[Clas_hadron] Revised DNP abstract for Brian Morrison

[Brian Morrison]

Hey all,

After all the discussion over the last day I've tried to incorporate all
of the feedback into a new abstract which can be found below.  Please let
me know if anything is still in error or if there are more changes that
should be made.

-Brian



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, there are no published data
for eta double polarization asymmetries.  A program of double polarization
experiments has been conducted at Jefferson Lab using a tagged polarized
photon beam and a frozen spin polarized target (FROST).  The results to be
presented were taken during the first running period of FROST using the
CLAS detector at Jefferson Lab with photon energies ranging from 329 to
2,350 MeV.  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.