b\to sν\barν decay in the MSSM: Implication of b\to sγat large tan beta

Details b\to sν\barν decay in the MSSM: Implication of b\to sγat large tan beta b\to sν\barν decay in the MSSM: Implication of b\to sγat large tan beta

2007-09-07

arxiv.org/abs/0709.1022v2

Phys.Rev.D77:014025,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

17 pages, references added, figures refined

Scientific paper

10.1103/PhysRevD.77.014025

The decay $b\to s\nu\bar{\nu}$ is discussed in the minimal supersymmetric standard model with general flavor mixing for squarks, at large $\tan\beta$. In this case, in addition to the chargino loop contributions which were analyzed in previously studies, $\tan\beta$-enhanced contributions from the gluino and charged Higgs boson loops might become sizable compared with the standard model contribution, at least in principle. However, it is demonstrated that the experimental bounds on the new physics contributions to the radiative decay $b\to s\gamma$ should strongly constrain these contributions to $b\to s\nu\bar{\nu}$, especially on the gluino contribution. We also briefly comment on a possible constraint from the $B_s\to\mu^+\mu^-$ decay.

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