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arXiv · 0712.0257

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

Gao Xiangdong·Chong Sheng Li·Zhao Li·Hao Zhang
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Abstract

The observation of three events for the decay $Σ^+ \to p μ^+ μ^-$ with a dimuon invariant mass of $214.3\pm0.5$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 $A^0_1$ 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.

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Gao Xiangdong, Chong Sheng Li, Zhao Li, Hao Zhang. 2007-12-03. Contributions from SUSY-FCNC couplings to the interpretation of the HyperCP events for the decay Σ^+ \to p μ^+ μ^-. https://doi.org/10.1140/epjc%2Fs10052-008-0580-z

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