A search for the lepton-flavor-violating decays B0s → e± μ∓ and B0 → e± μ∓ is performed with a data sample, corresponding to an integrated luminosity of 1.0 fb^−1 of pp collisions at √s=7 TeV, collected by the LHCb experiment. The observed number of B0s → e± μ∓ and B0 → e± μ∓ candidates is consistent with background expectations. Upper limits on the branching fractions of both decays are determined to be B(B0s → e± μ∓) < 1.1(1.4) x 10^−8 and B(B0 → e± μ∓) < 2.8(3.7) x 10^−9 at 90% (95%) confidence level (C.L.). These limits are a factor of 20 lower than those set by previous experiments. Lower bounds on the Pati-Salam leptoquark masses are also calculated, M_LQ(B0s → e± μ∓) > 101 TeV/c2 and MLQ(B0 → e± μ∓) > 126 TeV/c2 at 95% C.L., and are a factor of 2 higher than the previous bounds.

R. Aaij, B. Adeva, M. Adinolfi, C. Adrover, A. Affolder, Z. Ajaltouni, et al. (2013). Search for the Lepton-Flavor-Violating Decays B0s → e± μ∓ and B0 → e± μ∓. PHYSICAL REVIEW LETTERS, 111(14), 1-9 [10.1103/PhysRevLett.111.141801].

Search for the Lepton-Flavor-Violating Decays B0s → e± μ∓ and B0 → e± μ∓

CARBONE, ANGELO;GALLI, DOMENICO;PATRIGNANI, CLAUDIA;PERAZZINI, STEFANO;VAGNONI, VINCENZO MARIA;ZANGOLI, MARIA;
2013

Abstract

A search for the lepton-flavor-violating decays B0s → e± μ∓ and B0 → e± μ∓ is performed with a data sample, corresponding to an integrated luminosity of 1.0 fb^−1 of pp collisions at √s=7 TeV, collected by the LHCb experiment. The observed number of B0s → e± μ∓ and B0 → e± μ∓ candidates is consistent with background expectations. Upper limits on the branching fractions of both decays are determined to be B(B0s → e± μ∓) < 1.1(1.4) x 10^−8 and B(B0 → e± μ∓) < 2.8(3.7) x 10^−9 at 90% (95%) confidence level (C.L.). These limits are a factor of 20 lower than those set by previous experiments. Lower bounds on the Pati-Salam leptoquark masses are also calculated, M_LQ(B0s → e± μ∓) > 101 TeV/c2 and MLQ(B0 → e± μ∓) > 126 TeV/c2 at 95% C.L., and are a factor of 2 higher than the previous bounds.
2013
R. Aaij, B. Adeva, M. Adinolfi, C. Adrover, A. Affolder, Z. Ajaltouni, et al. (2013). Search for the Lepton-Flavor-Violating Decays B0s → e± μ∓ and B0 → e± μ∓. PHYSICAL REVIEW LETTERS, 111(14), 1-9 [10.1103/PhysRevLett.111.141801].
R. Aaij; B. Adeva; M. Adinolfi; C. Adrover; A. Affolder; Z. Ajaltouni; J. Albrecht; F. Alessio; M. Alexander; S. Ali; G. Alkhazov; P. Alvarez Cartelle...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/182705
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