Study of $W$ boson production in association with beauty and charm - INSPIRE

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Study of $W$ boson production in association with beauty and charm

LHCb

Collaboration

May 15, 2015

16 pages

Published in:

Phys.Rev.D 92 (2015) 5, 052001

Published: Sep 8, 2015

e-Print:

1505.04051 [hep-ex]

DOI:

10.1103/PhysRevD.92.052001

Report number:

LHCB-PAPER-2015-021,
CERN-PH-EP-2015-118

Experiments:

CERN-LHC-LHCb

View in:

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Abstract: (APS)

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-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, pT, larger than 20 GeV in the pseudorapidity range 2.0<η<4.5. The partons are reconstructed as jets with pT>20 GeV and 2.2<η<4.2. The sum of the muon and jet momenta must satisfy pT>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.

14.70.Fm
13.87.-a
p p: colliding beams
jet: production
W: associated production
charm: hadroproduction
bottom: hadroproduction
forward production
W: leptonic decay
muon: transverse momentum

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Figures(29)

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