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

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

Bibliographic Details
Parent link:	Physical Review Letters Vol. 122, iss. 19.— 2019.— [191801, 13 p.]
Corporate Authors:	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
Other Authors:	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
Summary:	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.
Published:	2019
Subjects:	электронный ресурс труды учёных ТПУ
Online Access:	http://earchive.tpu.ru/handle/11683/64783 https://doi.org/10.1103/PhysRevLett.122.191801
Format:	Electronic Book Chapter
KOHA link:	https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=663342

Internet

http://earchive.tpu.ru/handle/11683/64783
https://doi.org/10.1103/PhysRevLett.122.191801