Search for the lepton flavour violating decay B+ → K+μ−τ+ using B∗0s2 decays

C. J. G. Onderwater, LHCb Collaboration

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Abstract

A search is presented for the lepton flavour violating decay B+ → K+μτ+ using a sample of proton-proton collisions at centre-of-mass energies of 7, 8, and 13 TeV, collected with the LHCb detector and corresponding to a total integrated luminosity of 9 fb−1. The τ leptons are selected inclusively, primarily via decays with a single charged particle. The four-momentum of the τ lepton is determined by using B+ mesons from Bs2∗0→B+K− decays. No significant excess is observed, and an upper limit is set on the branching fraction ℬ(B+ → K+μτ+) < 3.9 × 10−5 at 90 % confidence level. The obtained limit is comparable to the world-best limit. [Figure not available: see fulltext.].

Original languageEnglish
Article number129
Number of pages19
JournalJournal of High Energy Physics
Volume2020
Issue number6
DOIs
Publication statusPublished - 22-Jun-2020

Keywords

  • B physics
  • Beyond Standard Model
  • Flavor physics
  • Hadron-Hadron scattering (experiments)
  • Rare decay

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