cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.17182/hepdata.88283.v1/t8
title: "Figure 5.1" of "Strange hadron production in pp and pPb collisions at $\sqrt{s_\mathrm{NN}}= $ 5.02 TeV"

description: Invariant $p_{T}$-differential spectra of ${K_{0}}^{S}$ in p+Pb at $\sqrt{s}$=5.02 TeV in various $y_{CM}$ ranges
description: The transverse momentum $p_{T}$ distributions of $\Lambda$, $\Xi-$, and $\Omega-$ baryons, their antiparticles, and ${K_{0}}^{S}$ mesons are measured in proton-proton (pp) and proton-lead (pPb) collisions at a nucleon-nucleon center-of-mass energy of 5.02 TeV over a broad rapidity range. The data, corresponding to integrated luminosities of 40.2 $nb^{−1}$ and 15.6 $μb^{−1}$ for pp and pPb collisions, respectively, were collected by the CMS experiment. The nuclear modification factor $R_{pPb}$, which is defined as the ratio of the particle yield in pPb collisions and a scaled pp reference, is measured for each particle. A strong dependence on particle species is observed in the $p_{T}$ range from 2 to 7 GeV, where $R_{pPb}$ for ${K_{0}}^{S}$ is consistent with unity, while an enhancement ordered by strangeness content and/or particle mass is observed for the three baryons. In pPb collisions, the strange hadron production is asymmetric about the nucleon-nucleon center-of-mass rapidity. Enhancements, which depend on the particle type, are observed in the direction of the Pb beam. The results are compared with predictions from EPOS LHC, which includes parametrized radial flow. The model is in qualitative agreement with the $R_{pPb}$ data, but fails to describe the dependence on particle species in the yield asymmetries measured away from midrapidity in pPb collisions.
DOI: 10.17182/hepdata.88283.v1/t10
title: "Figure 6.1" of "Strange hadron production in pp and pPb collisions at $\sqrt{s_\mathrm{NN}}= $ 5.02 TeV"

description: $Y_{asym}$ in p+Pb at $\sqrt{s}$=5.02 TeV in 0.3 &lt; $y_{CM}$ &lt; 0.8
description: The transverse momentum $p_{T}$ distributions of $\Lambda$, $\Xi-$, and $\Omega-$ baryons, their antiparticles, and ${K_{0}}^{S}$ mesons are measured in proton-proton (pp) and proton-lead (pPb) collisions at a nucleon-nucleon center-of-mass energy of 5.02 TeV over a broad rapidity range. The data, corresponding to integrated luminosities of 40.2 $nb^{−1}$ and 15.6 $μb^{−1}$ for pp and pPb collisions, respectively, were collected by the CMS experiment. The nuclear modification factor $R_{pPb}$, which is defined as the ratio of the particle yield in pPb collisions and a scaled pp reference, is measured for each particle. A strong dependence on particle species is observed in the $p_{T}$ range from 2 to 7 GeV, where $R_{pPb}$ for ${K_{0}}^{S}$ is consistent with unity, while an enhancement ordered by strangeness content and/or particle mass is observed for the three baryons. In pPb collisions, the strange hadron production is asymmetric about the nucleon-nucleon center-of-mass rapidity. Enhancements, which depend on the particle type, are observed in the direction of the Pb beam. The results are compared with predictions from EPOS LHC, which includes parametrized radial flow. The model is in qualitative agreement with the $R_{pPb}$ data, but fails to describe the dependence on particle species in the yield asymmetries measured away from midrapidity in pPb collisions.
DOI: 10.17182/hepdata.88283.v1/t11
title: "Figure 6.2" of "Strange hadron production in pp and pPb collisions at $\sqrt{s_\mathrm{NN}}= $ 5.02 TeV"

