Test of lepton universality in beauty-quark decays

Test of lepton universality in beauty-quark decays

Bibliografiske detaljer
Parent link:	Nature Physics Vol. 18, iss. 3.— 2022.— [P. 277-282]
Corporate Authors:	Национальный исследовательский Томский политехнический университет Инженерная школа информационных технологий и робототехники Отделение автоматизации и робототехники, Национальный исследовательский Томский политехнический университет Исследовательская школа физики высокоэнергетических процессов
Andre forfattere:	Aaij R. Roel, Beteta C. A. Carlos Abellan, Ackernley T., Panshin G. L. Gennady Leonidovich, Kharisova A. E. Anastasiya Evgenjevna, Vagner A. R. Aleksandr Rudolfovich
Summary:	Title screen The standard model of particle physics currently provides our best description of fundamental particles and their interactions. The theory predicts that the different charged leptons, the electron, muon and tau, have identical electroweak interaction strengths. Previous measurements have shown that a wide range of particle decays are consistent with this principle of lepton universality. This article presents evidence for the breaking of lepton universality in beauty-quark decays, with a significance of 3.1 standard deviations, based on proton–proton collision data collected with the LHCb detector at CERN’s Large Hadron Collider. The measurements are of processes in which a beauty meson transforms into a strange meson with the emission of either an electron and a positron, or a muon and an antimuon. If confirmed by future measurements, this violation of lepton universality would imply physics beyond the standard model, such as a new fundamental interaction between quarks and leptons.
Sprog:	engelsk
Udgivet:	2022
Fag:	электронный ресурс труды учёных ТПУ
Online adgang:	https://doi.org/10.1038/s41567-021-01478-8
Format:	Electronisk Book Chapter
KOHA link:	https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=669597

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