Orateur
Prof.
German Valencia
(Iowa State University)
Description
The HyperCP collaboration observed three events for the decay Sigma^+ -> p mu^+ mu^-. They suggested that new physics may be required to understand the implied decay rate and the observed M_{mumu} distribution. Motivated by this result, we re-examine this mode. First within the standard model, and then assuming there is a new particle.
Within the SM we find that Sigma^+ -> p mu^+ mu^- is long-distance dominated and its rate falls within the range suggested by the HyperCP measurement. We then examine the conditions under which the observation is consistent with a light Higgs boson and find an explicit example that satisfies all the constraints: the light pseudoscalar Higgs boson in the next-to-minimal supersymmetric standard model, the A_1^0.
Auteur principal
Prof.
German Valencia
(Iowa State University)
