Searches for the θ5(1540)+ Strange-Pentaquark Candidate in e+e- Annihilation, Hadroproduction and Electroproduction with the BaBar Detector
- Univ. of Liverpool (United Kingdom)
Since early in 2003, several experiments have presented evidence for the existence of a positive strangeness baryon state of mass around 1540 MeV/c2 and width <8 MeV, the θ(1540), which decays to K+n and K0p. Such a state has minimum quark content udud$$\bar{s}$$ and consequently has been interpreted as the S = +1 member of the anti-decuplet of pentaquark states proposed by Diakonov et al. Subsequently, the NA49 experiment presented evidence for the S = -2 member of the anti-decuplet, the Ξ5 (1860) --, but this has yet to be observed in any other experiment. Results from the search for the production of the θ(1540) memember of the anti-decuplet of pentaquark states using data from e+e - collisions obtained with the BABAR detector at the PEP-II Collider are presented. No signal is observed, and cross section limits for the θ(1540) are given; these prove to be well below the cross section values for ordinary baryons of similar mass. In addition, a search has been carried out for the electroproduction of the θ(1540) in the material of the BABAR detector. Event selection procedures are discussed in detail, the results of this search are presented, and are discussed in the light of several other experiments.
- Research Organization:
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC02-76SF00515
- OSTI ID:
- 970450
- Report Number(s):
- SLAC-R-925; TRN: US1000952
- Country of Publication:
- United States
- Language:
- English
Similar Records
Search for Strange-Pentaquark Production in e{sup +}e{sup -} Annihilation at {radical}(s)=10.58 GeV
Search for Strange-Pentaquark Production in e+e- Annihilation at sqrt{s}=10.58 GeV and in Upsilon(4S) Decays