Evidence for exotic hadron contributions to $Λ_b^0 \to J/ψ p π^-$ decaysстатья

Статья опубликована в высокорейтинговом журнале

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Дата последнего поиска статьи во внешних источниках: 26 сентября 2016 г.
• Авторы:
• Журнал: Physical Review Letters
• Том: 117
• Номер: 8
• Год издания: 2016
• Издательство: American Physical Society
• Местоположение издательства: United States
• Первая страница: 082003
• DOI: 10.1103/PhysRevLett.117.082003
• Аннотация: A full amplitude analysis of Λ0b→J/ψpπ− decays is performed with a data sample acquired with the LHCb detector from 7 and 8 TeV pp collisions, corresponding to an integrated luminosity of 3 fb−1. A significantly better description of the data is achieved when, in addition to the previously observed nucleon excitations N→pπ−, either the Pc(4380)+ and Pc(4450)+→J/ψp states, previously observed in Λ0b→J/ψpK− decays, or the Zc(4200)−→J/ψπ− state, previously reported in B0→J/ψK+π− decays, or all three, are included in the amplitude models. The data support a model containing all three exotic states, with a significance of more than three standard deviations. Within uncertainties, the data are consistent with the Pc(4380)+ and Pc(4450)+ production rates expected from their previous observation taking account of Cabibbo suppression.
• Добавил в систему: Бережной Александр Викторович

Работа с статьей

 [1] Evidence for exotic hadron contributions to Λ_b0 →j/ψ p π- decays / А. В. Бережной, И. В. Горелов, Н. В. Никитин et al. // Physical Review Letters. — 2016. — Vol. 117, no. 8. — P. 082003. A full amplitude analysis of Λ0b→J/ψpπ− decays is performed with a data sample acquired with the LHCb detector from 7 and 8 TeV pp collisions, corresponding to an integrated luminosity of 3 fb−1. A significantly better description of the data is achieved when, in addition to the previously observed nucleon excitations N→pπ−, either the Pc(4380)+ and Pc(4450)+→J/ψp states, previously observed in Λ0b→J/ψpK− decays, or the Zc(4200)−→J/ψπ− state, previously reported in B0→J/ψK+π− decays, or all three, are included in the amplitude models. The data support a model containing all three exotic states, with a significance of more than three standard deviations. Within uncertainties, the data are consistent with the Pc(4380)+ and Pc(4450)+ production rates expected from their previous observation taking account of Cabibbo suppression. [ DOI ]