Search for {sigma}{sub 5}{sup 0},N{sub 5}{sup 0}, and {theta}{sup ++} pentaquark states
Journal Article
·
· Physical Review. C, Nuclear Physics
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)
- University of Glasgow, Glasgow, Scotland (United Kingdom)
- Physics Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
- Nuclear Physics Institute, St. Petersburg RU-188300 (Russian Federation)
- Department of Physics, University of Virginia, Charlottesville, Virginia 22904 (United States)
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606 (United States)
A high-resolution ({sigma}{sub instr.}=1.5 MeV) search for narrow states ({gamma}<10 MeV) with masses of M{sub x}{approx_equal}1500-1850 MeV in ep{yields}e{sup '}K{sup +}X,e{sup '}K{sup -}X, and e{sup '}{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.
- OSTI ID:
- 20995325
- Journal Information:
- Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 5 Vol. 75; ISSN 0556-2813; ISSN PRVCAN
- Country of Publication:
- United States
- Language:
- English
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