Search for Lepton-Universality Violation in B+→K+ℓ+ℓ− Decays

Search for Lepton-Universality Violation in B+→K+ℓ+ℓ− Decays

Бібліографічні деталі
Parent link:Physical Review Letters
Vol. 122, iss. 19.— 2019.— [191801, 13 p.]
Співавтори: Национальный исследовательский Томский политехнический университет Инженерная школа информационных технологий и робототехники Отделение автоматизации и робототехники (ОАР), Национальный исследовательский Томский политехнический университет Исследовательская школа физики высокоэнергетических процессов
Інші автори: 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
Резюме: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.
Мова:Англійська
Опубліковано: 2019
Предмети:
электронный ресурс
труды учёных ТПУ
Онлайн доступ:http://earchive.tpu.ru/handle/11683/64783
https://doi.org/10.1103/PhysRevLett.122.191801
Формат: Електронний ресурс Частина з книги
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=663342
Опис
Резюме: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.
DOI:10.1103/PhysRevLett.122.191801

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