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

The LHCb Collaboration

Research output: Contribution to journalArticlepeer-review

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 Bs0→J/ψφ and Bs0→Ds-π+ 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.

Original languageEnglish
Article number032007
JournalPhysical Review D
Volume104
Issue number3
DOIs
Publication statusPublished - 1 Aug 2021

OECD FOS+WOS

  • 1.03 PHYSICAL SCIENCES AND ASTRONOMY
  • 1.03.BU ASTRONOMY & ASTROPHYSICS

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