Observation of Two Excited B+c States and Measurement of the B+c(2S) Mass in pp Collisions at √s=13  TeV; Physical Review Letters; Vol. 122, iss. 13

Observation of Two Excited B+c States and Measurement of the B+c(2S) Mass in pp Collisions at √s=13  TeV; Physical Review Letters; Vol. 122, iss. 13

Бібліографічні деталі
Parent link:Physical Review Letters
Vol. 122, iss. 13.— 2019.— [132001, 17 p.]
Співавтор: Национальный исследовательский Томский политехнический университет Исследовательская школа физики высокоэнергетических процессов
Інші автори: Sirunyan A. M., Tumasyan A. R., Adam W. Wolfgang, Ambrogi F. Federico, Bergauer T. Thomas, Babaev A. A. Anton Anatoljevich, Yuzhakov A. D. Aleksandr Dmitrievich, Okhotnikov V. V. Vitaly Vladimirovich
Резюме:Title screen
Signals consistent with the B+c(2S) and B*+c(2S) states are observed in proton-proton collisions at √s=13  TeV, in an event sample corresponding to an integrated luminosity of 143  fb−1, collected by the CMS experiment during the 2015-2018 LHC running periods. These excited ¯bc states are observed in the B+cπ+π− invariant mass spectrum, with the ground state B+c reconstructed through its decay to J/ψπ+. The two states are reconstructed as two well-resolved peaks, separated in mass by 29.1±1.5(stat)±0.7(syst)  MeV. The observation of two peaks, rather than one, is established with a significance exceeding five standard deviations. The mass of the B+c(2S) meson is measured to be 6871.0±1.2(stat)±0.8(syst)±0.8(B+c)  MeV, where the last term corresponds to the uncertainty in the world-average B+c mass.
Режим доступа: по договору с организацией-держателем ресурса
Мова:Англійська
Опубліковано: 2019
Предмети:
электронный ресурс
труды учёных ТПУ
Онлайн доступ:https://doi.org/10.1103/PhysRevLett.122.132001
Формат: Електронний ресурс Частина з книги
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=663685

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