Measurement of the forward Z boson production cross-section in pp collisions at $\sqrt{s} = 13$ TeV

The collaboration
JHEP 09 (2016) 136, 2016.

Abstract
A measurement of the production cross-section of Z bosons in pp collisions at $\sqrt{s} = 13$ TeV is presented using dimuon and dielectron final states in LHCb data. The cross-section is measured for leptons with pseudorapidities in the range $2.0 < \eta < 4.5$, transverse momenta $p_\text{T} > 20$ GeV and dilepton invariant mass in the range $60<m(\ell\ell)<120$ GeV. The integrated cross-section from averaging the two final states is \begin{equation*}\sigma_{\text{Z}}^{\ell\ell} = 194.3 \pm 0.9 \pm 3.3 \pm 7.6\text{ pb,}\end{equation*} where the first uncertainty is statistical, the second is due to systematic effects, and the third is due to the luminosity determination. In addition, differential cross-sections are measured as functions of the Z boson rapidity, transverse momentum and the angular variable $\phi^*_\eta$.

• #### Table 2a

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The FSR correction applied as a function of the boson rapidity for muons.

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The FSR correction applied as a function of the boson rapidity for electrons.

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The FSR correction applied as a function of $\phi ^ * _ \eta$ for muons.

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The FSR correction applied as a function of $\phi ^ * _ \eta$ for electrons.

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The FSR correction applied as a function of the boson transverse momentum.

• #### Table 5a

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The measured differential cross-sections as a function of the boson rapidity for muons. The first uncertainty is due to the...

• #### Table 5b

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The measured differential cross-sections as a function of the boson rapidity for electrons. The first uncertainty is due to the...

• #### Table 6a

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The measured differential cross-sections as a function of $\phi ^ * _ \eta$ for muons. The first uncertainty is due...

• #### Table 6b

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The measured differential cross-sections as a function of $\phi ^ * _ \eta$ for electrons. The first uncertainty is due...

• #### Table 7

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The measured differential cross-sections as a function of pT . The first uncertainty is due to the size of the...

• #### Table 8

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The correlation matrix for the differential cross-section measurement as a function of Z boson rapidity, for the dimuon final state,...

• #### Table 9

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The correlation matrix for the differential cross-section measurements as a function of the Z boson rapidity, for the dielectron final...

• #### Table 10

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The correlation matrix for the differential cross-section measurement as a function of $\phi ^ * _ \eta$ , for the...

• #### Table 11

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The correlation matrix for the differential cross-section measurements as a function of $\phi ^ * _ \eta$ , for the...

• #### Table 12

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The correlation matrix for the differential cross-section measurements as a function of boson pT , for the dimuon final state,...