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

ग्रंथसूची विवरण
Parent link:Physical Review Letters
Vol. 125, iss. 15.— 2020.— [152001, 18 p.]
निगमित लेखक: Национальный исследовательский Томский политехнический университет Исследовательская школа физики высокоэнергетических процессов
अन्य लेखक: 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
सारांश: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
भाषा:अंग्रेज़ी
प्रकाशित: 2020
विषय:
электронный ресурс
труды учёных ТПУ
ऑनलाइन पहुंच:https://doi.org/10.1103/PhysRevLett.125.152001
स्वरूप: इलेक्ट्रोनिक पुस्तक अध्याय
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=663155
विवरण
सारांश: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
डिजिटल ऑब्जेक्ट पहचानकर्ता:10.1103/PhysRevLett.125.152001

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