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

The Lhcb Collaboration

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

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 (US)
Article number30
JournalJournal of High Energy Physics
Volume2016
Issue number10
DOIs
StatePublished - Oct 1 2016

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collisions
cross sections
luminosity
transverse momentum
center of mass
leptons
electrons
bosons
quantum chromodynamics
asymmetry
energy
decay
predictions

Keywords

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

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Measurement of forward W → eν production in pp collisions at √s=8 TeV. / The Lhcb Collaboration.

In: Journal of High Energy Physics, Vol. 2016, No. 10, 30, 01.10.2016.

Research output: Contribution to journalArticle

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abstract = "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.]",
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author = "{The Lhcb Collaboration} and R. Aaij and B. Adeva and M. Adinolfi and Z. Ajaltouni and S. Akar and J. Albrecht and F. Alessio and M. Alexander and S. Ali and G. Alkhazov and {Alvarez Cartelle}, P. and Alves, {A. A.} and S. Amato and S. Amerio and Y. Amhis and L. An and L. Anderlini and G. Andreassi and M. Andreotti and Andrews, {J. E.} and Appleby, {R. B.} and {Aquines Gutierrez}, O. and F. Archilli and P. d’Argent and {Arnau Romeu}, J. and A. Artamonov and M. Artuso and Marina Artuso and G. Auriemma and M. Baalouch and I. Babuschkin and S. Bachmann and Back, {J. J.} and A. Badalov and C. Baesso and W. Baldini and Barlow, {R. J.} and C. Barschel and S. Barsuk and W. Barter and V. Batozskaya and B. Batsukh and V. Battista and A. Bay and L. Beaucourt and J. Beddow and Blusk, {Steven Roy} and Matthew Rudolph and Tomasz Skwarnicki and Sheldon Stone",
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N2 - 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.]

AB - 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.]

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