Please use this identifier to cite or link to this item:
http://hdl.handle.net/2445/162289
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) Hadrons 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: https://doi.org/10.1103/PhysRevD.100.031102 |
It is part of: | Physical Review D, 2019, num. 100, p. 031102(R) |
URI: | http://hdl.handle.net/2445/162289 |
Related resource: | https://doi.org/10.1103/PhysRevD.100.031102 |
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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