• Open Access

Study of W boson production in association with beauty and charm

R. Aaij et al. (LHCb Collaboration)
Phys. Rev. D 92, 052001 – Published 8 September 2015

Abstract

The associated production of a W boson with a jet originating from either a light parton or heavy-flavor quark is studied in the forward region using proton-proton collisions. The analysis uses data corresponding to integrated luminosities of 1.0 and 2.0fb1 collected with the LHCb detector at center-of-mass energies of 7 and 8 TeV, respectively. The W bosons are reconstructed using the Wμν decay and muons with a transverse momentum, pT, larger than 20 GeV in the pseudorapidity range 2.0<η<4.5. The partons are reconstructed as jets with pT>20GeV and 2.2<η<4.2. The sum of the muon and jet momenta must satisfy pT>20GeV. The fraction of W+jet events that originate from beauty and charm quarks is measured, along with the charge asymmetries of the W+b and W+c production cross sections. The ratio of the W+jet to Z+jet production cross sections is also measured using the Zμμ decay. All results are in agreement with Standard Model predictions.

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  • Received 3 June 2015

DOI:https://doi.org/10.1103/PhysRevD.92.052001

This article is available under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.

© 2015 CERN, for the LHCb Collaboration

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Vol. 92, Iss. 5 — 1 September 2015

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