Observation of the B0s→X(3872)ϕ Decay

Observation of the B0s→X(3872)ϕ Decay

Manylion Llyfryddiaeth
Parent link:	Physical Review Letters Vol. 125, iss. 15.— 2020.— [152001, 18 p.]
Awdur Corfforaethol:	Национальный исследовательский Томский политехнический университет Исследовательская школа физики высокоэнергетических процессов
Awduron Eraill:	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
Crynodeb:	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
Iaith:	Saesneg
Cyhoeddwyd:	2020
Pynciau:	электронный ресурс труды учёных ТПУ
Mynediad Ar-lein:	https://doi.org/10.1103/PhysRevLett.125.152001
Fformat:	Electronig Pennod Llyfr
KOHA link:	https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=663155

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