Constraints on the new particle in Sigma(+) -> p mu(+)mu(-)

[[abstract]]The HyperCP Collaboration has presented the branching ratio of Sigma(+) -> p mu(+)mu(-) to be (8.6(-5.4)(+6.6) +/- 5.5) x 10(-8) and suggested a new boson P-0 with a mass of 214.3 +/- 0.5 MeV to induce the flavor changing transition of s -> d mu(+)mu(-). We demonstrate that to explain the data, the new particle cannot be a scalar but psendoscalar based on the direct constraints from K+ -> pi(+)mu(+)mu(-) and K-L -> mu(+)mu(-), respectively. Moreover, we determine that the decay width of the pseudoscalar should be in the range of 10(-7) MeV with the lifetime of 10(-14) S.[[fileno]]2010129010087[[department]]物理