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Measurement of forward W → eν production in pp collisions at s=8 TeV
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LHCb collaboration (Including: Back, J. J., Blake, Thomas, Costa Sobral, Cayo, Crocombe, Andrew, Gershon, T. J., Kreps, Michal, Latham, Thomas, Loh, David, Mathad, Abhijit , O'Hanlon, Daniel P., Poluektov, Anton, Wallace, Charlotte and Wicht, Jean). (2016) Measurement of forward W → eν production in pp collisions at s=8 TeV. Journal of High Energy Physics, 2016 (10). 30. doi:10.1007/jhep10(2016)030 ISSN 1029-8479.
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Official URL: http://dx.doi.org/10.1007/jhep10(2016)030
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 σW+→e+νe=1124.4±2.1±21.5±11.2±13.0pb,σW−→e−ν¯e=809.0±1.9±18.1±7.0±9.4pb, 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 ℬW→eν/ℬW→μν=1.020±0.002±0.019, where the first uncertainty is statistical and the second is systematic.
Item Type: | Journal Article | ||||||
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||
SWORD Depositor: | Library Publications Router | ||||||
Journal or Publication Title: | Journal of High Energy Physics | ||||||
Publisher: | Springer Berlin Heidelberg | ||||||
ISSN: | 1029-8479 | ||||||
Official Date: | 7 October 2016 | ||||||
Dates: |
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Volume: | 2016 | ||||||
Number: | 10 | ||||||
Article Number: | 30 | ||||||
DOI: | 10.1007/jhep10(2016)030 | ||||||
Status: | Peer Reviewed | ||||||
Publication Status: | Published | ||||||
Access rights to Published version: | Open Access (Creative Commons) |
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