Σ+ → pμ+μ-: Standard model or new particle?

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review

Abstract

The HyperCP collaboration observed three events for the decay Σ+ → pμ+μ-. They suggested that new physics may be required to understand the implied decay rate and the observed mμμ 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 Σ+ → pμ+μ- 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 (NMSSM).

Original languageEnglish
Title of host publicationProceedings of the 43rd Rencontres de Moriond - 2008 Electroweak Interactions and Unified Theories, EW 2008
PublisherThe Gioi Publishers
Pages301-306
Number of pages6
Publication statusPublished - 2008
Externally publishedYes
Event43rd Rencontres de Moriond on Electroweak Interactions and Unified Theories, EW 2008 - La Thuile, Italy
Duration: 1 Mar 20088 Mar 2008

Conference

Conference43rd Rencontres de Moriond on Electroweak Interactions and Unified Theories, EW 2008
Country/TerritoryItaly
CityLa Thuile
Period1/03/088/03/08

Cite this