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Title: | Search for the Lepton-Flavor-Violating Decays Bs0→e±μ∓ and B0→e±μ∓ |
Author: | Calvo Gómez, Míriam Camboni, Alessandro Comerma Montells, Albert Garrido Beltrán, Lluís Graciani Díaz, Ricardo Graugés Pous, Eugeni Oyanguren Campos, Arantza de Pérez-Calero Yzquierdo, Antonio Picatoste Olloqui, Eduardo Potterat, Cédric Rives Molina, Vicente José Ruiz, Hugo (Ruiz Pérez) Ruiz Valls, Pablo Vilasis-Cardona, Xavier LHCb Collaboration |
Keywords: | Física de partícules Experiments Particle physics Experiments |
Issue Date: | 30-Sep-2013 |
Publisher: | American Physical Society |
Abstract: | A search for the lepton-flavor-violating decays B 0 s → e ± μ ∓ and B 0 → e ± μ ∓ is performed with a data sample, corresponding to an integrated luminosity of 1.0 fb − 1 of p p collisions at √ s = 7 TeV , collected by the LHCb experiment. The observed number of B 0 s → e ± μ ∓ and B 0 → e ± μ ∓ candidates is consistent with background expectations. Upper limits on the branching fractions of both decays are determined to be B ( B 0 s → e ± μ ∓ ) < 1.1 ( 1.4 ) × 10 − 8 and B ( B 0 → 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, M LQ ( B 0 s → e ± μ ∓ ) > 101 TeV / c 2 and M LQ ( B 0 → e ± μ ∓ ) > 126 TeV / c 2 at 95% C.L., and are a factor of 2 higher than the previous bounds. |
Note: | Reproducció del document publicat a: https://doi.org/10.1103/PhysRevLett.111.141801 |
It is part of: | Physical Review Letters, 2013, vol. 111, num. 14, p. 141801 |
URI: | http://hdl.handle.net/2445/133324 |
Related resource: | https://doi.org/10.1103/PhysRevLett.111.141801 |
ISSN: | 0031-9007 |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB)) |
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