Measurement of b hadron fractions in 13 TeV pp collisions; Physical Review D; Vol. 100, iss. 3
| Parent link: | Physical Review D: particles, fields, gravitation, and cosmology Vol. 100, iss. 3.— 2019.— [031102, 11 p.] |
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| Autores Corporativos: | , |
| Otros Autores: | , , , , , , |
| Sumario: | Title screen The production fractions of ¯B0s and Λ0b hadrons, normalized to the sum of B− and ¯B0 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 ¯B0s, and 0.259±0.018 for Λ0b, where the uncertainties arise from both statistical and systematic sources. The Λ0b ratio depends strongly on transverse momentum, while the ¯B0s 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 ¯B0 and B− semileptonic decays is determined as 0.359±0.006±0.009, where the uncertainties are statistical and systematic. |
| Lenguaje: | inglés |
| Publicado: |
2019
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| Materias: | |
| Acceso en línea: | http://earchive.tpu.ru/handle/11683/64807 https://doi.org/10.1103/PhysRevD.100.031102 |
| Formato: | Electrónico Capítulo de libro |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=663437 |