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

The ATLAS 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

    10.17182/hepdata.76541.v1/t1

    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

    10.17182/hepdata.76541.v1/t3

    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

    10.17182/hepdata.76541.v1/t4

    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

    10.17182/hepdata.76541.v1/t5

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

  • Table 6

    Paper Table 10

    10.17182/hepdata.76541.v1/t6

    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

    10.17182/hepdata.76541.v1/t7

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

  • Table 8

    Paper Figure 16

    10.17182/hepdata.76541.v1/t8

    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

    10.17182/hepdata.76541.v1/t34

    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

    10.17182/hepdata.76541.v1/t35

    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

    10.17182/hepdata.76541.v1/t36

    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

    10.17182/hepdata.76541.v1/t52

    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

    10.17182/hepdata.76541.v1/t53

    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...

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