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.

Search for rare B(s)0→μ+μ -μ+μ- decays / R., A., C. A., B., A., A., B., A., M., A., C., A., A., A., Z., A., J., A., F., A., M., A., S., A., G., A., P. A., C., J. A., A., S., A., Y., A., L., A., J., A., R., A., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 110:21(2013). [10.1103/physrevlett.110.211801]

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

PENSO, Gianni;SARTI, ALESSIO;SCIUBBA, Adalberto;
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.
2013
01 Pubblicazione su rivista::01a Articolo in rivista
Search for rare B(s)0→μ+μ -μ+μ- decays / R., A., C. A., B., A., A., B., A., M., A., C., A., A., A., Z., A., J., A., F., A., M., A., S., A., G., A., P. A., C., J. A., A., S., A., Y., A., L., A., J., A., R., A., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 110:21(2013). [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/11573/560416
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