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Precision measurement and interpretation of inclusive $W^+$, $W^-$ and $Z/\gamma^*$ production cross sections with the ATLAS detector

The collaboration
No Journal Information, 2016

Abstract (data abstract)
CERN-LHC. High-precision measurements by the ATLAS Collaboration are presented of inclusive $W^+\to\ell^+\nu$, $W^-\to\ell^-\bar{\nu}$ and $Z/\gamma^*\to\ell\ell$ ($\ell=e,\mu$) Drell--Yan production cross sections at the LHC. The data were collected in proton--proton collisions at $\sqrt{s} = 7$ TeV with an integrated luminosity of 4.6 fb$^{-1}$. Differential $W^+$ and $W^-$ cross sections are measured in a lepton pseudorapidity range $|\eta_{\ell}| = 2.5$. Differential $Z/\gamma^*$ cross sections are measured as a function of the absolute dilepton rapidity, for $|y_{\ell\ell}| < 3.6$, for three intervals of dilepton mass, $m_{\ell\ell}$, extending from 46 to 150 GeV. The integrated and differential electron- and muon-channel cross sections are combined and compared to theoretical predictions using recent sets of parton distribution functions. The data, together with the final inclusive $e^{\pm}p$ scattering cross-section data from H1 and ZEUS, are interpreted in a next-to-next-to-leading-order QCD analysis, and a new set of parton distribution functions, ATLAS-epWZ16, is obtained. The ratio of strange-to-light sea-quark densities in the proton is determined more accurately than in previous determinations based on collider data only, and is established to be close to unity in the sensitivity range of the data. A new measurement of the CKM matrix element $|V_{cs}|$ is also provided. The differential cross sections are provided in two forms, a version with summarised uncertainties as in the paper tables and as "attached resource" files in HerAverager/xFitter format detailing all sources of correlated uncertainties separately. In addition to the experimental results, detailed information on the theoretical predictions are provided as required to reproduce the interpretation.

• #### Table 1

Paper Table 2

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Fiducial cross sections times branching ratios for $W^+$, $W^-$, central and forward $Z/\gamma^*$ ($m_{ee} = 66-116$ GeV) production in the...

• #### Table 2

Paper Table 5

10.17182/hepdata.76541.v1/t2

Fiducial cross sections times branching ratios for $W^+$, $W^-$ and $Z/\gamma^*$ ($m_{\mu\mu} = 66-116$ GeV) production in the muon decay...

• #### Table 3

Paper Table 7

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Integrated fiducial cross sections times leptonic branching ratios in the electron and muon channels and their combination with statistical and...

• #### Table 4

Paper Table 8

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Ratios of integrated fiducial CC and NC cross sections obtained from the combination of electron and muon channels with statistical...

• #### Table 5

Paper Table 9

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Total cross sections times leptonic branching ratios obtained from the combination of electron and muon channels with statistical and systematic...

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Paper Table 10

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Ratios of total CC and NC cross sections obtained from the combination of electron and muon channels with statistical and...

• #### Table 7

Paper Figure 19

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The correlation coefficients of the $W^+$, $W^-$ and $Z$ fiducial cross-section measurements.

• #### Table 8

Paper Figure 16

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Measurement of the electron-to-muon cross-section ratios for the $W$ and $Z$ production, $R_W$ and $R_Z$. The uncertainties denote the statistical...

• #### Table 9

Paper Table 12 (top)

10.17182/hepdata.76541.v1/t9

Differential cross section for the $W^+ \to \ell^+\nu$ processes combined from $\ell = e, \mu$ decays extrapolated to the common...

• #### Table 10

Paper Table 12 (bottom)

10.17182/hepdata.76541.v1/t10

Differential cross section for the $W^- \to \ell^-\bar{\nu}$ processes combined from $\ell = e, \mu$ decays extrapolated to the common...

• #### Table 11

Paper Table 13 (top)

10.17182/hepdata.76541.v1/t11

Differential cross section for the central $Z/\gamma^* \to \ell\ell$ processes in the invariant mass region $46 < m_{\ell\ell} < 66$...

