Search for Lepton-Universality Violation in B+ →k++-Decays

LHCb Collaboration, Alexander Rudolfovich Wagner

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

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=0.846-0.054+0.060-0.014+0.016, 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.

Original languageEnglish
Article number191801
JournalPhysical Review Letters
Volume122
Issue number19
DOIs
Publication statusPublished - 13 May 2019

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leptons
protons
decay
center of mass
standard deviation
luminosity
collisions
energy

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Search for Lepton-Universality Violation in B+ →k++-Decays. / LHCb Collaboration ; Wagner, Alexander Rudolfovich.

In: Physical Review Letters, Vol. 122, No. 19, 191801, 13.05.2019.

Research output: Contribution to journalArticle

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