Abstract
The HyperCP collaboration reported last year the observation of 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, both within the standard model and 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. If there is a new particle we find that it cannot be a scalar or a vector. If it is a pseudoscalar or axial vector it would lead to significantly enhanced rates in K → ππμ+μ- and → Ξμ +μ- decays.
Original language | English |
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Title of host publication | INTERSECTIONS OF PARTICLE AND NUCLEAR PHYSICS: 9th Conference on the Intersections of Particle and Nuclear Physics, CIPAN2006 |
Pages | 283-286 |
Number of pages | 4 |
Volume | 870 |
DOIs | |
Publication status | Published - 2006 |
Externally published | Yes |
Event | INTERSECTIONS OF PARTICLE AND NUCLEAR PHYSICS: 9th Conference on the Intersections of Particle and Nuclear Physics, CIPAN2006 - Rio Grande, Puerto Rico Duration: 30 May 2006 → 3 Jun 2006 |
Conference
Conference | INTERSECTIONS OF PARTICLE AND NUCLEAR PHYSICS: 9th Conference on the Intersections of Particle and Nuclear Physics, CIPAN2006 |
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Country/Territory | Puerto Rico |
City | Rio Grande |
Period | 30/05/06 → 3/06/06 |
Keywords
- χPT
- BSM
- HyperCP