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Study of Drell-Yan dimuon production in proton-lead collisions at $\sqrt{s_\mathrm{NN}} =$ 8.16 TeV

The collaboration
CMS-HIN-18-003, 2021.

Abstract (data abstract)
Differential cross sections for the Drell-Yan process, including Z boson production, using the dimuon decay channel are measured in proton-lead (pPb) collisions at a nucleon-nucleon centre-of-mass energy of 8.16 TeV. A data sample recorded with the CMS detector at the LHC is used, corresponding to an integrated luminosity of 173 nb$^{-1}$. The differential cross section as a function of the dimuon mass is measured in the range 15-600 GeV, for the first time in proton-nucleus collisions. It is also reported as a function of dimuon rapidity over the mass ranges 15-60 GeV and 60-120 GeV, and ratios for the p-going over the Pb-going beam directions are built. In both mass ranges, the differential cross sections as functions of the dimuon transverse momentum $p_\textrm{T}$ and of a geometric variable $\phi^{*}$ are measured, where $\phi^{*}$ highly correlates with $p_\textrm{T}$ but is determined with higher precision. In the Z mass region, the rapidity dependence of the data indicate a modification of the distribution of partons within a lead nucleus as compared to the proton case. The data are more precise than predictions based upon current models of parton distributions.

• #### Table 1

Data from Figure 5 a

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Differential fiducial cross section (without the acceptance correction) for the DY process measured in the muon channel, as a function...

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Data from Figure 5 b

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Differential fiducial cross section (without the acceptance correction) for the DY process measured in the muon channel, as a function...

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Data from Figure 5 c

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Differential fiducial cross section (without the acceptance correction) for the DY process measured in the muon channel, as a function...

• #### Table 4

Data from Figure 6 a

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Differential fiducial cross section (without the acceptance correction) for the DY process measured in the muon channel, as a function...

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Data from Figure 6 b

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Differential fiducial cross section (without the acceptance correction) for the DY process measured in the muon channel, as a function...

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Data from Figure 6 c

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Differential fiducial cross section (without the acceptance correction) for the DY process measured in the muon channel, as a function...

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Data from Figure 6 d

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Differential fiducial cross section (without the acceptance correction) for the DY process measured in the muon channel, as a function...

• #### Table 8

Paper text (Section 3)

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Integrated fiducial cross section for the DY process measured in the muon channel. The quoted error is the quadratic sum...

• #### Table 9

Data from Figure 7 a

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Differential cross section for the DY process measured in the muon channel, as a function of dimuon invariant mass. The...

• #### Table 10

Data from Figure 7 b

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Differential cross section for the DY process measured in the muon channel, as a function of rapidity in the centre-of-mass...

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Data from Figure 7 c

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Differential cross section for the DY process measured in the muon channel, as a function of rapidity in the centre-of-mass...

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Data from Figure 8 a

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Differential cross section for the DY process measured in the muon channel, as a function of $p_{\textrm{T}}$ for $15<m_{\mu\mu}<60$ GeV....

• #### Table 13

Data from Figure 8 b

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Differential cross section for the DY process measured in the muon channel, as a function of $p_{\textrm{T}}$ for $60<m_{\mu\mu}<120$ GeV....

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Data from Figure 8 c

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Differential cross section for the DY process measured in the muon channel, as a function of $\phi^*$ for $15<m_{\mu\mu}<60$ GeV....

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Data from Figure 8 d

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Differential cross section for the DY process measured in the muon channel, as a function of $\phi^*$ for $60<m_{\mu\mu}<120$ GeV....

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Paper text (Section 3)

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Integrated cross section for the DY process measured in the muon channel. The quoted error is the quadratic sum of...

• #### Table 17

Data from Figure 9 a

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Forward-backward ratios for $15<m_{\mu\mu}<60$ GeV. Quoted uncertainties are the quadratic sum of the statistical and systematic uncertainties.

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Data from Figure 9 b

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Forward-backward ratios for $60<m_{\mu\mu}<120$ GeV. Quoted uncertainties are the quadratic sum of the statistical and systematic uncertainties.

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Data from Figure 3 a

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Correlation matrix for the systematic uncertainties, excluding integrated luminosity, as a function of dimuon invariant mass.

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Data from Figure 3 b

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Correlation matrix for the systematic uncertainties, excluding integrated luminosity, as a function of rapidity in the centre-of-mass frame for $15<m_{\mu\mu}<60$...

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Data from Figure 3 c

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Correlation matrix for the systematic uncertainties, excluding integrated luminosity, as a function of rapidity in the centre-of-mass frame for $60<m_{\mu\mu}<120$...

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Data from Figure 4 a

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Correlation matrix for the systematic uncertainties, excluding integrated luminosity, as a function of $p_{\textrm{T}}$ for $15<m_{\mu\mu}<60$ GeV.

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Data from Figure 4 b

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Correlation matrix for the systematic uncertainties, excluding integrated luminosity, as a function of $p_{\textrm{T}}$ for $60<m_{\mu\mu}<120$ GeV.

• #### Table 24

Data from Figure 4 c

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Correlation matrix for the systematic uncertainties, excluding integrated luminosity, as a function of $\phi^*$ for $15<m_{\mu\mu}<60$ GeV.

• #### Table 25

Data from Figure 4 d

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Correlation matrix for the systematic uncertainties, excluding integrated luminosity, as a function of $\phi^*$ for $60<m_{\mu\mu}<120$ GeV.

• #### Table 26

Data from Figure 3

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Correlation matrix for the systematic uncertainties, excluding integrated luminosity, as a function of rapidity in the centre-of-mass frame, putting together...

• #### Table 27

Data from Figure 4

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Correlation matrix for the systematic uncertainties, excluding integrated luminosity, as a function of $p_{\textrm{T}}$, putting together low and high masses....

• #### Table 28

Data from Figure 4

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Correlation matrix for the systematic uncertainties, excluding integrated luminosity, as a function of $\phi^*$, putting together low and high masses....