Measurements of the Proton and Deuteron Spin Structure Function g2 and Asymmetry A2
High Energy Physics - Experiment
2008-11-26 v3
Abstract
We have measured proton and deuteron virtual photon-nucleon asymmetries A2p and A2d and structure functions g2p and g2d over the range 0.03<x<0.8 and 1.3<Q2<10 (GeV/c)2 by inelastically scattering polarized electrons off polarized ammonia targets. Results for A2 are significantly smaller than the positivity limit sqrt(R) for both targets. Within experimental precision, the g2 data are well-described by the twist-2 contribution g2WW. Twist-3 matrix elements have been extracted and are compared to theorectical predictions.
Keywords
Cite
@article{arxiv.hep-ex/9511013,
title = {Measurements of the Proton and Deuteron Spin Structure Function g2 and Asymmetry A2},
author = {The E143 Collaboration and K. Abe et al},
journal= {arXiv preprint arXiv:hep-ex/9511013},
year = {2008}
}
Comments
11 pages, format is postscript file, gzip-ed, uuencode-ed