A search for the lepton-flavor violating decays B+→K+μ±e-+ is performed using a sample of proton-proton collision data, collected with the LHCb experiment at center-of-mass energies of 7 and 8 TeV and corresponding to an integrated luminosity of 3 fb-1. No significant signal is observed, and upper limits on the branching fractions are set as B(B+→K+μ-e+)<7.0(9.5)×10-9 and B(B+→K+μ+e-)<6.4(8.8)×10-9 at 90% (95)% confidence level. The results improve the current best limits on these decays by more than one order of magnitude.

Aaij, R., Abellan Beteta, C., Ackernley, T., Adeva, B., Adinolfi, M., Aidala, C., et al. (2019). Search for Lepton-Flavor Violating Decays B+ →k+μ±e-+. PHYSICAL REVIEW LETTERS, 123(24) [10.1103/PhysRevLett.123.241802].

Search for Lepton-Flavor Violating Decays B+ →k+μ±e-+

Calvi M.;Carniti P.;Fazzini D.;Gotti C.;Martinazzoli L.;Martinelli M.;
2019

Abstract

A search for the lepton-flavor violating decays B+→K+μ±e-+ is performed using a sample of proton-proton collision data, collected with the LHCb experiment at center-of-mass energies of 7 and 8 TeV and corresponding to an integrated luminosity of 3 fb-1. No significant signal is observed, and upper limits on the branching fractions are set as B(B+→K+μ-e+)<7.0(9.5)×10-9 and B(B+→K+μ+e-)<6.4(8.8)×10-9 at 90% (95)% confidence level. The results improve the current best limits on these decays by more than one order of magnitude.
Articolo in rivista - Articolo scientifico
lhcb
English
Aaij, R., Abellan Beteta, C., Ackernley, T., Adeva, B., Adinolfi, M., Aidala, C., et al. (2019). Search for Lepton-Flavor Violating Decays B+ →k+μ±e-+. PHYSICAL REVIEW LETTERS, 123(24) [10.1103/PhysRevLett.123.241802].
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