2013/03/31 by LHCb collaboration, R. Aaij, C. Abellán Beteta +628
Physics and Astronomy · #Dark Matter and Cosmic Phenomena #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ex
paper · pdf · doi:10.1103/physrevlett.110.211801
published as Phys. Rev. Lett. 110, 211801 (2013) · 6 pages, 3 figures
arxiv created 2013/05/17 · openalex publication_date 2013/05/21 · arxiv updated 2013/05/28 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/03
A search for the decays Bs0\ensuremath→\ensuremathμ+\ensuremathμ^\ensuremath-\ensuremathμ+\ensuremathμ^\ensuremath- and B0\ensuremath→\ensuremathμ+\ensuremathμ^\ensuremath-\ensuremathμ+\ensuremathμ^\ensuremath- is performed using data, corresponding to an integrated luminosity of 1.0 fb^\ensuremath-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\ensuremath→\ensuremathμ+\ensuremathμ^\ensuremath-\ensuremathμ+\ensuremathμ^\ensuremath-)<1.6(1.2)\ifmmode×\else\texttimes\fi10^\ensuremath-8 and B(B0\ensuremath→\ensuremathμ+\ensuremathμ^\ensuremath-\ensuremathμ+\ensuremathμ^\ensuremath-)<6.6(5.3)\ifmmode×\else\texttimes\fi10^\ensuremath-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 \ensuremathμ+\ensuremathμ^\ensuremath-. The branching fraction limits for these decays are B(Bs0\ensuremath→SP)<1.6(1.2)\ifmmode×\else\texttimes\fi10^\ensuremath-8 and B(B0\ensuremath→SP)<6.3(5.1)\ifmmode×\else\texttimes\fi10^\ensuremath-9 at 95% (90%) confidence level.