PT Journal
AU LHCb Collaboration (Aaij, Rea
   Garcia Martin, LM
   Henry, L
   Jashal, BK
   Martinez-Vidal, F
   Oyanguren, A
   Remon Alepuz, C
   Ruiz Vidal, J
   Sanchez Mayordomo, C
TI Search for the lepton flavour violating decay B+ -> K+mu(-)tau(+) using Bs20 decays
SO Journal of High Energy Physics
JI J. High Energy Phys.
PY 2020
BP 129
EP 19pp
VL 06
IS 6
DI 10.1007/JHEP06(2020)129
LA English
DE B physics; Beyond Standard Model; Flavor physics; Hadron-Hadron scattering (experiments); Rare decay
AB A search is presented for the lepton flavour violating decay B+ -> K+mu (-)tau (+) 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 tau leptons are selected inclusively, primarily via decays with a single charged particle. The four-momentum of the tau lepton is determined by using B+ mesons from Bs20 -> B+K- decays. No significant excess is observed, and an upper limit is set on the branching fractionB(B+-> K+mu (-)tau (+))<3.9x10(-5)at90%confidence level.The obtained limit is comparable to the world-best limit.
ER