Measurement of forward W → eν production in pp collisions at √s=8 TeV

LHCb Collaboration

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)
91 Downloads (Pure)


A measurement of the cross-section for W → eν production in pp collisions is presented using data corresponding to an integrated luminosity of 2 fb−1 collected by the LHCb experiment at a centre-of-mass energy of √s=8 TeV. The electrons are required to have more than 20 GeV of transverse momentum and to lie between 2.00 and 4.25 in pseudorapidity. The inclusive W production cross-sections, where the W decays to eν, are measured to be (Formula presented.) where the first uncertainties are statistical, the second are systematic, the third are due to the knowledge of the LHC beam energy and the fourth are due to the luminosity determination. Differential cross-sections as a function of the electron pseudorapidity are measured. The W+/W cross-section ratio and production charge asymmetry are also reported. Results are compared with theoretical predictions at next-to-next-to-leading order in perturbative quantum chromodynamics. Finally, in a precise test of lepton universality, the ratio of W boson branching fractions is determined to be B(W → eν)=B(W → µν) = 1:020 ± 0:002 ± 0:019 where the first uncertainty is statistical and the second is systematic.[Figure not available: see fulltext.]

Original languageEnglish
Article number30
JournalJournal of High Energy Physics
Issue number10
Publication statusPublished - 7 Oct 2016


  • Electroweak interaction
  • Hadron-Hadron scattering (experiments)
  • QCD

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


Dive into the research topics of 'Measurement of forward W → eν production in pp collisions at √s=8 TeV'. Together they form a unique fingerprint.

Cite this