Journal Article PUBDB-2022-00280

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Precise measurement of the $f_s/f_d$ ratio of fragmentation fractions and of $B^0_s$ decay branching fractions

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2021
Inst. Melville, NY

Physical review / D 104(3), 032005 () [10.1103/PhysRevD.104.032005]
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Report No.: CERN-EP-2021-027; LHCb-PAPER-2020-046; arXiv:2103.06810

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 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 $B_s$ $^0 → J/ψϕ$ and $B_s^0 → D-_s π^+$ decays are performed, reducing their uncertainty by about a factor of 2 with respect to previous world averages. Numerous $B_s^0$ decay branching fractions, measured at the LHCb experiment, are also updated using the new values of $f_s/f_d$ 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 $B_s^0$ branching fractions.

Keyword(s): p p: colliding beams ; B/s0: transverse momentum ; new physics: search for ; statistics: Tsallis ; p p: scattering ; B/s0: branching ratio ; B/s0: hadronic decay ; J/psi(3100) ; Phi(1020) ; D/s- ; fragmentation function: ratio ; energy dependence ; transverse momentum dependence ; LHC-B ; CERN LHC Coll ; experimental results ; B/s0 --> J/psi(3100) Phi(1020) ; B/s0 --> D/s- pi+

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Contributing Institute(s):
  1. Informationstechnologie (IT)
Research Program(s):
  1. 6G9 - IDAF (DESY) (POF4-6G9) (POF4-6G9)
Experiment(s):
  1. DESY: TIER-II

Appears in the scientific report 2021
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 Record created 2022-01-17, last modified 2025-07-24


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