• #### Table 12

Paper Table 13 (middle)

10.17182/hepdata.76541.v1/t12

Differential cross section for the central $Z/\gamma^* \to \ell\ell$ processes in the invariant mass region $66 < m_{\ell\ell} < 116$...

• #### Table 13

Paper Table 13 (bottom)

10.17182/hepdata.76541.v1/t13

Differential cross section for the central $Z/\gamma^* \to \ell\ell$ processes in the invariant mass region $116 < m_{\ell\ell} < 150$...

• #### Table 14

Paper Table 14 (top)

10.17182/hepdata.76541.v1/t14

Differential cross section for the forward $Z/\gamma^* \to \ell\ell$ processes in the invariant mass region $66 < m_{\ell\ell} < 116$...

• #### Table 15

Paper Table 14 (bottom)

10.17182/hepdata.76541.v1/t15

Differential cross section for the forward $Z/\gamma^* \to \ell\ell$ processes in the invariant mass region $116 < m_{\ell\ell} < 150$...

• #### Table 16

Paper Table 23 (left)

10.17182/hepdata.76541.v1/t16

Differential cross section for the $W^- \to e^-\bar{\nu}$ process extrapolated to the common fiducial region. The statistical, uncorrelated systematic, correlated...

• #### Table 17

Paper Table 23 (right)

10.17182/hepdata.76541.v1/t17

Differential cross section for the $W^+ \to e^+\nu$ process extrapolated to the common fiducial region. The statistical, uncorrelated systematic, correlated...

• #### Table 18

Paper Table 24

10.17182/hepdata.76541.v1/t18

Differential cross section for the central $Z/\gamma^* \to ee$ process in the invariant mass region $46 < m_{\ell\ell} < 66$...

• #### Table 19

Paper Table 25 (left)

10.17182/hepdata.76541.v1/t19

Differential cross section for the central $Z/\gamma^* \to ee$ process in the invariant mass region $66 < m_{\ell\ell} < 116$...

• #### Table 20

Paper Table 25 (right)

10.17182/hepdata.76541.v1/t20

Differential cross section for the forward $Z/\gamma^* \to ee$ process in the invariant mass region $66 < m_{\ell\ell} < 116$...

• #### Table 21

Paper Table 26 (left)

10.17182/hepdata.76541.v1/t21

Differential cross section for the central $Z/\gamma^* \to ee$ process in the invariant mass region $116 < m_{\ell\ell} < 150$...

• #### Table 22

Paper Table 26 (right)

10.17182/hepdata.76541.v1/t22

Differential cross section for the forward $Z/\gamma^* \to ee$ process in the invariant mass region $116 < m_{\ell\ell} < 150$...

• #### Table 23

Paper Table 27 (left)

10.17182/hepdata.76541.v1/t23

Differential cross section for the $W^- \to \mu^-\bar{\nu}$ process extrapolated to the common fiducial region. The statistical, uncorrelated systematic, correlated...

• #### Table 24

Paper Table 27 (right)

10.17182/hepdata.76541.v1/t24

Differential cross section for the $W^+ \to \mu^+\nu$ process extrapolated to the common fiducial region. The statistical, uncorrelated systematic, correlated...

• #### Table 25

Paper Table 28

10.17182/hepdata.76541.v1/t25

Differential cross section for the central $Z/\gamma^* \to \mu\mu$ process in the invariant mass region $66 < m_{\ell\ell} < 116$...

• #### Table 26

Paper Table 29

10.17182/hepdata.76541.v1/t26

Differential cross section for the central $Z/\gamma^* \to \mu\mu$ process in the invariant mass region $46 < m_{\ell\ell} < 66$...

• #### Table 27

Paper Table 29

10.17182/hepdata.76541.v1/t27

Differential cross section for the central $Z/\gamma^* \to \mu\mu$ process in the invariant mass region $116 < m_{\ell\ell} < 150$...

