Observation of the B0s→X(3872)ϕ Decay; Physical Review Letters; Vol. 125, iss. 15

Observation of the B0s→X(3872)ϕ Decay; Physical Review Letters; Vol. 125, iss. 15

Detalles Bibliográficos
Parent link:Physical Review Letters
Vol. 125, iss. 15.— 2020.— [152001, 18 p.]
Autor Corporativo: Национальный исследовательский Томский политехнический университет Исследовательская школа физики высокоэнергетических процессов
Otros Autores: Sirunyan A. M., Tumasyan A. R., Adam W. Wolfgang, Ambrogi F. Federico, Bergauer T. Thomas, Tyurin N. E. Nikolay Evgenjevich, Babaev A. A. Anton Anatoljevich, Okhotnikov V. V. Vitaly Vladimirovich, Sukhikh L. G. Leonid Grigorievich
Sumario:Title screen
Using a data sample of proton-proton collisions at √s=13  TeV, corresponding to an integrated luminosity of 140  fb−1 collected by the CMS experiment in 2016-2018, the B0s→X(3872)ϕ decay is observed. Decays into J/ψπ+π− and K+K− are used to reconstruct, respectively, the X(3872) and ϕ. The ratio of the product of branching fractions B[B0s→X(3872)ϕ]B[X(3872)→J/ψπ+π−] to the product B[B0s→ψ(2S)ϕ]B[ψ(2S)→J/ψπ+π−] is measured to be [2.21±0.29(stat)±0.17(syst)]%. The ratio B[B0s→X(3872)ϕ]/B[B0→X(3872)K0] is found to be consistent with one, while the ratio B[B0s→X(3872)ϕ]/B[B+→X(3872)K+] is two times smaller. This suggests a difference in the production dynamics of the X(3872) in B0 and B0s meson decays compared to B+. The reported observation may shed new light on the nature of the X(3872) particle.
Режим доступа: по договору с организацией-держателем ресурса
Lenguaje:inglés
Publicado: 2020
Materias:
электронный ресурс
труды учёных ТПУ
Acceso en línea:https://doi.org/10.1103/PhysRevLett.125.152001
Formato: MixedMaterials Electrónico Capítulo de libro
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=663155

Internet

https://doi.org/10.1103/PhysRevLett.125.152001

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