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Observation of B0s mesons and measurement of the B0s/B+ yield ratio in PbPb collisions at sqrt(s[NN]) = 5.02 TeVстатья
Статья опубликована в высокорейтинговом журнале
Статья опубликована в журнале из списка Web of Science и/или ScopusДата последнего поиска статьи во внешних источниках: 20 апреля 2022 г.
- Авторы: Belyaev A.V., Boos E., Ershov A.A., Gribushin A., Kaminskiy A., Katkov I., Kodolova O., Korotkikh V., Lokhtin I., Obraztsov S., Petrushanko S., Savrin V., Snigirev A., Vardanyan I., CMS Collaboration
- Журнал: Physics Letters B
- Том: 829
- Год издания: 2022
- Издательство: Elsevier BV
- Местоположение издательства: Netherlands
- Первая страница: 137062
- DOI: 10.1016/j.physletb.2022.137062
- Аннотация: The B0s 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 B0s → J/ψ(μ+μ−)ϕ(K+K−) and B+ → J/ψ(μ+μ−)K+. The B0s 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 B0s and B+ is measured and compared to theoretical models that include quark recombination effects.
- Добавил в систему: Лохтин Игорь Петрович