### Session B12: Invited Session: Longitudinal and Transverse Structure of the Nucleon

10:45 AM–12:33 PM, Saturday, March 31, 2012
Room: Grand Hall East A/B

Chair: Wally Melnitchouk, Thomas Jefferson National Accelerator Facility

Abstract ID: BAPS.2012.APR.B12.2

### Abstract: B12.00002 : Spin Structure Functions of the Proton - SANE experiment

11:21 AM–11:57 AM

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#### Author:

Hovhannes Baghdasaryan
(University of Virginia)

The Spin Asymmetries of the Nucleon Experiment (SANE) is a measurement of inclusive electron scattering parallel and near perpendicular double spin asymmetries from a proton target. The main goal of the experiment was to measure $A_\parallel$ and $A_{80}$ and to extract the spin asymmetries of the proton $A_1^p,$ $A_2^p$ and the spin structure functions $g_1^p$ and $g_2^p$. Using the Thomas Jefferson National Accelerator Facility's polarized electron beam and the University of Virginia's polarized frozen ammonia ($^{14}$NH$_3$) target in Hall C, the experiment ran in 2009, collecting data in a Q$^2$ region from 2.5 to 6.5 GeV$^2$ and between Bjorken $x$ of 0.3 and 0.8. Particle detection was accomplished using the Big Electron Telescope Array (BETA), a novel non-magnetic detector. The physics motivation for the experiment and a brief overview of the polarized target and the detector will be presented along with the analysis developed in order to extract the proton spin asymmetries and structure functions. Results will be presented.

To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2012.APR.B12.2