Search for the lepton flavour violating decay B + → K + μ τ + using Bs2∗0 decays

The Lhcb Collaboration

Research output: Contribution to JournalArticleAcademicpeer-review

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
JournalJournal of High Energy Physics
Volume2020
Issue number6
DOIs
Publication statusPublished - 1 Jun 2020

Funding

This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited

FundersFunder number
Creative Commons Attribution License
Horizon 2020 Framework Programme792684

    Keywords

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

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