Measurement of inclusive Lambda (1520) photoproduction on deuteron

Conference · Thu Nov 01 04:00:00 EDT 2007

OSTI ID:1963873

Hicks, Kenneth ^[1]; Mibe, Tsutomu ^[1]; Stepanyan, Stepan ^[2]

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1. Ohio Univ., Athens, OH (United States)
2. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)

The possible observation of the gamma-n --> K-Theta+ reaction in LEPS and non-observation of the reaction gamma-p --> K0=Theta+ in CLAS would require a large isospin asymmetry in the cross section. In 2005, Nam, Hosaka and Kim proposed a large isospin asymmetry in the cross section due to the possible absence of a contact term (Kroll-Ruderman term) in production from the neutron of a Theta+ with spin 3/2. The Lambda (1520) is a well-established excited hyperon with spin and parity JP = 3/2?. If a large isospin asymmetry exists in the Theta+ photoproduction (sigma_n(Theta+) >> sigma_p(Theta+)), then a similar but opposite cross section asymmetry is predicted in the photoproduction of Lambda (1520) from the proton and neutron (sigma_n(Lambda*) << sigma_p(Lambda*)). This talk will report the measurement of differential cross sections and decay angular distributions for the inclusive reaction gamma-d --> Lambda (1520)X at Jefferson Laboratory using the CLAS detector. Data for Lambda (1520) photoproduction from both proton and neutron targets will be discussed.

• Research Organization: Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Nuclear Physics (NP)
• DOE Contract Number: AC05-06OR23177
• OSTI ID: 1963873
• Report Number(s): JLAB-PHY-07-947; DOE/OR/23177-5894
• Country of Publication: United States
• Language: English