnitude of the $\eta/\pi^{0}$ ratio shows a dependence on the charged-particle multiplicity for $p_{\rm T}$ $&lt;$ 4 GeV/$c$, qualitatively described by PYTHIA8 and EPOS LHC due to a rising contribution from feed-down of heavier particles to the $\pi^{0}$ spectrum.