• Open Access

Precise measurement of the fs/fd ratio of fragmentation fractions and of Bs0 decay branching fractions

R. Aaij et al. (LHCb Collaboration)
Phys. Rev. D 104, 032005 – Published 20 August 2021
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Abstract

The ratio of the Bs0 and B0 fragmentation fractions, fs/fd, in proton-proton collisions at the LHC, is obtained as a function of B-meson transverse momentum and collision center-of-mass energy from the combined analysis of different B-decay channels measured by the LHCb experiment. The results are described by a linear function of the meson transverse momentum or with a function inspired by Tsallis statistics. Precise measurements of the branching fractions of the Bs0J/ψϕ and Bs0Dsπ+ decays are performed, reducing their uncertainty by about a factor of 2 with respect to previous world averages. Numerous Bs0 decay branching fractions, measured at the LHCb experiment, are also updated using the new values of fs/fd and branching fractions of normalization channels. These results reduce a major source of systematic uncertainty in several searches for new physics performed through measurements of Bs0 branching fractions.

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  • Received 11 March 2021
  • Accepted 12 July 2021

DOI:https://doi.org/10.1103/PhysRevD.104.032005

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.

© 2021 CERN, for the LHCb Collaboration

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Vol. 104, Iss. 3 — 1 August 2021

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