Measurement of the Induced Polarization of Lambda (1116) in Kaon Electroproduction with CLAS
The CLAS Collaboration is using the p(e,e[prime]K+p)pi- reaction to measure the induced polarization of the electroproduced Lambda(1116). In this experiment a 5.499-GeV electron beam was incident upon an unpolarized liquid-hydrogen target. The CEBAF Large Acceptance Spectrometer (CLAS) was used to detect the scattered electron, the kaon, and the decay proton from the Lambda hyperon. CLAS allowed for a large kinematic acceptance in Q2(0.75<=Q2<=3.5 GeV2) and W(1.6<=W<=3.0 GeV), as well as the kaon center-of-mass scattering angle. The goal is to map out the kinematic dependencies for the induced polarization in order to provide new constraints on models of K-hyperon production. Along with previously published photo- and electroproduction cross sections and polarization observables from CLAS, LEPS, SAPHIR, and GRAAL, these new induced polarization data are needed in coupled-channel analyses to search for previously unobserved s-channel resonances. Preliminary polarization results are presented.
- 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:
- 990277
- Report Number(s):
- JLAB-PHY-09-1104; DOE/OR/23177-1335; TRN: US1007275
- Journal Information:
- AIP Conf.Proc., Vol. 1257, Issue 1; Conference: Hadron 2009: 13th International Conference On Hadron Spectroscopy, 29 Nov - 4 Dec 2009, Tallahassee, Florida
- Country of Publication:
- United States
- Language:
- English
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