[Sane-analysis] PANIC Abstract update

[Whitney R. Armstrong]

Thank you everyone for your very helpful comments and suggestions.

Here is the final version.

The Spin Asymmetries of the Nucleon Experiment (SANE) measured the virtual
Compton scattering asymmetries, $A_1$ and $A_2$, which determine the spin
structure functions of the proton,  $g_1$ and $g_2$. The kinematics for
these 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. The quantity, $d_2$, is a
measure of the average restoring Lorentz color force experienced by a quark
inside a polarized nucleon after it is struck by a virtual photon in
electron Deep Inelastic Scattering (DIS). The data was taken at the Thomas
Jefferson Lab National Accelerator Facility's Hall C, using beam energies of
$4.7$ and $5.9~GeV$, probing the nucleon at scales from $Q^2$ equal to
$2.5~GeV^2$ up to $6.5~GeV^2$. In this polarized electron scattering off a
polarized proton target experiment, two inclusive double spin asymmetries,
$A_\parallel$ and $A_\perp$ were measured using the BETA (Big Electron
Telescope Array) Detector. BETA is a device without magnetic momentum
dispersion that consists of a scintillator hodoscope, gas Cherenkov, lucite
hodoscope and a large array of lead glass detectors. We will discuss the
analysis of the BETA data in addition to the motivating physics of the
proton's spin structure.

On Mon, Feb 28, 2011 at 2:54 PM, Zein-Eddine Meziani <meziani at temple.edu>wrote:

> Hi Whit,
>
> I suggest adding an explanation of what d2 is. See my add-on comments.
>
> Z.-E.
> On Feb 28, 2011, at 11:28 AM, Whitney R. Armstrong wrote:
>
> Here is an updated version.
>
> http://quarks.temple.edu/~whit/SANE/talks/WArmstrong_PANIC2011.pdf
>
>
>
> The Spin Asymmetries of the Nucleon Experiment (SANE)  measured the virtual
> Compton scattering asymmetries, $A_1$ and $A_2$, which determine the spin
> structure functions of the proton,  $g_1$ and $g_2$. The kinematics for
> these 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.
>
>
> The quantity $d_2$, is a measure of the average restoring Lorentz color
> force experienced by a quark inside a polarized nucleon  after it is struck
> by a virtual photon in electron Deep Inelastic Scattering (DIS).
>
> The data was taken from $Q^2$ equal to $2.5 GeV^2$ up to $6.5 GeV^2$. In
> this polarized electron scattering  off a polarized proton target
> experiment, two double spin asymmetries, $A_\parallel$ and $A_\perp$ were
> measured using the BETA (Big Electron Telescope Array) Detector. BETA
> consists of a scintillator hodoscope, gas Cherenkov, lucite hodoscope and a
> large array of lead glass detectors. We will discuss the analysis of BETA
> data in addition to the motivating physics of the proton's spin structure.
>
> _______________________________________________
> Sane-analysis mailing list
> Sane-analysis at jlab.org
> https://mailman.jlab.org/mailman/listinfo/sane-analysis
>
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: https://mailman.jlab.org/pipermail/sane-analysis/attachments/20110228/3ac6d2ed/attachment.html