Observation of B0 s mesons and measurement of the B0 s /B+ yield ratio in PbPb collisions at √sNN = 5.02 TeV

Observation of B0 s mesons and measurement of the B0 s /B+ yield ratio in PbPb collisions at √sNN = 5.02 TeV

The B-s(0) and B+ production yields are measured in PbPb collisions at a center-of-mass energy per nucleon pair of 5.02 TeV. The data sample, collected with the CMS detector at the LHC, corresponds to an integrated luminosity of 1.7 nb(-1). The mesons are reconstructed in the exclusive decay channel...

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Bibliographic Details
Published in:Physics Letters B Vol. 829. P. 137062 (1-25)
Other Authors: Tumasyan, Armen, Adam, Wolfgang, Ambrogi, F., Borshch, Vladislav, Ivanchenko, Vladimir, Tcherniaev, Evgueni
Format: Article
Language:English
Subjects:
кварк-глюонная плазма
B-мезоны
адронизация
статьи в журналах
Online Access:http://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001001003
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245 1 0 |a Observation of B0 s mesons and measurement of the B0 s /B+ yield ratio in PbPb collisions at √sNN = 5.02 TeV  |c A. Tumasyan, W. Adam, F. Ambrogi [et al.] 
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520 3 |a The B-s(0) and B+ production yields are measured in PbPb collisions at a center-of-mass energy per nucleon pair of 5.02 TeV. The data sample, collected with the CMS detector at the LHC, corresponds to an integrated luminosity of 1.7 nb(-1). The mesons are reconstructed in the exclusive decay channels B-s(0) -> J/psi (mu(+)mu(-))phi(K+K-) and B+ -> J/psi(mu(+)mu(-))K+ in the transverse momentum range 7-50 GeV/c and absolute rapidity 0-2.4. The B-s(0) meson is observed with a statistical significance in excess of five standard deviations for the first time in nucleus-nucleus collisions. The measurements are performed as functions of the transverse momentum of the B mesons and of the PbPb collision centrality. The ratio of production yields of B-s(0) and B+ is measured and compared to theoretical models that include quark recombination effects. (C) 2022 The Author(s). Published by Elsevier B.V. 
653 |a кварк-глюонная плазма 
653 |a B-мезоны 
653 |a адронизация 
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700 1 |a Tumasyan, Armen 
700 1 |a Adam, Wolfgang 
700 1 |a Ambrogi, F. 
700 1 |a Borshch, Vladislav 
700 1 |a Ivanchenko, Vladimir 
700 1 |a Tcherniaev, Evgueni 
773 0 |t Physics Letters B  |d 2022  |g Vol. 829. P. 137062 (1-25)  |x 0370-2693 
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