Theoretical description of the decays Λb → ΛðÞð1 2 ; 3 2 Þ + J=ψ

Theoretical description of the decays Λb → ΛðÞð1 2 ; 3 2 Þ + J=ψ

Detalles Bibliográficos
Parent link:Physical Review D: particles, fields, gravitation, and cosmology.— , 1970-
Vol. 96, iss. 1.— 2017.— [013003, 11 p.]
Autor Corporativo: Национальный исследовательский Томский политехнический университет Исследовательская школа физики высокоэнергетических процессов
Otros Autores: Gutsche T. Thomas, Ivanov M. A. Mikhail Alekseevich, Korner J. G. Juergen, Lyubovitskiy (Lyubovitskij) V. E. Valery Efimovich, Lyubushkin V. V. Vladimir, Santorelli P. Pietro
Sumario:Title screen
We calculate the invariant and helicity amplitudes for the transitions Λb → ΛðÞðJPÞ þ J=ψ, where the ΛðÞðJPÞ are ΛðsudÞ-type ground and excited states with JP quantum numbers JP ¼ 1 2 , 3 2 . The calculations are performed in the framework of a covariant confined quark model previously developed by us. We find that the values of the helicity amplitudes for the Λð1520; 3 2 −Þ and the Λð1890; 3 2 þÞ are suppressed compared with those for the ground state Λð1116; 1 2 þÞ and the excited state Λð1405; 1 2 −Þ. This analysis is important for the identification of the hidden charm pentaquark states Pþ c ð4380Þ and Pþ c ð4450Þ which were discovered in the decay chain Λ0 b → Pþ c ð→ pJ=ψÞ þ K− because the cascade decay chain Λb → Λð3 2 Þð→ pK−Þ þ J=ψ involves the same final state.
Режим доступа: по договору с организацией-держателем ресурса
Lenguaje:inglés
Publicado: 2017
Materias:
электронный ресурс
труды учёных ТПУ
спиральность
переходы
кварки
возбужденные состояния
Acceso en línea:https://doi.org/10.1103/PhysRevD.96.013003
Formato: Electrónico Capítulo de libro
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=666961

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