A search for the lepton-flavor-violating decays Bs0→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 Bs0→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(Bs0→e±μ∓)<1.1(1.4)×10-8 and B(B0→e±μ∓)<2.8(3.7)×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, MLQ(Bs0→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.

Search for the Lepton-Flavor-Violating Decays B_{s}^{0}→e^{±}μ^{∓} and B^{0}→e^{±}μ^{∓}

BALDINI, Wander;BOZZI, Concezio;FIORE, Marco;SAVRIE', Mauro;
2013

Abstract

A search for the lepton-flavor-violating decays Bs0→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 Bs0→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(Bs0→e±μ∓)<1.1(1.4)×10-8 and B(B0→e±μ∓)<2.8(3.7)×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, MLQ(Bs0→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; J., Albrecht; F., Alessio; M., Alexander; S., Ali; G., Alkhazov; P., Alva...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11392/2090612
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