[Sane-analysis] DNP abstract

[Mark Jones]

Here is the abstract for DNP 2012. It is due July 2nd.


The Spin Asymmetries of the Nucleon Experiment (SANE) measured the 
parallel, $A_\para$, and near-perpendicular, $A_{80}$, double spin 
asymmetries in inclusive polarized electron scattering
on a polarized proton.  The scattered electrons  were detected
using the Big Electron Telescope Array, BETA, which was
centered at 40$^\circ$ and covered a large solid angle.
BETA consisted of a scintillator hodoscope, gas Cherenkov, lucite
hodoscope and a large array of lead glass detectors.
The data was taken at the Thomas
Jefferson Lab National Accelerator Facility's Hall C at beam energies of
$4.7$ and $5.9~GeV$ and covered $2.5~GeV^2 < Q^2 < 6.5~GeV^2$.
 From the $A_\para$ and $A_{80}$ measurements, the
proton's spin asymmetries, $A_1$ and $A_2$, and the spin
structure functions of the proton,  $g_1$ and $g_2$, can be extracted. 
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.

                     Cheers,
                            Mark