Induced polarization of Λ(1116) in kaon electroproduction with CLAS

Marianna Gabrielyan, Brian Raue, Daniel S. Carman, Kijun Park

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

Abstract

The CLAS Collaboration is using the p(e,e′K+p)π - reaction to perform a measurement of the induced polarization of the electroproduced Λ(1116). The parity-violating weak decay of the Λ into p&pgr- (64%) allows extraction of the recoil polarization of the Λ. This study uses the CEBAF Large Acceptance Spectrometer (CLAS) to detect the scattered electron, the kaon, and the decay proton. CLAS allows for a large kinematic acceptance with 0.8 ≤ Q2 ≤ 3.5 GeV2, 1.6 ≤ W ≤ 3.0 GeV, as well as the kaon scattering angle. 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 theoretical models of the electromagnetic production of kaon-hyperon final states. Along with previously published photo- and electro-production cross sections and polarization observables from CLAS, SAPHIR, and GRAAL, these data are needed in a coupled-channel analysis to identify previously unobserved s-channel resonances.

Original languageEnglish (US)
Title of host publication11th Conference on the Intersections of Particle and Nuclear Physics, CIPANP 2012
Pages410-412
Number of pages3
DOIs
StatePublished - Dec 16 2013
Event11th Conference on the Intersections of Particle and Nuclear Physics, CIPANP 2012 - St. Petersburg, FL, United States
Duration: May 29 2012Jun 3 2012

Publication series

NameAIP Conference Proceedings
Volume1560
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

Other11th Conference on the Intersections of Particle and Nuclear Physics, CIPANP 2012
CountryUnited States
CitySt. Petersburg, FL
Period5/29/126/3/12

Keywords

  • electroproduction
  • hyperon
  • kaon
  • polarization

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