Determination of the effective strong coupling constant alpha_{s,g_1}(Q^2) from CLAS spin structure function data
High Energy Physics - Phenomenology
2008-11-26 v2
Abstract
We present a new extraction of the effective strong coupling constant \alpha_{s,g_1}(Q^2). The result agrees with a previous determination and extends the measurement of the low and high Q^2 behavior of \alpha_{s,g_1}(Q^2) that was previously deduced from sum rules. In particular, it experimentally verifies the lack of Q^2-dependence of \alpha_{s,g_1}(Q^2) in the low Q^2 limit. This fact is necessary for application of the AdS/CFT correspondence to QCD calculations. We provide a parameterization of \alpha_{s,g_1}(Q^2) thatcan equivalently be used to parameterize the Q^2-dependence of the generalized Gerasimov-Drell-Hearn and Bjorken sums.
Cite
@article{arxiv.0803.4119,
title = {Determination of the effective strong coupling constant alpha_{s,g_1}(Q^2) from CLAS spin structure function data},
author = {A. Deur and V. Burkert and J. P. Chen and W. Korsch},
journal= {arXiv preprint arXiv:0803.4119},
year = {2008}
}
Comments
Updated to the version published in PLB (minor modifications)