Higher Twist in Electroproduction: Flavor Non-Singlet QCD Evolution
Abstract
We present results for the one loop anomalous dimension matrix of flavor non-singlet twist-4 operators of lowest spin that contribute to the leading moment of the structure function in deep inelastic electron-nucleon scattering. We analyze the flavor structure of the anomalous dimension matrix and decompose the leading moment of into separate flavor channels. In addition to building on previous work with higher-twist operators, these results can provide a benchmark for future work that generalizes to include the higher moments as well. We include non-perturbative input from the lattice and phenomenological estimates of the twist-4 matrix elements and estimate the twist-4 contributions to the leading moment of . The results suggest that the overall twist-4 contribution may be suppressed due to either cancellations among the twist-4 terms or inherently small twist-4 matrix elements.
Cite
@article{arxiv.1208.2998,
title = {Higher Twist in Electroproduction: Flavor Non-Singlet QCD Evolution},
author = {Michael J. Glatzmaier and Sonny Mantry and Michael J. Ramsey-Musolf},
journal= {arXiv preprint arXiv:1208.2998},
year = {2013}
}
Comments
43 pages, 9 figures; Corrected typo in section 12