[Frost] Brian's abstract for the october DNP meeting

[Brian Morrison]

Abstract:
Measurements of the helicity asymmetry E for eta meson photoproduction on
the proton

Brian Morrison, Arizona State University* for the CLAS collaboration.

The nucleon resonance spectrum consists of many overlapping excitations. 
Polarization observables are an important tool for understanding and
clarifying these spectra.  While there is a large data base of
differential cross sections for the process, very few data exist for
polarization observables.  A program of double polarization experiments
has been conducted at Jefferson Lab using a polarized photon beam and a
polarized frozen spin target (FroST).  The results presented here were
taken during the first running period of FroST using the CLAS detector at
Jefferson Lab with photon energies ranging from 329 MeV to 2.35 GeV.  We
present data for the E polarization observable for eta meson
photoproduction at threshold and above, along with comparisons to several
theoretical predictions.

*Work at ASU is supported by the U.S. National Science Foundation.


Let me know if there is anything that might need to be changed, I will be
submitting this either thursday night or friday morning.

-Brian