Measurement of Bc(2S)+ and B∗c(2S)+ cross section ratios in proton-proton collisions at √s=13 TeV; Physical Review D; Vol. 102, iss. 9

Measurement of Bc(2S)+ and B∗c(2S)+ cross section ratios in proton-proton collisions at √s=13 TeV; Physical Review D; Vol. 102, iss. 9

Chi tiết về thư mục
Parent link:	Physical Review D: particles, fields, gravitation, and cosmology.— , 1970- Vol. 102, iss. 9.— 2020.— [092007, 21 p.]
Tác giả của công ty:	Национальный исследовательский Томский политехнический университет Исследовательская школа физики высокоэнергетических процессов
Tác giả khác:	Sirunyan A. M., Tumasyan A. R., Adam W. Wolfgang, Ambrogi F. Federico, Tyurin N. E. Nikolay Evgenjevich, Babaev A. A. Anton Anatoljevich, Sukhikh L. G. Leonid Grigorievich
Tóm tắt:	Title screen The ratios of the Bc(2S)+ to B+c, B∗c(2S)+ to B+c, and B∗c(2S)+ to Bc(2S)+ production cross sections are measured in proton-proton collisions at √s=13 TeV, using a data sample collected by the CMS experiment at the LHC, corresponding to an integrated luminosity of 143 fb−1. The three measurements are made in the B+c meson phase space region defined by the transverse momentum pT>15 GeV and absolute rapidity \|y\|<2.4, with the excited B()c(2S)+ states reconstructed through the B()+cπ+π−, followed by the B+c→J/ψπ+ and J/ψ→μ+μ− decays. The Bc(2S)+ to B+c, B∗c(2S)+ to B+c, and B∗c(2S)+ to Bc(2S)+ cross section ratios, including the unknown B()c(2S)+→B()+cπ+π− branching fractions, are (3.47±0.63(stat)±0.33(syst))%, (4.69±0.71(stat)±0.56(syst))%, and 1.35±0.32(stat)±0.09(syst), respectively. None of these ratios shows a significant dependence on the pT or \|y\| of the B+c meson. The normalized dipion invariant mass distributions from the decays B()c(2S)+→B()+cπ+π− are also reported.
Ngôn ngữ:	Tiếng Anh
Được phát hành:	2020
Những chủ đề:	электронный ресурс труды учёных ТПУ
Truy cập trực tuyến:	http://earchive.tpu.ru/handle/11683/72767 https://doi.org/10.1103/PhysRevD.102.092007
Định dạng:	Điện tử Chương của sách
KOHA link:	https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=666168

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