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Enhanced Production of \ensuremathŁambdab0 Baryons in High-Multiplicity pp Collisions at s=13\,\,TeVстатья
Статья опубликована в высокорейтинговом журнале
Статья опубликована в журнале из списка Web of Science и/или Scopus- Авторы: Бережной А.В., Горелов И.В., Данилина А.В., Козачук А.Д., Лефлат А.К., Никитин Н.В., Саврина Д.В., Соломин А.Н., Жуков В.Ю., Королев М.Г., LHCb Collaboration
- Журнал: Physical Review Letters
- Том: 132
- Номер: 8
- Год издания: 2024
- Издательство: American Physical Society
- Местоположение издательства: United States
- Первая страница: 081901
- DOI: 10.1103/PhysRevLett.132.081901
- Аннотация: The production rate of Λb0 baryons relative to B0 mesons in pp collisions at a center-of-mass energy \sqrt{s}=13 TeV is measured by the LHCb experiment. The ratio of Λb0 to B0 production cross sections shows a significant dependence on both the transverse momentum and the measured charged-particle multiplicity. At low multiplicity, the ratio measured at LHCb is consistent with the value measured in e+e- collisions, and increases by a factor of ∼2 with increasing multiplicity. At relatively low transverse momentum, the ratio of Λb0 to B0 cross sections is higher than what is measured in e+e- collisions, but converges with the e+e- ratio as the momentum increases. These results imply that the evolution of heavy b quarks into final-state hadrons is influenced by the density of the hadronic environment produced in the collision. Comparisons with several models and implications for the mechanisms enforcing quark confinement are discussed.
- Добавил в систему: Горелов Игорь Владимирович