description: $Y_{asym}$ in p+Pb at $\sqrt{s}$=5.02 TeV in 0.8 &lt; $y_{CM}$ &lt; 1.3
description: The transverse momentum $p_{T}$ distributions of $\Lambda$, $\Xi-$, and $\Omega-$ baryons, their antiparticles, and ${K_{0}}^{S}$ mesons are measured in proton-proton (pp) and proton-lead (pPb) collisions at a nucleon-nucleon center-of-mass energy of 5.02 TeV over a broad rapidity range. The data, corresponding to integrated luminosities of 40.2 $nb^{−1}$ and 15.6 $μb^{−1}$ for pp and pPb collisions, respectively, were collected by the CMS experiment. The nuclear modification factor $R_{pPb}$, which is defined as the ratio of the particle yield in pPb collisions and a scaled pp reference, is measured for each particle. A strong dependence on particle species is observed in the $p_{T}$ range from 2 to 7 GeV, where $R_{pPb}$ for ${K_{0}}^{S}$ is consistent with unity, while an enhancement ordered by strangeness content and/or particle mass is observed for the three baryons. In pPb collisions, the strange hadron production is asymmetric about the nucleon-nucleon center-of-mass rapidity. Enhancements, which depend on the particle type, are observed in the direction of the Pb beam. The results are compared with predictions from EPOS LHC, which includes parametrized radial flow. The model is in qualitative agreement with the $R_{pPb}$ data, but fails to describe the dependence on particle species in the yield asymmetries measured away from midrapidity in pPb collisions.
DOI: 10.17182/hepdata.88283.v1/t12
title: "Figure 6.3" of "Strange hadron production in pp and pPb collisions at $\sqrt{s_\mathrm{NN}}= $ 5.02 TeV"

description: $Y_{asym}$ in p+Pb at $\sqrt{s}$=5.02 TeV in 1.3 &lt; $y_{CM}$ &lt; 1.8
description: The transverse momentum $p_{T}$ distributions of $\Lambda$, $\Xi-$, and $\Omega-$ baryons, their antiparticles, and ${K_{0}}^{S}$ mesons are measured in proton-proton (pp) and proton-lead (pPb) collisions at a nucleon-nucleon center-of-mass energy of 5.02 TeV over a broad rapidity range. The data, corresponding to integrated luminosities of 40.2 $nb^{−1}$ and 15.6 $μb^{−1}$ for pp and pPb collisions, respectively, were collected by the CMS experiment. The nuclear modification factor $R_{pPb}$, which is defined as the ratio of the particle yield in pPb collisions and a scaled pp reference, is measured for each particle. A strong dependence on particle species is observed in the $p_{T}$ range from 2 to 7 GeV, where $R_{pPb}$ for ${K_{0}}^{S}$ is consistent with unity, while an enhancement ordered by strangeness content and/or particle mass is observed for the three baryons. In pPb collisions, the strange hadron production is asymmetric about the nucleon-nucleon center-of-mass rapidity. Enhancements, which depend on the particle type, are observed in the direction of the Pb beam. The results are compared with predictions from EPOS LHC, which includes parametrized radial flow. The model is in qualitative agreement with the $R_{pPb}$ data, but fails to describe the dependence on particle species in the yield asymmetries measured away from midrapidity in pPb collisions.
DOI: 10.17182/hepdata.88283.v1/t9
title: "Figure 5.2" of "Strange hadron production in pp and pPb collisions at $\sqrt{s_\mathrm{NN}}= $ 5.02 TeV"

description: Invariant $p_{T}$-differential spectra of $\Lambda + \bar{\Lambda}$ in p+Pb at $\sqrt{s}$=5.02 TeV in various $y_{CM}$ ranges
description: The transverse momentum $p_{T}$ distributions of $\Lambda$, $\Xi-$, and $\Omega-$ baryons, their antiparticles, and ${K_{0}}^{S}$ mesons are measured in proton-proton (pp) and proton-lead (pPb) collisions at a nucleon-nucleon center-of-mass energy of 5.02 TeV over a broad rapidity range. The data, corresponding to integrated luminosities of 40.2 $nb^{−1}$ and 15.6 $μb^{−1}$ for pp and pPb collisions, respectively, were collected by the CMS experiment. The nuclear modification factor $R_{pPb}$, which is defined as the ratio of the particle yield in pPb collisions and a scaled pp reference, is measured for each particle. A strong dependence on particle species is observed in the $p_{T}$ range from 2 to 7 GeV, where $R_{pPb}$ for ${K_{0}}^{S}$ is consistent with unity, while an enhancement ordered by strangeness content and/or particle mass is observed for the three baryons. In pPb collisions, the strange hadron production is asymmetric about the nucleon-nucleon center-of-mass rapidity. Enhancements, which depend on the particle type, are observed in the direction of the Pb beam. The results are compared with predictions from EPOS LHC, which includes parametrized radial flow. The model is in qualitative agreement with the $R_{pPb}$ data, but fails to describe the dependence on particle species in the yield asymmetries measured away from midrapidity in pPb collisions.
DOI: 10.17182/hepdata.88284.v1/t1
title: "Table 1" of "Observation of nuclear modifications in W$^\pm$ boson production in pPb collisions at $\sqrt{s_\mathrm{NN}} =$ 8.16 TeV"

