Upper limits for the photoproduction cross section for the Phi--(1860) pentaquark state off the deuteron

Journal Article · Sun Jan 01 00:00:00 EST 2012 · Physical Review, C (Nuclear Physics)

DOI:https://doi.org/10.1103/PhysRevC.85.015205· OSTI ID:1034415

Egiyan, Hovanes

We searched for the {Phi}{sup --}(1860) pentaquark in the photoproduction process off the deuteron in the {Xi}{sup -} {pi}{sup -} decay channel using CLAS. The invariant mass spectrum of the {Xi}{sup -} {pi}{sup -} system does not indicate any statistically significant enhancement near the reported mass M = 1.860 GeV. The statistical analysis of the sideband-subtracted mass spectrum yields a 90% confidence level upper limit of 0.7 nb for the photoproduction cross section of {Phi}{sup --}(1860) with a consecutive decay into {Xi}{sup -} {pi}{sup -} in the photon energy range 4.5 GeV < E{sub {gamma}} < 5.5 GeV.

• Research Organization: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: AC05-06OR23177
• OSTI ID: 1034415
• Report Number(s): JLAB-PHY-11-1438; DOE/OR/23177-1840; arXiv:1109.1238; PRVCAN; TRN: US1200814
• Journal Information: Physical Review, C (Nuclear Physics), Vol. 85, Issue 1; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CROSS SECTIONS
DECAY
DEUTERONS
ENERGY RANGE
PHOTONS
PHOTOPRODUCTION