A search for the lepton-flavour violating decays B0s → 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 B0s → 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(B0s → e± μ∓) < 6.3(5.4) × 10^−9 and B(B0s → e± μ∓) < 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± μ∓) < 1.3(1.0) × 10^−9 at 95% (90%) confidence level. These are the strongest limits on these decays to date.

Aaij, R., Adeva, B., Adinolfi, M., Ajaltouni, Z., Akar, S., Albrecht, J., et al. (2018). Search for the Lepton-Flavour Violating Decays B0(s) → e± μ∓. JOURNAL OF HIGH ENERGY PHYSICS, 2018(3), 0-19 [10.1007/JHEP03(2018)078].

Search for the Lepton-Flavour Violating Decays B0(s) → e± μ∓

Betti, F.;Capriotti, L.;Carbone, A.;Ferrari, F.;Galli, D.;Marconi, U.;Patrignani, C.;Perazzini, S.;Pisani, F.;Vagnoni, V.;Zucchelli, S.
2018

Abstract

A search for the lepton-flavour violating decays B0s → 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 B0s → 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(B0s → e± μ∓) < 6.3(5.4) × 10^−9 and B(B0s → e± μ∓) < 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± μ∓) < 1.3(1.0) × 10^−9 at 95% (90%) confidence level. These are the strongest limits on these decays to date.
2018
Aaij, R., Adeva, B., Adinolfi, M., Ajaltouni, Z., Akar, S., Albrecht, J., et al. (2018). Search for the Lepton-Flavour Violating Decays B0(s) → e± μ∓. JOURNAL OF HIGH ENERGY PHYSICS, 2018(3), 0-19 [10.1007/JHEP03(2018)078].
Aaij, R.; Adeva, B.; Adinolfi, M.; Ajaltouni, Z.; Akar, S.; Albrecht, J.; Alessio, F.; Alexander, M.; Alfonso Albero, A.; Ali, S.; Alkhazov, G.; Alvar...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/634492
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