Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/133352
Title: Search for Rare B0(s)→μ+μ−μ+μ− Decays
Author: Abellan Beteta, Carlos
Calvo Gómez, Míriam
Camboni, Alessandro
Comerma Montells, Albert
Domingo Bonal, Francesc
Garrido Beltrán, Lluís
Graciani Díaz, Ricardo
Graugés Pous, Eugeni
López Asamar, Elias
Pérez-Calero Yzquierdo, Antonio
Picatoste Olloqui, Eduardo
Potterat, Cédric
Rives Molina, Vicente José
Ruiz, Hugo (Ruiz Pérez)
Vázquez Gómez, Ricard
Vilasis-Cardona, Xavier
LHCb Collaboration
Keywords: Física de partícules
Experiments
Particle physics
Experiments
Issue Date: 21-May-2013
Publisher: American Physical Society
Abstract: A search for the decays B 0 s → μ + μ − μ + μ − and B 0 → μ + μ − μ + μ − is performed using data, corresponding to an integrated luminosity of 1.0     fb − 1 , collected with the LHCb detector in 2011. The number of candidates observed is consistent with the expected background and, assuming phase-space models of the decays, limits on the branching fractions are set: B ( B 0 s → μ + μ − μ + μ − ) < 1.6 ( 1.2 ) × 10 − 8 and B ( B 0 → μ + μ − μ + μ − ) < 6.6 ( 5.3 ) × 10 − 9 at 95% (90%) confidence level. In addition, limits are set in the context of a supersymmetric model which allows for the B 0 ( s ) meson to decay into a scalar ( S ) and pseudoscalar particle ( P ), where S and P have masses of 2.5     GeV / c and 214.3     MeV / c , respectively, both resonances decay into μ + μ − . The branching fraction limits for these decays are B ( B 0 s → S P ) < 1.6 ( 1.2 ) × 10 − 8 and B ( B 0 → S P ) < 6.3 ( 5.1 ) × 10 − 9 at 95% (90%) confidence level.
Note: Reproducció del document publicat a: https://doi.org/10.1103/PhysRevLett.110.211801
It is part of: Physical Review Letters, 2013, vol. 110, num. 21
URI: http://hdl.handle.net/2445/133352
Related resource: https://doi.org/10.1103/PhysRevLett.110.211801
ISSN: 0031-9007
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)

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