[d2n-analysis-talk] Abstract for APS April meeting

[Diana Parno]

Hello all,

The abstract deadline for the APS April meeting is tomorrow. I am  
hoping to present the preliminary A_1^{^3He} results that will have  
gone into my dissertation and defense by then. I'd appreciate any  
feedback you might have on my abstract, which I've included in text  
and in .pdf:

Preliminary Measurement of Longitudinal Spin Asymmetry $A_1^{^3He}$
Diana Parno for the Jefferson Lab E06-014 Collaboration

Recent measurements of the nucleon-virtual photon longitudinal spin  
asymmetry $A_1$ for the proton and neutron have called into question  
the perturbative QCD prediction that the ratio of polarized-to- 
unpolarized down-quark PDFs, $\Delta d/d$, approaches 1 at large $x$.  
As part of Experiment E06-014 in Hall A of Jefferson Lab, double-spin  
asymmetries were measured in the scattering of a polarized electron  
beam from a polarized $^3$He target in the deep inelastic scattering  
region, allowing the eventual extraction of the neutron asymmetry  
$A_1^n$. We will discuss our analysis of data with beam energies of  
5.9 and 4.7 GeV and present preliminary results for the nuclear  
asymmetry $A_1^{^3He}$ as measured with 4.7-GeV electrons for $0.2 < x  
< 0.65$ and $2$ GeV$^2 < Q^2 < 5$ GeV$^2$. Once corrections for  
nuclear effects have been completed, the resulting measurements of  
$A_1^n$ will provide a test of previous results in advance of two  
upcoming experiments at Jefferson Lab.

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Best,
Diana