Preliminary results for the helicity asymmetry E for η photoproduction on the proton

• DOI: 10.1063/1.3701263
• Publication Date: 2012-04-19T07:48:41Z
• Authors: B. T. Morrison; M. Dugger; B. G. Ritchie; CLAS Collaboration
• Keywords: Helicity

Polarization observables are an important tool for clarifying the nucleon resonance spectrum. No previous measurements double polarization asymmetries have been published η photoproduction. Double made at Jefferson Lab using a polarized photon beam and protons in frozen spin target (FROST). Data were taken during first running period of FROST CLAS detector with energies from 0.33 to 2.35 GeV. Preliminary results E observable eta meson photoproduction proton threshold above, along comparisons several theoretical predictions presented.