Abstract
We present a study of impact parameter dependent parton distributions (ipdpdfs) using a recent parametrization of u and d quark GPDs H(x,t) and E(x,t) at zero skewness ζ = 0 and discuss the region of validity of the positivity condition which puts limits on the range of x and impact parameter b⊥ used in this parametrization. We also present the GPDs in transverse and longitudinal position space using the same parametrization for non-zero ζ. For GPDs in longitudinal position space in the kinematical region x > ζ, a diffraction pattern is observed, as seen before in several other models.
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