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MEASUREMENT OF THE INDUCED Lambda(0)(1116) POLARIZATION IN K+ ELECTROPRODUCTION at CLAS

Author:
Gabrielyan, M.  Raue, B.  Carman, D. S.  Park, K.  


Journal:
8TH INTERNATIONAL WORKSHOP ON THE PHYSICS OF EXCITED NUCLEONS (NSTAR 2011)


Issue Date:
2012


Abstract(summary):

We are using the p(e, e' K+ p)pi(-) reaction to perform a measurement of the induced polarization of the electroproduced L (1116) using its p pi(-) 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 <= Q(2) <= 3.5 GeV2, 1.6 <= W <= 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.


Page:
375---378


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