A search for {Sigma}{sup 0}{sub 5}, N{sup 0}{sub 5} and {Theta}{sup ++} pentaquark states.
A high-resolution ({sigma}{sub instr.} = 1.5 MeV) search for narrow states ({Lambda} < 10 MeV) with masses of M{sub x} {approx} 1500-1850 MeV in ep {yields} e{prime}K{sup +}X,e{prime}K{sup -}X, and e{prime}{pi}{sup +}X electroproduction at small angles and low Q{sup 2} was performed. These states would be candidate partner states of the reported {Theta}{sup +}(1540) pentaquark. No statistically significant signal was observed in any of the channels at 90% C.L. Upper limits on forward production were determined to be between 0.8% and 4.9% of the {Lambda}(1520) production cross section, depending on the channel and the assumed mass and width of the state.
- Research Organization:
- Argonne National Laboratory (ANL)
- Sponsoring Organization:
- SC; FOR; NSF
- DOE Contract Number:
- AC02-06CH11357
- OSTI ID:
- 940684
- Report Number(s):
- ANL/PHY/JA-57534
- Journal Information:
- Phys. Rev. C, Journal Name: Phys. Rev. C Journal Issue: 2007 Vol. 75; ISSN 0556-2813; ISSN PRVCAN
- Country of Publication:
- United States
- Language:
- ENGLISH
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