A first search at LHCb for the lepton-flavour-violating decays B0 → K*0τ±e∓ is presented. The analysis is performed using a sample of proton-proton collision data, collected with the LHCb detector at a centre-of-mass energy of 13 TeV between 2016 and 2018, corresponding to an integrated luminosity of 5.4 fb−1. No significant signal is observed, and upper limits on the branching fractions are determined to be B(B0→K∗0τ−e+)<5.97.1×10−6 and B(B0→K∗0τ+e−)<4.95.9×10−6 at the 90% (95%) confidence level. These results correspond to the current most stringent upper limits for b → sτl transitions.

Aaij, R., Abdelmotteleb, A., Abellan Beteta, C., Abudinen, F., Ackernley, T., Adefisoye, A., et al. (2025). Search for the lepton-flavour-violating decays B0→ K*0τ±e∓. JOURNAL OF HIGH ENERGY PHYSICS, 2025(11) [10.1007/JHEP11(2025)172].

Search for the lepton-flavour-violating decays B0→ K*0τ±e∓

Anelli A.;Borsato M.;Calvi M.;Capelli S.;Carniti P.;Falcao L. N.;Fazzini D.;Garcia Pardinas J.;Gotti C.;Kirsebom V. S.;Malentacca L.;Martinazzoli L.;Martinelli M.;Minotti A.;Pizzichemi M.;Salomoni M.;
2025

Abstract

A first search at LHCb for the lepton-flavour-violating decays B0 → K*0τ±e∓ is presented. The analysis is performed using a sample of proton-proton collision data, collected with the LHCb detector at a centre-of-mass energy of 13 TeV between 2016 and 2018, corresponding to an integrated luminosity of 5.4 fb−1. No significant signal is observed, and upper limits on the branching fractions are determined to be B(B0→K∗0τ−e+)<5.97.1×10−6 and B(B0→K∗0τ+e−)<4.95.9×10−6 at the 90% (95%) confidence level. These results correspond to the current most stringent upper limits for b → sτl transitions.
Articolo in rivista - Articolo scientifico
B Physics; Beyond Standard Model; Hadron-Hadron Scattering; Rare Decay;
English
26-nov-2025
2025
2025
11
172
none
Aaij, R., Abdelmotteleb, A., Abellan Beteta, C., Abudinen, F., Ackernley, T., Adefisoye, A., et al. (2025). Search for the lepton-flavour-violating decays B0→ K*0τ±e∓. JOURNAL OF HIGH ENERGY PHYSICS, 2025(11) [10.1007/JHEP11(2025)172].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/591221
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