Search for Lepton-universality violation in B+ -> K(+)l(+)l(-) decays
File(s)
Published version
OA Location
Author(s)
Type
Journal Article
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+0.060−0.054+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.
Date Issued
2019-05-17
Date Acceptance
2019-05-01
Citation
Physical Review Letters, 2019, 122 (19), pp.191801-1-191801-13
ISSN
0031-9007
Publisher
American Physical Society
Start Page
191801-1
End Page
191801-13
Journal / Book Title
Physical Review Letters
Volume
122
Issue
19
Copyright Statement
© 2019 CERN, for the LHCb Collaboration. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.
Sponsor
Science and Technology Facilities Council (STFC)
Identifier
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000468227800003&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
Grant Number
ST/N000242/1
Subjects
Science & Technology
Physical Sciences
Physics, Multidisciplinary
Physics
Publication Status
Published
Article Number
ARTN 191801
Date Publish Online
2019-05-13