A search for the decays B0s → μ+ μ− μ+ μ− and B0 → 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(B0s → μ+ μ− μ+ μ−) < 1.6(1.2) x 10^−8 and B(B0 → μ+ μ− μ+ μ−) < 6.6(5.3) x 10^−9 at 95% (90%) confidence level. In addition, limits are set in the context of a supersymmetric model which allows for the B0(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(B0s → S P) < 1.6(1.2) x 10^−8 and B(B0 → S P) < 6.3(5.1) x 10^ −9 at 95% (90%) confidence level.

R. Aaij, C. Abellan Beteta, A. Adametz, B. Adeva, M. Adinolfi, C. Adrover, et al. (2013). Search for Rare B0(s) → μ+ μ− μ+ μ− Decays. PHYSICAL REVIEW LETTERS, 110(21), 1-8 [10.1103/PhysRevLett.110.211801].

Search for Rare B0(s) → μ+ μ− μ+ μ− Decays

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

Abstract

A search for the decays B0s → μ+ μ− μ+ μ− and B0 → 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(B0s → μ+ μ− μ+ μ−) < 1.6(1.2) x 10^−8 and B(B0 → μ+ μ− μ+ μ−) < 6.6(5.3) x 10^−9 at 95% (90%) confidence level. In addition, limits are set in the context of a supersymmetric model which allows for the B0(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(B0s → S P) < 1.6(1.2) x 10^−8 and B(B0 → S P) < 6.3(5.1) x 10^ −9 at 95% (90%) confidence level.
2013
R. Aaij, C. Abellan Beteta, A. Adametz, B. Adeva, M. Adinolfi, C. Adrover, et al. (2013). Search for Rare B0(s) → μ+ μ− μ+ μ− Decays. PHYSICAL REVIEW LETTERS, 110(21), 1-8 [10.1103/PhysRevLett.110.211801].
R. Aaij; C. Abellan Beteta; A. Adametz; B. Adeva; M. Adinolfi; C. Adrover; A. Affolder; Z. Ajaltouni; J. Albrecht; F. Alessio; M. Alexander; S. Ali; G...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/139797
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