Measurement of <i>b</i> hadron fractions in 13 TeV <i>pp</i> collisions



Aaij, R, Beteta, C Abellan, Adeva, B, Adinolfi, M, Aidala, CA, Ajaltouni, Z, Akar, S, Albicocco, P, Albrecht, J, Alessio, F
et al (show 837 more authors) (2019) Measurement of <i>b</i> hadron fractions in 13 TeV <i>pp</i> collisions. PHYSICAL REVIEW D, 100 (3). 031102-.

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Abstract

The production fractions of $\overline{B}_s^0$ and $\Lambda_b^0$ hadrons, normalized to the sum of $B^-$ and $\overline{B}^0$ fractions, are measured in 13 TeV pp collisions using data collected by the LHCb experiment, corresponding to an integrated luminosity of 1.67/fb. These ratios, averaged over the $b$-hadron transverse momenta from 4 to 25 GeV and pseudorapidity from 2 to 5, are $0.122 \pm 0.006$ for $\overline{B}_s^0$, and $0.259 \pm 0.018$ for $\Lambda_b^0$, where the uncertainties arise from both statistical and systematic sources. The $\Lambda_b^0$ ratio depends strongly on transverse momentum, while the $\overline{B}_s^0$ 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 $D^0$ mesons produced in the sum of $\overline{B}^0$ and $B^-$ semileptonic decays is determined as $0.359\pm0.006\pm 0.009$, where the uncertainties are statistical and systematic.

Item Type: Article
Additional Information: 14 pages, 5 figures, see also https://lhcbproject.web.cern.ch/lhcbproject/Publications/LHCbProjectPublic/LHCb-PAPER-2018-050.html
Uncontrolled Keywords: hep-ex, hep-ex, hep-ph
Depositing User: Symplectic Admin
Date Deposited: 16 Jan 2020 17:23
Last Modified: 14 Mar 2024 23:19
DOI: 10.1103/PhysRevD.100.031102
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3070889