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Title: Measurement of b hadron fractions in 13 TeV pp collisions
Author: LHCb Collaboration
Alfonso Albero, Alejandro
Calvo Gómez, Míriam
Camboni, Alessandro
Coquereau, Samuel
Garrido Beltrán, Lluís
Gascón Fora, David
Gironella Gironell, Pere
Graciani Díaz, Ricardo
Graugés Pous, Eugeni
Vilasis-Cardona, Xavier
Marin Benito, Carla
Keywords: Hadrons
Col·lisions (Física nuclear)
Collisions (Nuclear physics)
Issue Date: 27-Aug-2019
Publisher: American Physical Society
Abstract: The production fractions of B¯ 0s and Λ0b 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 1.67 fb−1. 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¯ 0s, and 0.259 0.018 for Λ0 b, where the uncertainties arise from both statistical and systematic sources. The Λ0b ratio depends strongly on transverse momentum, while the B¯ 0 s 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 Dþ 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
Note: Reproducció del document publicat a:
It is part of: Physical Review D, 2019, num. 100, p. 031102(R)
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ISSN: 1550-7998
Appears in Collections:Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB))
Articles publicats en revistes (Física Quàntica i Astrofísica)

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