Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2001-08-03
Phys.Rev.Lett.87:251804,2001
Physics
High Energy Physics
High Energy Physics - Phenomenology
bug in numerics (affecting the figs.) fixed, discussion of A_0<>0 added, accepted by PRL
Scientific paper
10.1103/PhysRevLett.87.251804
We analyse the rare decay mode B_s -> mu^+ mu^- in the minimal supergravity scenario (mSUGRA). We find a strong correlation with the muon anomalous magnetic moment (g-2)_mu. An interpretation of the recently measured excess in (g-2)_mu in terms of mSUGRA corrections implies a substantial supersymmetric enhancement of the branching ratio Br(B_s -> mu^+ mu^-): if (g-2)_mu exceeds the Standard Model prediction by 4*10^{-9}, Br(B_s -> mu^+ mu^-) is larger by a factor of 10-100 than in the Standard Model and within reach of Run-II of the Tevatron. Thus an experimental search for B_s -> mu^+ mu^- is a stringent test of the mSUGRA GUT scale boundary conditions. If the decay B_s -> mu^+ mu^- is observed at Run-II of the Tevatron, then we predict the mass of the lightest supersymmetric Higgs boson to be less than 120 GeV. The decay B_s -> mu^+ mu^- can also significantly probe the favoured parameter range in SO(10) SUSY GUT models.
Dedes Athanasios
Dreiner Herbert K.
Nierste Ulrich
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