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 Bs2*0 → B+ K− decays. No significant excess is observed, and an upper limit is set on the branching fraction B(B+ → K+ μ− τ+) < 3.9 × 10^−5 at 90% confidence level. The obtained limit is comparable to the world-best limit.

Aaij, R., Abellán Beteta, C., Ackernley, T., Adeva, B., Adinolfi, M., Afsharnia, H., et al. (2020). Search for the Lepton Flavour Violating Decay B+ → K+ μ− τ+ Using Bs2*0 Decays. JOURNAL OF HIGH ENERGY PHYSICS, 2020(6), 0-18 [10.1007/JHEP06(2020)129].

Search for the Lepton Flavour Violating Decay B+ → K+ μ− τ+ Using Bs2*0 Decays

Betti, F.;Capriotti, L.;Carbone, A.;Ferrari, F.;Galli, D.;Maccolini, S.;Manuzzi, D.;Patrignani, C.;Perazzini, S.;Pisani, F.;Zucchelli, S.
2020

Abstract

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 Bs2*0 → B+ K− decays. No significant excess is observed, and an upper limit is set on the branching fraction B(B+ → K+ μ− τ+) < 3.9 × 10^−5 at 90% confidence level. The obtained limit is comparable to the world-best limit.
2020
Aaij, R., Abellán Beteta, C., Ackernley, T., Adeva, B., Adinolfi, M., Afsharnia, H., et al. (2020). Search for the Lepton Flavour Violating Decay B+ → K+ μ− τ+ Using Bs2*0 Decays. JOURNAL OF HIGH ENERGY PHYSICS, 2020(6), 0-18 [10.1007/JHEP06(2020)129].
Aaij, R.; Abellán Beteta, C.; Ackernley, T.; Adeva, B.; Adinolfi, M.; Afsharnia, H.; Aidala, C.A.; Aiola, S.; Ajaltouni, Z.; Akar, S.; Albicocco, P.; ...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/772388
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