Measurement of the induced Lambda^0(1116) polarization in K^+ electroproduction at CLAS

Conference · Sun Apr 01 04:00:00 EDT 2012 · AIP Conf. Proc.

DOI:https://doi.org/10.1063/1.3701252· OSTI ID:1038741

We are using the p(e,e'K{sup +}p){pi}{sup -} reaction to perform a measurement of the induced polarization of the electroproduced L(1116) using its p{pi}{sup -} parity-violating weak decay. This study uses the CEBAF Large Acceptance Spectrometer (CLAS) to detect the scattered electron, the kaon, and the decay proton over the kinematics 0.8 {le} Q{sup 2} {le} 3.5 GeV{sup 2}, 1.6 {le} W {le} 3.0 GeV, and the full kaon CM angle range. In this experiment a 5.5 GeV electron beam was incident upon an unpolarized liquid-hydrogen target. The goal is to map out the kinematic dependencies for this polarization observable to provide new constraints for models of the electromagnetic production of K-hyperon final states. Along with previously published photo- and electroproduction cross sections and polarization observables from CLAS, SAPHIR, LEPS, and GRAAL, these data are needed in a coupled-channel analysis to identify previously unobserved s-channel resonances. Preliminary polarization results will be presented.

• Research Organization: Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: AC05-06OR23177
• OSTI ID: 1038741
• Report Number(s): JLAB-PHY-11-1503; DOE/OR/23177-2070
• Conference Information: Journal Name: AIP Conf. Proc. Journal Volume: 1432
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CROSS SECTIONS
DECAY
ELECTRON BEAMS
ELECTROPRODUCTION
KAONS
POLARIZATION
PRODUCTION
PROTONS
S CHANNEL
SPECTROMETERS