Exclusive photoproduction of the cascade (Xi) hyperon
We report on the first measurement of exclusive {Xi}{sup -}(1321) hyperon photoproduction in {gamma}p {yields} K{sup +}K{sup +}{Xi}{sup -} for 3.2 < E{sub {gamma}} < 3.9 GeV. The final state is identified by the missing mass in p({gamma}, K{sup +}K{sup +})X measured with the CLAS detector at Jefferson Laboratory. We have detected a significant number of the ground-state {Xi}{sup -}(132)1/2{sup +}, and have estimated the total cross section for its production. We have also observed the first excited state {Xi}{sup -}(1530)3/2{sup +}. Photoproduction provides a copious source of {Xi}'s. We discuss the possibilities of a search for the recently proposed {Xi}{sub 5}{sup --} and {Xi}{sub 5}{sup +} pentaquarks.
- Research Organization:
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
- Sponsoring Organization:
- USDOE Office of Energy Research (ER) (US)
- DOE Contract Number:
- AC05-84ER40150
- OSTI ID:
- 836431
- Report Number(s):
- JLAB-PHY-04-46; DOE/ER/40150-3085; nucl-ex/0409030; TRN: US0500591
- Resource Relation:
- Other Information: No journal information given for this preprint; PBD: 1 Sep 2004
- Country of Publication:
- United States
- Language:
- English
Similar Records
Photoproduction of the Xi Hyperons
Production and Searches for Cascade Baryons with CLAS