Cascade Spectroscopy and Recent Xi* Photo-production Results from CLAS
Doubly-strange baryon resonances provide new insights into baryon structure. The standard QCD Lagrangian implies that for every N* and Delta* resonance, there should be a corresponding Xi (cascade resonance). This is due to the flavor symmetry of the strong force. Therefore, one can investigate baryon structure by observing aspects of the doubly-strange baryons like regularities such as parity doublets. At energies above approximately 1.5 GeV, the light-quark baryon resonances are broad and overlap while the cascades in this range are narrow and therefore more readily observed. An overview of the world cascade spectrum and a comparison to the lighter baryon spectra will be presented. Recent results from an on-going analysis from the G12 (5.4 GeV) photo-production experiment using the CLAS detector at JLab will be highlighted.
- 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:
- 990283
- Report Number(s):
- JLAB-PHY-09-1111; DOE/OR/23177-1341; TRN: US1007280
- Journal Information:
- AIP Conf.Proc., Vol. 1257, Issue 1; Conference: Hadron 2009, 29 Nov - 4 Dec 2009, Tallahassee, Florida
- Country of Publication:
- United States
- Language:
- English
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