Search for exotic baryons in 800-GeV pp ---> p Xi+- pi+- X
The authors report the results of a high-statistics, sensitive search for narrow baryon resonances decaying to {Xi}{sup -}{pi}{sup -}, {Xi}{sup -}{pi}{sup +}, {bar {Xi}}{sup +}{pi}{sup +}. The only resonances observed are the well known {Xi}{sup 0}(1530) and {bar {Xi}}{sup 0}(1530). No evidence is found for a state near 1862 MeV, previously reported by NA49[11]. At the 95% confidence level, we find the upper limit for the production of a Gaussian enhancement with {sigma} = 7.6 MeV in the {Xi}{sup -}{pi}{sup -} effective mass spectrum to be 0.3% of the number of observed {Xi}{sup 0}(1530 {yields} {Xi}{sup -}{pi}{sup +}). They find similarly restrictive upper limits for an enhancement at 1862 MeV in the {Xi}{sup -}{pi}{sup +}, {bar {Xi}}{sup +}{pi}{sup +} mass spectra.
- Research Organization:
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC02-76CH03000
- OSTI ID:
- 15020177
- Report Number(s):
- FERMILAB-PUB-05-315-E; PRLTAO; arXiv eprint number hep-ex/0507056; TRN: US0602510
- Journal Information:
- Physical Review Letters, Vol. 95; ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
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