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Title: Observation of a narrow structure in 1 H( γ , K S 0 ) X via interference with φ -meson production

We report observation of a narrow peak structure at ≈1.54 GeV with a Gaussian width σ = 6 MeV in the missing mass of K S in the reaction γ + p → pK SK L. The observed structure may be due to the interference between a strange (or antistrange) baryon resonance in the pK L system and the φ(K SK L) photoproduction leading to the same final state. The statistical significance of the observed excess of events estimated as the log-likelihood ratio of the resonant signal + background hypothesis and the φ-production-based background-only hypothesis corresponds to 5.3σ.
Authors:
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Publication Date:
Report Number(s):
JLAB-PHY-12-1500; DOE/OR/23177-2042; arXiv:1110.3325
Journal ID: ISSN 0556-2813; PRVCAN; TRN: US1201835
Grant/Contract Number:
AC05-06OR23177
Type:
Accepted Manuscript
Journal Name:
Physical Review. C, Nuclear Physics
Additional Journal Information:
Journal Volume: 85; Journal Issue: 3; Journal ID: ISSN 0556-2813
Publisher:
American Physical Society (APS)
Research Org:
Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
Sponsoring Org:
USDOE Office of Science (SC)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; BARYONS; HYPOTHESIS; MISSING MASS; PHOTOPRODUCTION; PRODUCTION
OSTI Identifier:
1038249