The evolution of the nonsinglet twist-3 parton distribution function

B. Geyer; D. Müller; D. Robaschik

The evolution of the nonsinglet twist-3 parton distribution function

High Energy Physics - Phenomenology 2007-05-23 v1

Authors: B. Geyer , D. Müller , D. Robaschik

Abstract

The twist three contributions to the $Q^2$ -evolution of the spin-dependent structure function $g_2(x_{Bj},Q^2)$ are considered in the non-local operator product approach. Defining appropriate twist three distribution function we derive their evolution equation for the nonsinglet case in leading order approximation. In the limit $x_{Bj} \rightarrow 1$ as well as in the large $N_c$ limit we confirm the result that the evolution of the nonsinglet part of $g_2$ is governed by a Gribov-Lipatov-Altarelli-Parisi equation.

Keywords

perturbative qcd evolution

Cite

@article{arxiv.hep-ph/9611452,
  title  = {The evolution of the nonsinglet twist-3 parton distribution function},
  author = {B. Geyer and D. Müller and D. Robaschik},
  journal= {arXiv preprint arXiv:hep-ph/9611452},
  year   = {2007}
}

Comments

8 pages Latex An earlier version of this paper has been presented at the `3rd Meeting on the Prospects of Nucleon-Nucleon Spin Physics at HERA', JINR Dubna, 28-29 June 1996

The evolution of the nonsinglet twist-3 parton distribution function

Abstract

Keywords

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