description: Muon charge asymmetry, $(N_{\mu}^{+} - N_{\mu}^{-})/(N_{\mu}^{+} + N_{\mu}^{-})$, as a function of the muon pseudorapidity in the centre-of-mass frame.
description: CERN-LHC. The production of W bosons is studied in proton-lead (pPb) collisions at a nucleon-nucleon centre-of-mass energy of $\sqrt{{s}_\textrm{NN}} = 8.16$ TeV. Measurements are performed in the $\textrm{W}^{\pm}\to\mu^{\pm}\nu$ channel using a data sample corresponding to an integrated luminosity of $173.4 \pm 8.7 \textrm{nb}^{-1}$, collected by the CMS Collaboration at the LHC. The number of positively and negatively charged W bosons is determined separately in the muon pseudorapidity region in the laboratory frame $|\eta_{\textrm{lab}}^{\mu}|&lt;2.4$ and transverse momentum $p_{\textrm{T}}^{\mu}&gt;25$~GeV/$c$. The $\textrm{W}^{\pm}$ boson differential cross sections, muon charge asymmetry, and the ratios of $\textrm{W}^{\pm}$ boson yields for the proton-going over the Pb-going beam directions are reported as a function of the muon pseudorapidity in the nucleon-nucleon centre-of-mass frame. The measurements are compared to the predictions from theoretical calculations based on parton distribution functions (PDFs) at next-to-leading-order. The results favour PDF calculations that include nuclear modifications and provide constraints on the nuclear PDF global fits.
DOI: 10.17182/hepdata.88284.v1/t2
title: "Table 2" of "Observation of nuclear modifications in W$^\pm$ boson production in pPb collisions at $\sqrt{s_\mathrm{NN}} =$ 8.16 TeV"

description: Differential production cross sections for $\textrm{pPb} \to W^{+} + X \to \mu^{+} \nu + X$ for positively charged muons of $p_T$ larger than 25 GeV$/c$, in nanobarns, as a function of the muon pseudorapidity in the centre-of-mass frame. The global normalisation uncertainty of 3.5% is listed separately.
description: CERN-LHC. The production of W bosons is studied in proton-lead (pPb) collisions at a nucleon-nucleon centre-of-mass energy of $\sqrt{{s}_\textrm{NN}} = 8.16$ TeV. Measurements are performed in the $\textrm{W}^{\pm}\to\mu^{\pm}\nu$ channel using a data sample corresponding to an integrated luminosity of $173.4 \pm 8.7 \textrm{nb}^{-1}$, collected by the CMS Collaboration at the LHC. The number of positively and negatively charged W bosons is determined separately in the muon pseudorapidity region in the laboratory frame $|\eta_{\textrm{lab}}^{\mu}|&lt;2.4$ and transverse momentum $p_{\textrm{T}}^{\mu}&gt;25$~GeV/$c$. The $\textrm{W}^{\pm}$ boson differential cross sections, muon charge asymmetry, and the ratios of $\textrm{W}^{\pm}$ boson yields for the proton-going over the Pb-going beam directions are reported as a function of the muon pseudorapidity in the nucleon-nucleon centre-of-mass frame. The measurements are compared to the predictions from theoretical calculations based on parton distribution functions (PDFs) at next-to-leading-order. The results favour PDF calculations that include nuclear modifications and provide constraints on the nuclear PDF global fits.
DOI: 10.17182/hepdata.88284.v1/t3
title: "Table 3" of "Observation of nuclear modifications in W$^\pm$ boson production in pPb collisions at $\sqrt{s_\mathrm{NN}} =$ 8.16 TeV"

