[Sane-analysis] Abstract for SPIN 2012

Hovannes Baghdasaryan bhovik at jlab.org
Fri Jun 29 10:20:36 EDT 2012


Dear Collaborators,
I would like to go to SPIN 2012 in Dubna. Here is my apstract for the 
conference. Please Make coments.

  The Spin Asymmetries of the Nucleon Experiment (SANE) is a measurement 
the of parallel, $A_\para$, and near-perpendicular, $A_{80}$, double spin
  asymmetries in inclusive polarized electron scattering
  on a polarized proton.  The experiment was performed in Hall-C at the 
Thomas Jefferson Lab National Accelerator Facility.The scattered electrons 
were detected
  using the Big Electron Telescope Array, BETA, which was
  centered at 40$^\circ$ and covered a large solid angle.
  The data was taken at the Thomas at two beam energies of
  $4.7$ and $5.9~GeV$ and covered $2.5~GeV^2 < Q^2 < 6.5~GeV^2$.
  The proton's spin asymmetries, $A_1$ and $A_2$, and the spin
  structure functions of the proton,  $g_1$ and $g_2$, are extracted from 
the measured $A_\para$ and $A_{80}$.
  The measurements are in a range of Bjorken $x$, $0.3 < x < 0.8$, where
  extraction of the twist three matrix element $d_2^p $ (an integral of
  $g_1$ and $g_2$ weighted by $x^2$) is most sensitive.

with best regards Hovhannes


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