Abstract
A measurement is reported of the ratio of branching fractions , where the lepton is identified in the decay mode . This analysis uses a sample of proton-proton collision data corresponding to of integrated luminosity recorded with the LHCb experiment at center-of-mass energies of 7 and 8 TeV. A signal is found for the decay at a significance of 3 standard deviations corrected for systematic uncertainty, and the ratio of the branching fractions is measured to be . This result lies within 2 standard deviations above the range of central values currently predicted by the standard model.
- Received 16 November 2017
- Revised 19 January 2018
- Corrected 4 April 2018
DOI:https://doi.org/10.1103/PhysRevLett.120.121801
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.
© 2018 CERN, for the LHCb Collaboration
Physics Subject Headings (PhySH)
Corrections
4 April 2018
Correction: The copyright statement contained an error and has been corrected.