Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2006-10-27
Phys.Rev.Lett.98:081802,2007
Physics
High Energy Physics
High Energy Physics - Phenomenology
7 pages, 2 figures
Scientific paper
10.1103/PhysRevLett.98.081802
The HyperCP collaboration has observed three events for the decay Sigma^+ -> p mu^+ mu^- which may be interpreted as a new particle of mass 214.3 MeV. However, existing data from kaon and B-meson decays severely constrain this interpretation, and it is nontrivial to construct a model consistent with all the data. In this letter we show that the ``HyperCP particle'' can be identified with the light pseudoscalar Higgs boson in the next-to-minimal supersymmetric standard model, the A_1^0. In this model there are regions of parameter space where the A_1^0 can satisfy all the existing constraints from kaon and B-meson decays and mediate Sigma^+ -> p mu^+ mu^- at a level consistent with the HyperCP observation.
He Xiao-Gang
Tandean Jusak
Valencia German
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