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

Research output: Contribution to journalArticle

Authors

  • LHCb Collaboration

Colleges, School and Institutes

External organisations

  • Nikhef National Institute for Subatomic Physics
  • Universität Zürich
  • University of Liverpool
  • Universidad de Santiago de Compostela
  • BRISTOL UNIVERSITY
  • Université Clermont Auvergne
  • University of Michigan, Ann Arbor.
  • Istituto Nazionale di Fisica Nucleare, Sezione di Milano
  • Los Alamos National Laboratory
  • Laboratori Nazionali dell'Infn di Frascati
  • Technische Universität Dortmund
  • European Organization for Nuclear Research (CERN)
  • University of Glasgow
  • Universitat Autònoma de Barcelona
  • Petersburg Nuclear Physics Institute (PNPI)
  • Imperial College London
  • Universidade Federal Do Rio de Janeiro (UFRJ)
  • Université Paris-Saclay
  • Sezione INFN di Firenze
  • Laboratory of Photonics and Interfaces, Department de Chimie, Ecole Polytechnique Federale de Lausanne, CH-1015 Lausanne, Switzerland. ahmad@mpip-mainz.mpg.de
  • Sezione INFN di Ferrara
  • Ruprecht-Karls-Universität Heidelberg
  • Institute for High Energy Physics (IHEP)
  • Syracuse University, Syracuse, New York 13244, USA
  • Yandex School of Data Analysis
  • CNRS/IN2P3
  • THE UNIVERSITY OF WARWICK
  • Laboratoire Leprince-Ringuet
  • Institute of Physics

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.].

Details

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

Keywords

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

ASJC Scopus subject areas