Precise measurement of the <i>f</i><sub>s</sub>/<i>f<sub>d</sub></i> ratio of fragmentation fractions and of <i>B<sub>s</sub></i><SUP>0</SUP> decay branching fractions



Aaij, R, Beteta, C Abellan, Ackernley, T, Adeva, B, Adinolfi, M, Afsharnia, H, Aidala, CA, Aiola, S, Ajaltouni, Z, Akar, S
et al (show 955 more authors) (2021) Precise measurement of the <i>f</i><sub>s</sub>/<i>f<sub>d</sub></i> ratio of fragmentation fractions and of <i>B<sub>s</sub></i><SUP>0</SUP> decay branching fractions. PHYSICAL REVIEW D, 104 (3). 032005-.

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Abstract

The ratio of the $B^0_s$ and $B^0$ fragmentation fractions, $f_s/f_d$, in proton-proton collisions at the LHC, is obtained as a function of $B$-meson transverse momentum and collision centre-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 $B^0_s \to J/\psi \phi$ and $B^0_s \to D^-_s \pi^+$ decays are performed, reducing their uncertainty by about a factor of two with respect to previous world averages. Numerous $B^0_s$ decay branching fractions, measured at the LHCb experiment, are also updated using the new values of $f_s/f_d$ and branching fractions of normalisation channels. These results reduce a major source of systematic uncertainty in several searches for new physics performed through measurements of $B^0_s$ branching fractions.

Item Type: Article
Additional Information: All figures and tables, along with any supplementary material and additional information, are available at https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2020-046.html (LHCb public pages)
Uncontrolled Keywords: hep-ex, hep-ex
Divisions: Faculty of Science and Engineering > School of Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 02 Sep 2021 08:54
Last Modified: 10 Oct 2023 09:16
DOI: 10.1103/PhysRevD.104.032005
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3134986