• #### Table 28

Auxiliary Table 9

10.17182/hepdata.76541.v1/t28

Values of $E(W[Z])$ and $A(W[Z])$ correction factors for integrated $W\to\ell\nu$ and $Z\to\ell\ell$ measurements together with the total estimated uncertainties in...

• #### Table 29

Auxiliary Table 10

10.17182/hepdata.76541.v1/t29

Values of $E(W)$ correction factors for the differential $W\to\ell\nu$ measurements together with the total estimated uncertainties in percent. The separate...

• #### Table 30

Auxiliary Table 11

10.17182/hepdata.76541.v1/t30

Values of $E(Z)$ correction factors for the differential $Z/\gamma^*\to e^+e^-$ measurements together with the total estimated uncertainties in percent. The...

• #### Table 31

Auxiliary Table 12

10.17182/hepdata.76541.v1/t31

Values of $E(Z)$ correction factors for the differential $Z/\gamma^*\to \mu^+\mu^-$ measurements together with the total estimated uncertainties in percent. The...

• #### Table 32

Auxiliary Table 13

10.17182/hepdata.76541.v1/t32

Values of $E(Z)$ correction factors for the differential forward $Z/\gamma^*\to e^+e^-$ measurements together with the total estimated uncertainties in percent....

• #### Table 33

Auxiliary Table 14

10.17182/hepdata.76541.v1/t33

Correlation coefficients between integrated cross sections extrapolated to the total phase space, $\sigma^\mathrm{tot}_{W \to \ell\nu}$ and $\sigma^\mathrm{tot}_{Z/\gamma^* \to \ell\ell}$ for...

• #### Table 34

Auxiliary Table 15

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Correlation coefficients between integrated fiducial cross sections in electron and muon channels for $W^{\pm}$ and $Z$. Values are given including...

• #### Table 35

Auxiliary Table 16

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The differential W charge asymmetry $A_{\ell}$ as defined in Eq. (19) from the combined electron and muon channel measurements. All...

• #### Table 36

Paper Table 16

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Combined NNLO QCD and NLO EW predictions as defined in Eq. (15), c.f. Section 6.1.2 and Ref. [110] Chapter III.2.3,...

• #### Table 37

Paper Figure 21a

10.17182/hepdata.76541.v1/t37

Combined NNLO QCD and NLO EW predictions as defined in Eq. (15), c.f. Section 6.1.2 and Ref. [110] Chapter III.2.3,...

• #### Table 38

Paper Figure 21b

10.17182/hepdata.76541.v1/t38

Combined NNLO QCD and NLO EW predictions as defined in Eq. (15), c.f. Section 6.1.2 and Ref. [110] Chapter III.2.3,...

• #### Table 39

Paper Figure 22

10.17182/hepdata.76541.v1/t39

Combined NNLO QCD and NLO EW predictions as defined in Eq. (15), c.f. Section 6.1.2 and Ref. [110] Chapter III.2.3,...

• #### Table 40

Paper Figure 24a

10.17182/hepdata.76541.v1/t40

Combined NNLO QCD and NLO EW predictions as defined in Eq. (15), c.f. Section 6.1.2 and Ref. [110] Chapter III.2.3,...

• #### Table 41

Paper Figure 23a

10.17182/hepdata.76541.v1/t41

Combined NNLO QCD and NLO EW predictions as defined in Eq. (15), c.f. Section 6.1.2 and Ref. [110] Chapter III.2.3,...

• #### Table 42

Paper Figure 24b

10.17182/hepdata.76541.v1/t42

Combined NNLO QCD and NLO EW predictions as defined in Eq. (15), c.f. Section 6.1.2 and Ref. [110] Chapter III.2.3,...

• #### Table 43

Paper Figure 23b

10.17182/hepdata.76541.v1/t43

Combined NNLO QCD and NLO EW predictions as defined in Eq. (15), c.f. Section 6.1.2 and Ref. [110] Chapter III.2.3,...

