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Report number arXiv:1902.06794 ; CERN-EP-2019-016 ; LHCb-PAPER-2018-050 ; LHCB-PAPER-2018-050
Title Measurement of b-hadron fractions in 13 TeV pp collisions
Author(s) LHCb Collaboration  Mostrar todos os 847 autores
Publication 2019-08-29
Imprint 2019-02-18
Number of pages 11
Note 14 pages, 5 figures, see also https://lhcbproject.web.cern.ch/lhcbproject/Publications/LHCbProjectPublic/LHCb-PAPER-2018-050.html
In: Phys. Rev. D 100 (2019) 031102
DOI 10.1103/PhysRevD.100.031102
Subject category Particle Physics - Experiment ; hep-ph ; Particle Physics - Phenomenology ; hep-ex
Accelerator/Facility, Experiment CERN LHC ; LHCb
Free keywords flavor physics ; conservation law tests ; Heavy Flavour Production
Abstract The production fractions of B¯s0 and Λb0 hadrons, normalized to the sum of B and B¯0 fractions, are measured in 13 TeV pp collisions using data collected by the LHCb experiment, corresponding to an integrated luminosity of 1.67fb1. These ratios, averaged over the b-hadron transverse momenta from 4 to 25 GeV and pseudorapidity from 2 to 5, are 0.122±0.006 for B¯s0, and 0.259±0.018 for Λb0, where the uncertainties arise from both statistical and systematic sources. The Λb0 ratio depends strongly on transverse momentum, while the B¯s0 ratio shows a mild dependence. Neither ratio shows variations with pseudorapidity. The measurements are made using semileptonic decays to minimize theoretical uncertainties. In addition, the ratio of D+ to D0 mesons produced in the sum of B¯0 and B semileptonic decays is determined as 0.359±0.006±0.009, where the uncertainties are statistical and systematic.
Copyright/License preprint: © 2019-2024 CERN (License: CC-BY-4.0)
publication: © 2019-2024 CERN (License: CC-BY-4.0)



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 Record created 2019-02-19, last modified 2024-10-02


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