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Title

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

AuthorsLHCb Collaboration; García Martín, L.M.; Henry, L.; Jashal, B.; Martínez-Vidal, Fernando ; Oyanguren, Arantza ; Remón Alepuz, Clara; Ruiz Vidal, Joan; Sánchez Mayordomo, Carlos
Issue DateDec-2019
PublisherAmerican Physical Society
CitationPhysical Review Letters 123 (24): 241802 (2019)
AbstractA search for the lepton-flavor violating decays B+→K+μ±eâ> 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.
Publisher version (URL)http://dx.doi.org/10.1103/PhysRevLett.123.241802
URIhttp://hdl.handle.net/10261/208149
Identifiersdoi: 10.1103/PhysRevLett.123.241802
issn: 1079-7114
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