A search for the lepton-flavour violating decays Bs0→ e±μ∓and B0→ e±μ∓is performed based on a sample of proton-proton collision data corresponding to an integrated luminosity of 3 fb−1, collected with the LHCb experiment at centre-of-mass energies of 7 and 8 TeV. The observed yields are consistent with the background-only hypothesis. Upper limits on the branching fraction of the Bs0→ e±μ∓decays are evaluated both in the hypotheses of an amplitude completely dominated by the heavy eigenstate and by the light eigenstate. The results are @@ℬ(Bs0→e)<6.3(5.4)×10−9 and @@ℬ(Bs0→e)<7.2(6.0)×10−9 at 95% (90%) confidence level, respectively. The upper limit on the branching fraction of the B0→ e±μ∓decay is also evaluated, obtaining @@ℬ(B0→e)<1.3(1.0)×10−9 at 95% (90%) confidence level. These are the strongest limits on these decays to date.[Figure not available: see fulltext.]

Aaij, R., Adeva, B., Adinolfi, M., Ajaltouni, Z., Akar, S., Albrecht, J., et al. (2018). Search for the lepton-flavour violating decays B(s)0→ e±μ∓. JOURNAL OF HIGH ENERGY PHYSICS, 2018(3) [10.1007/JHEP03(2018)078].

Search for the lepton-flavour violating decays B(s)0→ e±μ∓

Belloli, N.;Borsato, M.;Calvi, M.;Carniti, P.;Cassina, L.;Fazzini, D.;Gotti, C.;Grillo, L.;Khanji, B.;Martinelli, M.;Matteuzzi, C.;Petruzzo, M.;
2018

Abstract

A search for the lepton-flavour violating decays Bs0→ e±μ∓and B0→ e±μ∓is performed based on a sample of proton-proton collision data corresponding to an integrated luminosity of 3 fb−1, collected with the LHCb experiment at centre-of-mass energies of 7 and 8 TeV. The observed yields are consistent with the background-only hypothesis. Upper limits on the branching fraction of the Bs0→ e±μ∓decays are evaluated both in the hypotheses of an amplitude completely dominated by the heavy eigenstate and by the light eigenstate. The results are @@ℬ(Bs0→e)<6.3(5.4)×10−9 and @@ℬ(Bs0→e)<7.2(6.0)×10−9 at 95% (90%) confidence level, respectively. The upper limit on the branching fraction of the B0→ e±μ∓decay is also evaluated, obtaining @@ℬ(B0→e)<1.3(1.0)×10−9 at 95% (90%) confidence level. These are the strongest limits on these decays to date.[Figure not available: see fulltext.]
Articolo in rivista - Articolo scientifico
B physics; Branching fraction; Flavor physics; Hadron-Hadron scattering (experiments); Rare decay; Nuclear and High Energy Physics
English
2018
2018
3
78
open
Aaij, R., Adeva, B., Adinolfi, M., Ajaltouni, Z., Akar, S., Albrecht, J., et al. (2018). Search for the lepton-flavour violating decays B(s)0→ e±μ∓. JOURNAL OF HIGH ENERGY PHYSICS, 2018(3) [10.1007/JHEP03(2018)078].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/199569
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