A search for the decays Bs0→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(Bs0→μ +μ-μ+μ-)<1.6(1.2) ×10-8 and B(B0→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(s)0 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(Bs0→SP)<1.6(1.2)×10-8 and B(B 0→SP)<6.3(5.1)×10-9 at 95% (90%) confidence level. © 2013 CERN.

Aaij, R., Abellan Beteta, C., Adametz, A., Adeva, B., Adinolfi, M., Adrover, C., et al. (2013). Search for rare B(s)0→μ+μ -μ+μ- decays. PHYSICAL REVIEW LETTERS, 110(21) [10.1103/PhysRevLett.110.211801].

Search for rare B(s)0→μ+μ -μ+μ- decays

CALVI, MARTA;KHANJI, BASEM;KUCHARCZYK, MARCIN;Martinelli, M;PEREGO, DAVIDE LUIGI;PESSINA, GIANLUIGI EZIO;
2013

Abstract

A search for the decays Bs0→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(Bs0→μ +μ-μ+μ-)<1.6(1.2) ×10-8 and B(B0→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(s)0 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(Bs0→SP)<1.6(1.2)×10-8 and B(B 0→SP)<6.3(5.1)×10-9 at 95% (90%) confidence level. © 2013 CERN.
Articolo in rivista - Articolo scientifico
Flavour Physics, Hadron Collider
English
2013
Aaij, R., Abellan Beteta, C., Adametz, A., Adeva, B., Adinolfi, M., Adrover, C., et al. (2013). Search for rare B(s)0→μ+μ -μ+μ- decays. PHYSICAL REVIEW LETTERS, 110(21) [10.1103/PhysRevLett.110.211801].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/75137
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