Search for exotic decays from low-energy {ital e}{sup +}{ital e}{sup {minus}} direct annihilation
- Randall Laboratory of Physics, University of Michigan, Ann Arbor, Michigan 48109 (United States)
A new exotic-decay candidate is proposed to resolve the orthopositronium decay rate discrepancy. A search has been performed for the process {ital e}{sup +}{ital e}{sup {minus}}{r_arrow}{gamma}+{ital X}{sup 0}, where the {ital X}{sup 0} is a long-lived, low-mass boson that interacts very weakly with matter and has a charge conjugation eigenvalue {ital C}={minus}1. No evidence for the {ital X}{sup 0} has been found in this experiment, with essentially the entire {ital X}{sup 0} mass range from 0.1 to 1 MeV being excluded as the cause of the decay rate discrepancy. Previous results from other experiments are analyzed for sensitivity to this {ital X}{sup 0}.
- OSTI ID:
- 45687
- Journal Information:
- Physical Review, D, Journal Name: Physical Review, D Journal Issue: 11 Vol. 51; ISSN PRVDAQ; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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