Observation of a Narrow Pentaquark State, Pc(4312)+, and of the Two-Peak Structure of the Pc(4450)+

Observation of a Narrow Pentaquark State, Pc(4312)+, and of the Two-Peak Structure of the Pc(4450)+

Bibliographic Details
Parent link:Physical Review Letters
Vol. 122, iss. 22.— 2019.— [222001, 11 p.]
Corporate Authors: Национальный исследовательский Томский политехнический университет Инженерная школа информационных технологий и робототехники Отделение автоматизации и робототехники (ОАР), Национальный исследовательский Томский политехнический университет Исследовательская школа физики высокоэнергетических процессов
Other Authors: Aaij R. Roel, Beteta C. A. Carlos Abellan, Adeva B. Bernardo, Eydelman S. I. Semen Isaakovich, Kharisova A. E. Anastasiya Evgenjevna, Panshin G. L. Gennady Leonidovich, Strokov S. A. Sergey Aleksandrovich
Summary:Title screen
A narrow pentaquark state, Pc(4312)+, decaying to J/ψp, is discovered with a statistical significance of 7.3σ in a data sample of Λ0b→J/ψpK− decays, which is an order of magnitude larger than that previously analyzed by the LHCb Collaboration. The Pc(4450)+ pentaquark structure formerly reported by LHCb is confirmed and observed to consist of two narrow overlapping peaks, Pc(4440)+ and Pc(4457)+, where the statistical significance of this two-peak interpretation is 5.4σ. The proximity of the Σ+c¯D0 and Σ+c¯D*0 thresholds to the observed narrow peaks suggests that they play an important role in the dynamics of these states.
Published: 2019
Subjects:
электронный ресурс
труды учёных ТПУ
Online Access:https://doi.org/10.1103/PhysRevLett.122.222001
Format: Electronic Book Chapter
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=663344

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