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

Authors: Aaij, R.; Beteta, C. Abellan; Ackernley, T.; Adeva, B.; Adinolfi, M.; Afsharnia, H.; Aidala, C. A.; +193 Authors

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

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 $B^0_s \to J/����$ and $B^0_s \to D^-_s ��^+$ 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.

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)

Countries
Italy, Italy, France, Netherlands, Italy, Switzerland, Italy, Italy, Italy, Netherlands, Germany, Russian Federation, Italy, Netherlands, Italy, Italy, Italy, Germany, Italy, Italy, Russian Federation, Germany, Sweden, Italy, Italy, Italy
Keywords

J/psi(3100), Settore PHYS-01/A - Fisica sperimentale delle interazioni fondamentali e applicazioni, B/s0 --> D/s- pi+, transverse momentum dependence, High Energy Physics - Experiment, Subatomär fysik, Physics; HEP; LHC; LHCb; Particles and fields; Branching fraction; Fragmentation into hadrons; Hadron-Hadron scattering (experiments); Hadron colliders;, S051.2, S051.3, High Energy Physics - Experiment (hep-ex), (B)OVER-BAR(S)(0), Subatomic Physics, scattering [p p], [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], 1st observation, info:eu-repo/classification/ddc/530, (B) OVER-BAR(S)(0), new physics: search for, Charm physics, Hadron-Hadron scattering (experiments), QCD, Spectroscopy, branching ratio [B/s0], 1st observation; b-quark; b-0(b); over-bar(s)(0); heavy, Settore FIS/01 - FISICA SPERIMENTALE, LHC, Flavour Physics, hadronic decay [B/s0], CERN LHC Coll, B/s0: transverse momentum, colliding beams [p p], HEAVY, 1ST OBSERVATION, B/s0: branching ratio, D/s-, p p: scattering, [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], statistics: Tsallis, FOS: Physical sciences, heavy, 612, fragmentation function: ratio, B/s0 --> J/psi(3100) Phi(1020), (b)over-bar(s)(0), B/s0 --> D/s- pi+, 530, b-quark, energy dependence, search for [new physics], B-0, SDG 7 - Affordable and Clean Energy, Phi(1020), Tsallis [statistics], 500, ratio [fragmentation function], 541, LHC-B, 620, B/s0 --> J/psi(3100) Phi(1020), LHCb, S086.5, S086.7, B-QUARK, B/s0: hadronic decay, transverse momentum [B/s0], b-0, p p: colliding beams, experimental results

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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
36
Top 1%
Top 10%
Top 1%
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