Measurement of the induced Λ0(1116) polarization in K+ electroproduction at CLAS

Marianna Y Gabrielyan, B. Raue, D. S. Carman, K. Park

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

We are using the p(e, e′ K+p)π- reaction to perform a measurement of the induced polarization of the electroproduced L(1116) using its pπ- 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 ≤ Q2 ≤ 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.

Original languageEnglish (US)
Title of host publication8th International Workshop on the Physics of Excited Nucleons, NSTAR 2011
Pages375-378
Number of pages4
DOIs
StatePublished - Dec 1 2012
Event8th International Workshop on the Physics of Excited Nucleons, NSTAR 2011 - Newport News, VA, United States
Duration: May 17 2011May 20 2011

Publication series

NameAIP Conference Proceedings
Volume1432
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

Other8th International Workshop on the Physics of Excited Nucleons, NSTAR 2011
CountryUnited States
CityNewport News, VA
Period5/17/115/20/11

Keywords

  • Electroproduction
  • Hyperon
  • Kaon
  • Polarization

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