Implication of the overlap representation for modelling generalized parton distributions
Abstract
Based on a field theoretically inspired model of light-cone wave functions, we derive valence-like generalized parton distributions and their double distributions from the wave function overlap in the parton number conserved s-channel. The parton number changing contributions in the t-channel are restored from duality. In our construction constraints of positivity and polynomiality are simultaneously satisfied and it also implies a model dependent relation between generalized parton distributions and transverse momentum dependent parton distribution functions. The model predicts that the t-behavior of resulting hadronic amplitudes depends on the Bjorken variable x_Bj. We also propose an improved ansatz for double distributions that embeds this property.
Cite
@article{arxiv.0710.1567,
title = {Implication of the overlap representation for modelling generalized parton distributions},
author = {D. S. Hwang and D. Mueller},
journal= {arXiv preprint arXiv:0710.1567},
year = {2008}
}
Comments
15 pages, 8 eps figures