Distribution of valence quarks and light-cone QCD sum rules
High Energy Physics - Phenomenology
2016-08-24 v5
Abstract
A method for calculating the pion structure function directly in terms of light-cone wave functions is suggested. Taking twist-2 and twist-4 pion light-cone wave functions into account, it is shown that the QCD sum rule prediction is in agreement with quark distribution obtained from analysis of the Drell-Yan process. Twist-4 quark-gluon light-cone wave functions give a large positive contribution to the pion structure function for x_B<0.2. A new constraint on the twist-2 pion light-cone wave function is obtained. We argue that the leading twist pion wave function \phi_\pi(u) \simeq 1 for u=0.3 with an accuracy of about 20-30%.
Keywords
Cite
@article{arxiv.hep-ph/9702207,
title = {Distribution of valence quarks and light-cone QCD sum rules},
author = {V. M. Belyaev and Mikkel B. Johnson},
journal= {arXiv preprint arXiv:hep-ph/9702207},
year = {2016}
}
Comments
18 pages, Latex, epsfig, 2 figures