Abstract / Description of output
A search is presented for the lepton flavour violating decay B$^{+}$ → K$^{+}$μ$^{−}$τ$^{+}$ 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 $ {B}_{s2}^{\ast 0}\to {B}^{+}{K}^{-} $ decays. No significant excess is observed, and an upper limit is set on the branching fractionℬ(B$^{+}$ → K$^{+}$μ$^{−}$τ$^{+}$) < 3.9 × 10$^{−5}$ at 90 % confidence level.The obtained limit is comparable to the world-best limit.[graphic not available: see fulltext]
Original language | English |
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Article number | 129 |
Journal | Journal of High Energy Physics |
Volume | 2020 |
DOIs | |
Publication status | Published - 22 Jun 2020 |