Determination of the strong coupling constant ${\alpha }_S(m_{\mathrm{Z}})$ from measurements of inclusive W${}^{\pm }$ and Z boson production cross sections in proton-proton collisions at $\sqrt{s}=$ 7 and 8 TeV

Abstract

Twelve measurements of inclusive cross sections of W${}^{\pm }$ and Z boson production, performed in proton-proton collisions at centre-of-mass energies of 7 and 8 TeV, are compared with perturbative quantum chromodynamics calculations at next-to-next-to-leading order (NNLO) accuracy obtained with the CT14, HERAPDF2.0, MMHT14, and NNPDF3.0 parton distribution functions (PDFs). Data and theory agree well for all PDF sets, taking into account the experimental and theoretical uncertainties. A novel procedure is employed to extract the strong coupling constant at the Z pole mass from a detailed comparison of all the experimental fiducial cross sections to the corresponding NNLO theoretical predictions, yielding ${\alpha }_S(m_{\mathrm{Z}})=$ 0.1163 ${}_{-0.0031}^{+0.0024}$ (CT14), 0.1072 ${}_{-0.0040}^{+0.0043}$ (HERAPDF2.0), 0.1186 $\pm$ 0.0025 (MMHT14), and 0.1147 $\pm$ 0.0023 (NNPDF3.0). Using the results obtained with the CT14 and MMHT14 PDFs, which yield the most robust and stable ${\alpha }_S(m_{\mathrm{Z}})$ extractions, a value ${\alpha }_S(m_{\mathrm{Z}})=$ 0.1175 ${}_{-0.0028}^{+0.0025}$ is determined.

arXiv commentReplaced with the published version. Added the journal reference and the DOI. All the figures and tables can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/SMP-18-05 (CMS Public Pages)

References in corpus (29)

• Parton distributions for the LHC
• Parton distributions for the LHC Run II
• LHAPDF6: parton density access in the LHC precision era
• Parton distributions from high-precision collider data
• PDF4LHC recommendations for LHC Run II
• New parton distribution functions from a global analysis of quantum chromodynamics
• Parton distributions in the LHC era: MMHT 2014 PDFs
• Investigating the near-criticality of the Higgs boson
• High-precision QCD at hadron colliders: electroweak gauge boson rapidity distributions at NNLO
• The CMS trigger system
• First Look at the Physics Case of TLEP
• Combining QCD and electroweak corrections to dilepton production in FEWZ
• Update of the global electroweak fit and constraints on two-Higgs-doublet models
• Handbook of LHC Higgs Cross Sections: 2. Differential Distributions
• Measurement of the Inclusive W and Z Production Cross Sections in pp Collisions at sqrt(s) = 7 TeV
• Color singlet production at NNLO in MCFM
• Illuminating the photon content of the proton within a global PDF analysis
• Measurement of the $\mathrm{t}\overline{\mathrm{t}}$ production cross section, the top quark mass, and the strong coupling constant using dilepton events in pp collisions at $\sqrt{s}=$ 13 TeV
• Measurement of inclusive W and Z boson production cross sections in pp collisions at sqrt(s) = 8 TeV
• APFEL Web: a web-based application for the graphical visualization of parton distribution functions
• Precision Studies of Observables in pp->W->l nu and pp->gamma,Z->l+l- processes at the LHC
• QCD$\oplus$QED NNLO corrections to Drell Yan production
• NLO EW and QCD proton-proton cross section calculations with mcsanc-v1.01
• On the combination of correlated estimates of a physics observable
• The MSR Mass and the $\mathcal{O}({\Lambda }_{\mathrm{QCD}})$ Renormalon Sum Rule
• Determination of the strong coupling constant ${\alpha }_s(m_Z)$ from measurements of the total cross section for top-antitop quark production
• A method and tool for combining differential or inclusive measurements obtained with simultaneously constrained uncertainties
• Challenging Asymptotic Freedom
• Strong Coupling Running, Gauge Coupling Unification and the Scale of New Physics

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• The Large Hadron-Electron Collider at the HL-LHC
• QCD Running Couplings and Effective Charges
• Constraints on the initial state of PbPb collisions via measurements of Z boson yields and azimuthal anisotropy at $\sqrt{s_{\mathrm{NN}}}=$ 5.02 TeV
• Precision QCD Physics at the LHC
• Measurement of multijet azimuthal correlations and determination of the strong coupling in proton-proton collisions at $\sqrt{s}$ = 13 TeV
• Experimental QCD summary (ICHEP 2020)
• Anomalous scaling of linear power corrections