English

Higher Twist in Electroproduction: Flavor Non-Singlet QCD Evolution

High Energy Physics - Phenomenology 2013-08-22 v2 Nuclear Theory

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 F2F_2 structure function in deep inelastic electron-nucleon scattering. We analyze the flavor structure of the anomalous dimension matrix and decompose the leading moment of F2F_2 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 F2F_2. 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

R2 v1 2026-06-21T21:50:43.821Z