• #### Table 44

Paper Figure 24c

10.17182/hepdata.76541.v1/t44

Combined NNLO QCD and NLO EW predictions as defined in Eq. (15), c.f. Section 6.1.2 and Ref. [110] Chapter III.2.3,...

• #### Table 45

10.17182/hepdata.76541.v1/t45

Nominal NNLO QCD + NLO EW $K_f$-factors as defined in Eq. (20) for the differential $W^+ \to \ell^+\nu$ process. The...

• #### Table 46

10.17182/hepdata.76541.v1/t46

Nominal NNLO QCD + NLO EW $K_f$-factors as defined in Eq. (20) for the differential $W^- \to \ell^-\bar{\nu}$ process. The...

• #### Table 47

10.17182/hepdata.76541.v1/t47

Nominal NNLO QCD + NLO EW $K_f$-factors as defined in Eq. (20) for the differential central $Z/\gamma^* \to \ell\ell$ process...

• #### Table 48

10.17182/hepdata.76541.v1/t48

Nominal NNLO QCD + NLO EW $K_f$-factors as defined in Eq. (20) for the differential central $Z/\gamma^* \to \ell\ell$ process...

• #### Table 49

10.17182/hepdata.76541.v1/t49

Nominal NNLO QCD + NLO EW $K_f$-factors as defined in Eq. (20) for the differential central $Z/\gamma^* \to \ell\ell$ process...

• #### Table 50

10.17182/hepdata.76541.v1/t50

Nominal NNLO QCD + NLO EW $K_f$-factors as defined in Eq. (20) for the differential forward $Z/\gamma^* \to \ell\ell$ process...

• #### Table 51

10.17182/hepdata.76541.v1/t51

Nominal NNLO QCD + NLO EW $K_f$-factors as defined in Eq. (20) for the differential forward $Z/\gamma^* \to \ell\ell$ process...

• #### Table 52

Paper Table 16

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Correction factors estimated from Powheg+Pythia6+Photos samples, c.f. Section 2.2, to convert the integrated common fiducial cross-section measurements from Born QED...

• #### Table 53

Paper Figure 21a

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Correction factors estimated from Powheg+Pythia6+Photos samples, c.f. Section 2.2, to convert the differential common fiducial $W^+ \to e^+\nu$ cross-section measurements...

• #### Table 54

Paper Figure 21b

10.17182/hepdata.76541.v1/t54

Correction factors estimated from Powheg+Pythia6+Photos samples, c.f. Section 2.2, to convert the differential common fiducial $W^- \to e^-\bar{\nu}$ cross-section measurements...

• #### Table 55

Paper Figure 22

10.17182/hepdata.76541.v1/t55

Correction factors estimated from Powheg+Pythia6+Photos samples, c.f. Section 2.2, to convert the differential common fiducial $W^+ \to \mu^+\nu$ cross-section measurements...

• #### Table 56

Paper Figure 24a

10.17182/hepdata.76541.v1/t56

Correction factors estimated from Powheg+Pythia6+Photos samples, c.f. Section 2.2, to convert the differential common fiducial $W^- \to \mu^-\bar{\nu}$ cross-section measurements...

• #### Table 57

Paper Figure 23a

10.17182/hepdata.76541.v1/t57

Correction factors estimated from Powheg+Pythia6+Photos samples, c.f. Section 2.2, to convert the differential common fiducial central $Z/\gamma^* \to ee$ cross-section...

• #### Table 58

Paper Figure 24b

10.17182/hepdata.76541.v1/t58

Correction factors estimated from Powheg+Pythia6+Photos samples, c.f. Section 2.2, to convert the differential common fiducial central $Z/\gamma^* \to \mu\mu$ cross-section...

• #### Table 59

Paper Figure 23b

10.17182/hepdata.76541.v1/t59

Correction factors estimated from Powheg+Pythia6+Photos samples, c.f. Section 2.2, to convert the differential common fiducial forward $Z/\gamma^* \to ee$ cross-section...