Sgoldstino interpretation of HyperCP events
Abstract
We discuss possible sgoldstino interpretation of the observation, reported by HyperCP collaboration, of three Σ+→pμ+μ- decay events with dimuon invariant mass 214.3 MeV within detector resolution. We find that this interpretation is consistent in models with (i) parity conservation in sgoldstino interactions, (ii) pseudoscalar sgoldstino P of mass 214 MeV and heavier scalar sgoldstino, and (iii) low supersymmetry breaking scale, F=2.5-60 TeV. In these models, sgoldstino can be observed in decays K+→π+π0P, KL→ππP and KS→ππP at the branching ratios of at least of order 10-12, 10-8 and 10-11, respectively. The model can be probed also at e+e- colliders in the channels e+e-→γP and e+e-→e+e-P, where the cross section is likely to be in the range 1 pb-5 ab.
- Publication:
-
Physical Review D
- Pub Date:
- February 2006
- DOI:
- 10.1103/PhysRevD.73.035002
- arXiv:
- arXiv:hep-ph/0509147
- Bibcode:
- 2006PhRvD..73c5002G
- Keywords:
-
- 14.80.-j;
- 12.60.Jv;
- 13.20.Eb;
- 13.30.-a;
- Other particles;
- Supersymmetric models;
- Decays of K mesons;
- Decays of baryons;
- High Energy Physics - Phenomenology;
- High Energy Physics - Experiment
- E-Print:
- 14 pages, 1 figure