description: Differential production cross sections for $\textrm{pPb} \to W^{-} + X \to \mu^{-} \bar{\nu} + X$ for negatively charged muons of $p_T$ larger than 25 GeV$/c$, in nanobarns, as a function of the muon pseudorapidity in the centre-of-mass frame. The global normalisation uncertainty of 3.5% is listed separately.
description: CERN-LHC. The production of W bosons is studied in proton-lead (pPb) collisions at a nucleon-nucleon centre-of-mass energy of $\sqrt{{s}_\textrm{NN}} = 8.16$ TeV. Measurements are performed in the $\textrm{W}^{\pm}\to\mu^{\pm}\nu$ channel using a data sample corresponding to an integrated luminosity of $173.4 \pm 8.7 \textrm{nb}^{-1}$, collected by the CMS Collaboration at the LHC. The number of positively and negatively charged W bosons is determined separately in the muon pseudorapidity region in the laboratory frame $|\eta_{\textrm{lab}}^{\mu}|&lt;2.4$ and transverse momentum $p_{\textrm{T}}^{\mu}&gt;25$~GeV/$c$. The $\textrm{W}^{\pm}$ boson differential cross sections, muon charge asymmetry, and the ratios of $\textrm{W}^{\pm}$ boson yields for the proton-going over the Pb-going beam directions are reported as a function of the muon pseudorapidity in the nucleon-nucleon centre-of-mass frame. The measurements are compared to the predictions from theoretical calculations based on parton distribution functions (PDFs) at next-to-leading-order. The results favour PDF calculations that include nuclear modifications and provide constraints on the nuclear PDF global fits.
DOI: 10.17182/hepdata.88284.v1/t4
title: "Table 4" of "Observation of nuclear modifications in W$^\pm$ boson production in pPb collisions at $\sqrt{s_\mathrm{NN}} =$ 8.16 TeV"

description: Forward-backward ratio, $N_{\mu}(+\eta_{\textrm{CM}})/N_{\mu}(-\eta_{\textrm{CM}})$, for the negatively charged muons, as a function of the muon pseudorapidity in the centre-of-mass frame.
description: CERN-LHC. The production of W bosons is studied in proton-lead (pPb) collisions at a nucleon-nucleon centre-of-mass energy of $\sqrt{{s}_\textrm{NN}} = 8.16$ TeV. Measurements are performed in the $\textrm{W}^{\pm}\to\mu^{\pm}\nu$ channel using a data sample corresponding to an integrated luminosity of $173.4 \pm 8.7 \textrm{nb}^{-1}$, collected by the CMS Collaboration at the LHC. The number of positively and negatively charged W bosons is determined separately in the muon pseudorapidity region in the laboratory frame $|\eta_{\textrm{lab}}^{\mu}|&lt;2.4$ and transverse momentum $p_{\textrm{T}}^{\mu}&gt;25$~GeV/$c$. The $\textrm{W}^{\pm}$ boson differential cross sections, muon charge asymmetry, and the ratios of $\textrm{W}^{\pm}$ boson yields for the proton-going over the Pb-going beam directions are reported as a function of the muon pseudorapidity in the nucleon-nucleon centre-of-mass frame. The measurements are compared to the predictions from theoretical calculations based on parton distribution functions (PDFs) at next-to-leading-order. The results favour PDF calculations that include nuclear modifications and provide constraints on the nuclear PDF global fits.
DOI: 10.17182/hepdata.88284.v1/t5
title: "Table 5" of "Observation of nuclear modifications in W$^\pm$ boson production in pPb collisions at $\sqrt{s_\mathrm{NN}} =$ 8.16 TeV"

description: Forward-backward ratio, $N_{\mu}(+\eta_{\textrm{CM}})/N_{\mu}(-\eta_{\textrm{CM}})$, for the positively charged muons, as a function of the muon pseudorapidity in the centre-of-mass frame.
description: CERN-LHC. The production of W bosons is studied in proton-lead (pPb) collisions at a nucleon-nucleon centre-of-mass energy of $\sqrt{{s}_\textrm{NN}} = 8.16$ TeV. Measurements are performed in the $\textrm{W}^{\pm}\to\mu^{\pm}\nu$ channel using a data sample corresponding to an integrated luminosity of $173.4 \pm 8.7 \textrm{nb}^{-1}$, collected by the CMS Collaboration at the LHC. The number of positively and negatively charged W bosons is determined separately in the muon pseudorapidity region in the laboratory frame $|\eta_{\textrm{lab}}^{\mu}|&lt;2.4$ and transverse momentum $p_{\textrm{T}}^{\mu}&gt;25$~GeV/$c$. The $\textrm{W}^{\pm}$ boson differential cross sections, muon charge asymmetry, and the ratios of $\textrm{W}^{\pm}$ boson yields for the proton-going over the Pb-going beam directions are reported as a function of the muon pseudorapidity in the nucleon-nucleon centre-of-mass frame. The measurements are compared to the predictions from theoretical calculations based on parton distribution functions (PDFs) at next-to-leading-order. The results favour PDF calculations that include nuclear modifications and provide constraints on the nuclear PDF global fits.
DOI: 10.17182/hepdata.88284.v1/t6
title: "Table 6" of "Observation of nuclear modifications in W$^\pm$ boson production in pPb collisions at $\sqrt{s_\mathrm{NN}} =$ 8.16 TeV"

