Evolution of Structure Functions And Their Moments In Chiral Field Theory

Details Evolution of Structure Functions And Their Moments In Chiral Field Theory Evolution of Structure Functions And Their Moments In Chiral Field Theory

2002-01-09

arxiv.org/abs/hep-ph/0201058v1

Int.J.Mod.Phys. A18 (2003) 593-606

Physics

High Energy Physics

High Energy Physics - Phenomenology

18 pages, LaTex, 5 figures

Scientific paper

10.1142/S0217751X03014009

Evolution of structure functions and their moments at low and moderate $Q^2$ is studied in the chiral field theory. Evolution equations based on perturbation expansion in the coupling constant of the effective theory are derived and solved for the moments. The kernels of evolution arising from different processes have been calculated with contributions from direct and cross channels, the interference terms being non-negligible in the kinematic regions under consideration. This is shown to lead to flavor-dependence of the kernels which manifests in observable effects. The invalidity of the probabilistic approach to the evolution process is also pointed out.

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