More about sgoldstino interpretation of HyperCP events

Abstract

We further discuss possible sgoldstino interpretation of the observation, reported by the HyperCP collaboration, of three \Sigma^+\to p\mu^+\mu^- decay events with dimuon invariant mass 214.3 MeV within detector resolution. With sgoldstino mass equal to 214.3 MeV, this interpretation can be verified at existing and future B- and \phi-factories. We find that the most natural values of the branching ratios of two-body B- and D-meson decays to sgoldstino P and vector meson V are about 10^{-6}\div10^{-7}. The branching ratios of \phi-meson decay \phi\to P\gamma is estimated to be in the range 1.8\cdot 10^{-13} \div 1.6\cdot 10^{-7}, depending on the hierarchy of supersymmetry breaking soft terms. Similar branchings for \rho- and \omega-mesons are in the range 10^{-14}\div 3.4\cdot 10^{-7}.