[Sane-analysis] Abstract for Graduate Research Symposium at William & Marry.

[anusha at jlab.org]

HI all,
Here is my abstract I am going to submit for the Graduate Research
Symposium at William & Marry.
So, could you please let me know if something needs to be change.

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Measurement of the Proton Electric to Magnetic Form Factor Ratio with
Polarized Beam and Target

Experiment E07-003 (SANE, Spin Asymmetries of the Nucleon Experiment) has
been carried out in Hall C at Jefferson Lab in 2009 to study the proton
spin structure functions with a dynamically polarized ammonia target and
longitudinally polarized electron beam. By detecting inclusively scattered
electrons from the polarized ammonia target in the High Momentum
spectrometer (HMS), elastic measurements were carried out in
parallel. The elastic double spin asymmetry allows to extract the proton
electric to magnetic form factor ratio $G_E/G_M$ at $Q^2$ = 2.2(GeV/c)$^2$.
       In addition to the inclusive data, recoil protons were detected in
HMS with electrons registered in BETA to reach high Q2. These coincidence
data allow to measure the beam-target asymmetry for elastic kinematics
with the target spin nearly perpendicular to the momentum transfer, and
to extract $G_E/G_M$ at $Q^2$ = 5.25 (GeV/c)$^2$ and $Q^2$ = 6.25
(GeV/c)$^2$.
       The measurement of $G_E/G_M$ with polarized target allows to verify
the dramatic discrepancy at high $Q^2$ between the Rosenbluth and the
recoil polarization transfer method with a different measurement technique
and systematic uncertainties uncorrelated to those of the recoil
polarization measurements. The current status of the analysis and some
preliminary results  will be presented.

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Thanks and Best Regards
Anusha