description: Forward-backward ratio, $N_{\mu}(+\eta_{\textrm{CM}})/N_{\mu}(-\eta_{\textrm{CM}})$, for muons of both signs, as a function of the muon pseudorapidity in the centre-of-mass frame.
description: CERN-LHC. The production of W bosons is studied in proton-lead (pPb) collisions at a nucleon-nucleon centre-of-mass energy of $\sqrt{{s}_\textrm{NN}} = 8.16$ TeV. Measurements are performed in the $\textrm{W}^{\pm}\to\mu^{\pm}\nu$ channel using a data sample corresponding to an integrated luminosity of $173.4 \pm 8.7 \textrm{nb}^{-1}$, collected by the CMS Collaboration at the LHC. The number of positively and negatively charged W bosons is determined separately in the muon pseudorapidity region in the laboratory frame $|\eta_{\textrm{lab}}^{\mu}|&lt;2.4$ and transverse momentum $p_{\textrm{T}}^{\mu}&gt;25$~GeV/$c$. The $\textrm{W}^{\pm}$ boson differential cross sections, muon charge asymmetry, and the ratios of $\textrm{W}^{\pm}$ boson yields for the proton-going over the Pb-going beam directions are reported as a function of the muon pseudorapidity in the nucleon-nucleon centre-of-mass frame. The measurements are compared to the predictions from theoretical calculations based on parton distribution functions (PDFs) at next-to-leading-order. The results favour PDF calculations that include nuclear modifications and provide constraints on the nuclear PDF global fits.
DOI: 10.17182/hepdata.88284.v1/t7
title: "Table 7" of "Observation of nuclear modifications in W$^\pm$ boson production in pPb collisions at $\sqrt{s_\mathrm{NN}} =$ 8.16 TeV"

description: The covariance matrix of the W boson differential cross section measurements. Each bin is labeled mi_i or pl_i, where mi stands for $W^{-} \to \mu^{-} \bar{\nu}$ channel and pl for $W^{+} \to \mu^{+} \nu$ channel, and 0 &lt;= i &lt;= 23 is the bin number in $\eta_{\textrm{CM}}$ (from -2.86 - -2.60 to 1.80 - 1.93). The global normalisation uncertainty of 3.5% is included. Data from Figure 2.
description: CERN-LHC. The production of W bosons is studied in proton-lead (pPb) collisions at a nucleon-nucleon centre-of-mass energy of $\sqrt{{s}_\textrm{NN}} = 8.16$ TeV. Measurements are performed in the $\textrm{W}^{\pm}\to\mu^{\pm}\nu$ channel using a data sample corresponding to an integrated luminosity of $173.4 \pm 8.7 \textrm{nb}^{-1}$, collected by the CMS Collaboration at the LHC. The number of positively and negatively charged W bosons is determined separately in the muon pseudorapidity region in the laboratory frame $|\eta_{\textrm{lab}}^{\mu}|&lt;2.4$ and transverse momentum $p_{\textrm{T}}^{\mu}&gt;25$~GeV/$c$. The $\textrm{W}^{\pm}$ boson differential cross sections, muon charge asymmetry, and the ratios of $\textrm{W}^{\pm}$ boson yields for the proton-going over the Pb-going beam directions are reported as a function of the muon pseudorapidity in the nucleon-nucleon centre-of-mass frame. The measurements are compared to the predictions from theoretical calculations based on parton distribution functions (PDFs) at next-to-leading-order. The results favour PDF calculations that include nuclear modifications and provide constraints on the nuclear PDF global fits.
DOI: 10.17182/hepdata.88288.v1/t1
title: "Table 1" of "Multiparticle correlation studies in pPb collisions at $\sqrt{s_\mathrm{NN}} =$ 8.16 TeV"

