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Measurement of the b-Quark Production Cross Section in 7 and 13 TeV pp Collisions

R. Aaij et al. (LHCb Collaboration)
Phys. Rev. Lett. 118, 052002 – Published 3 February 2017; Erratum Phys. Rev. Lett. 119, 169901 (2017)
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Abstract

Measurements of the cross section for producing b quarks in the reaction ppbb¯X are reported in 7 and 13 TeV collisions at the LHC as a function of the pseudorapidity η in the range 2<η<5 covered by the acceptance of the LHCb experiment. The measurements are done using semileptonic decays of b-flavored hadrons decaying into a ground-state charmed hadron in association with a muon. The cross sections in the covered η range are 72.0±0.3±6.8 and 154.3±1.5±14.3μb for 7 and 13 TeV. The ratio is 2.14±0.02±0.13, where the quoted uncertainties are statistical and systematic, respectively. The agreement with theoretical expectation is good at 7 TeV, but differs somewhat at 13 TeV. The measured ratio of cross sections is larger at lower η than the model prediction.

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  • Received 15 December 2016

DOI:https://doi.org/10.1103/PhysRevLett.118.052002

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.

© 2017 CERN, for the LHCb Collaboration

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Vol. 118, Iss. 5 — 3 February 2017

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