Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/133324
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)

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