Contributions from SUSY-FCNC couplings to the interpretation of the HyperCP events for the decay Σ^+ \to p μ^+ μ^-

Abstract

The observation of three events for the decay ${\Sigma }^{+}\to p{\mu }^{+}{\mu }^{-}$ with a dimuon invariant mass of $214.3\pm 0.5$MeV by the HyperCP collaboration imply that a new particle X may be needed to explain the observed dimuon invariant mass distribution. We show that there are regions in the SUSY-FCNC parameter space where the $A_1^0$ in the NMSSM can be used to explain the HyperCP events without contradicting all the existing constraints from the measurements of the kaon decays, and the constraints from the $K^0-{\bar{K}}^0$ mixing are automatically satisfied once the constraints from kaon decays are satisfied.

18 pages, 7 figures

References in corpus (1)

• Radiative quarkonium decays and the NMSSM Higgs interpretation of the HyperCP Sigma+ --> p mu+mu- events

Cited by in corpus (2)

• Rare Decays with a Light CP-Odd Higgs Boson in the NMSSM
• Sigma to p mu+ mu-: Standard Model or New Particle?