Interaction of small size wave packet with hadron target
  We calculate in QCD the cross section for the scattering of an energetic small-size wave packet off a hadron target. We use our results to study the small-$\sigma$ behaviour of $P_{\pi}(\sigma)$, the distribution over cross section for the pion, in the leading $\alpha_{s}$-order. 
L. Frankfurt, A.V.Radyushkin and M. Strikman