Off-diagonal distributions fixed by diagonal partons at small $x$ and $\xi$

Abstract

We show that the off-diagonal (or skewed) parton distributions are completely determined at small $x$ and $\xi$ by the (conventional) diagonal partons. We present predictions which can be used to estimate the off-diagonal distributions at small $x$ and $\xi$ at any scale.

Comments: 16 pages, latex, 4 ps figures