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Measurement of b hadron fractions in 13 TeV pp collisions

R. Aaij et al. (LHCb Collaboration)
Phys. Rev. D 100, 031102(R) – Published 27 August 2019
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Abstract

The production fractions of B¯s0 and Λb0 hadrons, normalized to the sum of B and B¯0 fractions, are measured in 13 TeV pp collisions using data collected by the LHCb experiment, corresponding to an integrated luminosity of 1.67fb1. These ratios, averaged over the b hadron transverse momenta from 4 to 25 GeV and pseudorapidity from 2 to 5, are 0.122±0.006 for B¯s0, and 0.259±0.018 for Λb0, where the uncertainties arise from both statistical and systematic sources. The Λb0 ratio depends strongly on transverse momentum, while the B¯s0 ratio shows a mild dependence. Neither ratio shows variations with pseudorapidity. The measurements are made using semileptonic decays to minimize theoretical uncertainties. In addition, the ratio of D+ to D0 mesons produced in the sum of B¯0 and B semileptonic decays is determined as 0.359±0.006±0.009, where the uncertainties are statistical and systematic.

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  • Received 18 February 2019

DOI:https://doi.org/10.1103/PhysRevD.100.031102

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. Funded by SCOAP3.

© 2019 CERN, for the LHCb Collaboration

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Vol. 100, Iss. 3 — 1 August 2019

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