Leading Chiral Corrections to the Nucleon Generalized Parton   Distributions
  Using heavy baryon chiral perturbation theory we study the leading chiral corrections to the complete set of nucleon generalized parton distributions (GPDs). We compute the leading quark mass and momentum transfer dependence of the moments of nucleon GPDs through the nucleon off-forward twist-2 matrix elements. These results are then applied to get insight on the GPDs and their impact parameter space distributions. 
Shung-ichi Ando, Jiunn-Wei Chen, and Chung-Wen Kao