description: $v_2\{4\}$ as a function of $N_{trk}^{offline}$ in PbPb collisions at $\sqrt{s_{NN}} = 5.02$ TeV.
description: The second- and third-order azimuthal anisotropy Fourier harmonics of charged particles produced in pPb collisions, at $\sqrt{s_{_{\mathrmNN)}}}=8.16\text{TeV}$, are studied over a wide range of event multiplicities. Multiparticle correlations are used to isolate global properties stemming from the collision overlap geometry. The second-order ``elliptic'' harmonic moment is obtained with high precision through four-, six-, and eight-particle correlations and, for the first time, the third-order ``triangular'' harmonic moment is studied using four-particle correlations. A sample of peripheral PbPb collisions at $\sqrt{s_{_{\mathrmNN)}}}=5.02\text{TeV}$ that covers a similar range of event multiplicities as the pPb results is also analyzed. Model calculations of initial-state fluctuations in pPb and PbPb collisions can be directly compared to the high precision experimental results. This work provides new insight into the fluctuation-driven origin of the $v_3$ coefficients in pPb and PbPb collisions, and into the dominating overall collision geometry in PbPb collisions at the earliest stages of heavy ion interactions.
DOI: 10.17182/hepdata.88288.v1/t2
title: "Table 2" of "Multiparticle correlation studies in pPb collisions at $\sqrt{s_\mathrm{NN}} =$ 8.16 TeV"

description: $v_2\{6\}$ as a function of $N_{trk}^{offline}$ in PbPb collisions at $\sqrt{s_{NN}} = 5.02$ TeV.
description: The second- and third-order azimuthal anisotropy Fourier harmonics of charged particles produced in pPb collisions, at $\sqrt{s_{_{\mathrmNN)}}}=8.16\text{TeV}$, are studied over a wide range of event multiplicities. Multiparticle correlations are used to isolate global properties stemming from the collision overlap geometry. The second-order ``elliptic'' harmonic moment is obtained with high precision through four-, six-, and eight-particle correlations and, for the first time, the third-order ``triangular'' harmonic moment is studied using four-particle correlations. A sample of peripheral PbPb collisions at $\sqrt{s_{_{\mathrmNN)}}}=5.02\text{TeV}$ that covers a similar range of event multiplicities as the pPb results is also analyzed. Model calculations of initial-state fluctuations in pPb and PbPb collisions can be directly compared to the high precision experimental results. This work provides new insight into the fluctuation-driven origin of the $v_3$ coefficients in pPb and PbPb collisions, and into the dominating overall collision geometry in PbPb collisions at the earliest stages of heavy ion interactions.
DOI: 10.17182/hepdata.88288.v1/t3
title: "Table 3" of "Multiparticle correlation studies in pPb collisions at $\sqrt{s_\mathrm{NN}} =$ 8.16 TeV"

description: $v_2\{8\}$ as a function of $N_{trk}^{offline}$ in PbPb collisions at $\sqrt{s_{NN}} = 5.02$ TeV.
description: The second- and third-order azimuthal anisotropy Fourier harmonics of charged particles produced in pPb collisions, at $\sqrt{s_{_{\mathrmNN)}}}=8.16\text{TeV}$, are studied over a wide range of event multiplicities. Multiparticle correlations are used to isolate global properties stemming from the collision overlap geometry. The second-order ``elliptic'' harmonic moment is obtained with high precision through four-, six-, and eight-particle correlations and, for the first time, the third-order ``triangular'' harmonic moment is studied using four-particle correlations. A sample of peripheral PbPb collisions at $\sqrt{s_{_{\mathrmNN)}}}=5.02\text{TeV}$ that covers a similar range of event multiplicities as the pPb results is also analyzed. Model calculations of initial-state fluctuations in pPb and PbPb collisions can be directly compared to the high precision experimental results. This work provides new insight into the fluctuation-driven origin of the $v_3$ coefficients in pPb and PbPb collisions, and into the dominating overall collision geometry in PbPb collisions at the earliest stages of heavy ion interactions.