Determination of the muonic branching ratio of the W boson and its total width via cross-section measurements at the Tevatron and LHC

Abstract

The total $W$-boson decay width ${\Gamma }_W$ is an important observable which allows testing of the standard model. The current world average value is based on direct measurements of final state kinematic properties of $W$-boson decays, and has a relative uncertainty of 2%. The indirect determination of ${\Gamma }_W$ via the cross-section measurements of vector-boson production can lead to a similar accuracy. The same methodology leads also to a determination of the leptonic branching ratio. This approach has been successfully pursued by the CDF and D0 experiments at the Tevatron collider, as well as by the CMS collaboration at the LHC. In this paper we present for the first time a combination of the available measurements at hadron colliders, accounting for the correlations of the associated systematic uncertainties. Our combination leads to values of $\text{BR}(W\to \mu \nu )=(10.72\pm 0.16)\%$ and ${\Gamma }_W=2113\pm 31$ MeV, respectively, both compatible with the current world averages.

arXiv comment11 pages, 2 figures

References in corpus (19)

• A Brief Introduction to PYTHIA 8.1
• Event generation with SHERPA 1.1
• Parton distributions in the LHC era: MMHT 2014 PDFs
• Global QCD Analysis of Parton Structure of the Nucleon: CTEQ5 Parton Distributions
• Vector boson production at hadron colliders: a fully exclusive QCD calculation at NNLO
• Electroweak Measurements in Electron-Positron Collisions at W-Boson-Pair Energies at LEP
• FEWZ 2.0: A code for hadronic Z production at next-to-next-to-leading order
• The global electroweak fit at NNLO and prospects for the LHC and ILC
• The CT10 NNLO Global Analysis of QCD
• Uncertainties of predictions from parton distribution functions II: the Hessian method
• NLO Higgs boson production via gluon fusion matched with shower in POWHEG
• Soft gluon effects on lepton pairs at hadron colliders
• The Nonperturbative Regime in QCD Resummation for Gauge Boson Production at Hadron Colliders
• Measurements of Inclusive W and Z Cross Sections in p-pbar Collisions at sqrt{s} =1.96 TeV
• Measurement of inclusive W and Z boson production cross sections in pp collisions at sqrt(s) = 8 TeV
• Nonperturbative contributions to a resummed leptonic angular distribution in inclusive neutral vector boson production
• Searches for Gauge-Mediated Supersymmetry Breaking Topologies in e+e- collisions at LEP2
• Oblique Corrections To The W Width
• A direct Measurement of the W Boson Width in ppbar Collisions at sqrt(s) = 1.96 TeV

Cited by in corpus (5)

• Drell-Yan lepton-pair production: $q_T$ resummation at N${}^3$LL accuracy and fiducial cross sections at N${}^3$LO
• Electroweak Precision Tests of the Standard Model after the Discovery of the Higgs Boson
• DYTurbo: Fast predictions for Drell-Yan processes
• Combining QED and QCD transverse-momentum resummation for W and Z boson production at hadron colliders
• Master integrals for mixed QCD-QED corrections to charged-current Drell-Yan production of a massive charged lepton