Study of W boson production in association with beauty and charm
Name
PhysRevD.92.052001.pdf
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Author(s)
Aaij, R.
Adeva, B.
Adinolfi, M.
Affolder, A.
Ajaltouni, Z.
Akar, S.
Albrecht, J.
Alessio, F.
Alexander, M.
Ali, S.
Date Issued
September 2015
Journal
Physical Review D
Publisher
American Physical Society
Citation
Aaij, R., et al. "Study of W boson production in association with beauty and charm." Phys. Rev. D 92, 052001 (September 2015). © 2015 CERN, for the LHCb Collaboration
Version
Final published version
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 2.0 fb[superscript -1] collected with the LHCb detector at center-of-mass energies of 7 and 8 TeV, respectively. The W bosons are reconstructed using the W → μν decay and muons with a transverse momentum, p[subscript T], larger than 20 GeV in the pseudorapidity range 2.0 < η < 4.5. The partons are reconstructed as jets with p[subscript T] > 20 GeV and 2.2 < η < 4.2. The sum of the muon and jet momenta must satisfy p[subscript T] > 20 GeV. 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 Z → μμ decay. All results are in agreement with Standard Model predictions.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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DOI of Published Version
http://dx.doi.org/10.1103/PhysRevD.92.052001
