New analysis of ηπ tensor resonances measured at the COMPASS experiment; Physics Letters B; Vol. 779

New analysis of ηπ tensor resonances measured at the COMPASS experiment; Physics Letters B; Vol. 779

Dettagli Bibliografici
Parent link:	Physics Letters B Vol. 779.— 2018.— P. 464-472
Altri autori:	Jackura A. Andrew, Fernandez-Ramirez C. Cesar, Fox G. Ch. Geoffrey Charles, Dusaev R. R. Renat Ramilyevich, Levchenko E. A. Evgeny Anatolievich, Mamon S. A. Sergey Aleksandrovich, Vasilishin B. I. Bogdan Ivanovich, Burtsev V. E. Vitaly Evgenjevich, Chumakov A. G. Aleksandr Grigorjevich, Lyubovitskiy (Lyubovitskij) V. E. Valery Efimovich
Riassunto:	Title screen We present a new amplitude analysis of the ηπ D-wave in the reaction π−p→ηπ−p measured by COMPASS. Employing an analytical model based on the principles of the relativistic S-matrix, we find two resonances that can be identified with the a2(1320) and the excited a2′(1700), and perform a comprehensive analysis of their pole positions. For the mass and width of the a2 we find M=(1307±1±6) MeV and Γ=(112±1±8) MeV, and for the excited state a2′ we obtain M=(1720±10±60) MeV and Γ=(280±10±70) MeV, respectively.
Lingua:	inglese
Pubblicazione:	2018
Soggetti:	электронный ресурс труды учёных ТПУ резонансы COMPASS волны тензоры
Accesso online:	https://doi.org/10.1016/j.physletb.2018.01.017
Natura:	Elettronico Capitolo di libro
KOHA link:	https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=666925

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