Search for Lepton-Universality Violation in B+→K+ℓ+ℓ− Decays; Physical Review Letters; Vol. 122, iss. 19

Search for Lepton-Universality Violation in B+→K+ℓ+ℓ− Decays; Physical Review Letters; Vol. 122, iss. 19

Detalhes bibliográficos
Parent link:Physical Review Letters
Vol. 122, iss. 19.— 2019.— [191801, 13 p.]
Autores corporativos: Национальный исследовательский Томский политехнический университет Инженерная школа информационных технологий и робототехники, Национальный исследовательский Томский политехнический университет Исследовательская школа физики высокоэнергетических процессов
Outros Autores: Aaij R. Roel, Beteta C. A. Carlos Abellan, Adeva B. Bernardo, Shapkin M. M. Mikhail Mikhaylovich, Kharisova A. E. Anastasiya Evgenjevna, Panshin G. L. Gennady Leonidovich, Strokov S. A. Sergey Aleksandrovich
Resumo:Title screen
A measurement of the ratio of branching fractions of the decays B+→K+μ+μ− and B+→K+e+e− is presented. The proton-proton collision data used correspond to an integrated luminosity of 5.0  fb−1 recorded with the LHCb experiment at center-of-mass energies of 7, 8, and 13 TeV. For the dilepton mass-squared range 1.1<q2<6.0  GeV2/c4 the ratio of branching fractions is measured to be RK=0.846+0.060−0.054+0.016−0.014, where the first uncertainty is statistical and the second systematic. This is the most precise measurement of RK to date and is compatible with the standard model at the level of 2.5 standard deviations.
Idioma:inglês
Publicado em: 2019
Assuntos:
электронный ресурс
труды учёных ТПУ
Acesso em linha:http://earchive.tpu.ru/handle/11683/64783
https://doi.org/10.1103/PhysRevLett.122.191801
Formato: Recurso Eletrônico Capítulo de Livro
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=663342

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