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 language | English |
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Title of host publication | Proceedings of the 43rd Rencontres de Moriond - 2008 Electroweak Interactions and Unified Theories, EW 2008 |
Publisher | The Gioi Publishers |
Pages | 301-306 |
Number of pages | 6 |
Publication status | Published - 2008 |
Externally published | Yes |
Event | 43rd Rencontres de Moriond on Electroweak Interactions and Unified Theories, EW 2008 - La Thuile, Italy Duration: 1 Mar 2008 → 8 Mar 2008 |
Conference
Conference | 43rd Rencontres de Moriond on Electroweak Interactions and Unified Theories, EW 2008 |
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Country/Territory | Italy |
City | La Thuile |
Period | 1/03/08 → 8/03/08 |