be incorporated in a straightforward way in our approach.

Evolution of twist-2 conformal moments at LO.
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In the past [@muel88] and more recently [@ji97; @rad96; @RadPRD56] different authors introduced non-forward distributions, which describe the non-perturbative inputs in certain processes such as DVCS and exclusive electroproduction of mesons. In the consequent discussion we accept the following definition of the non-forward distribution functions [@rad96; @RadPRD56] $$\label{definition}
{^i{\cal O}^{\mit\Gamma}} (\lambda, \mu)
= \langle h' | \phi_i^* (\mu n) {\mit\Gamma}
\Phi \left[ \mu n, \lambda n \right]
\phi_i (\lambda n) |h \rangle
= \int d x e^{ i \mu (x - \zeta) - i \lambda x }\
{^i{\cal O}^{\mit\Gamma}} (x, \zeta),$$ in terms of the light-cone Fourier transformation. Here $i = Q,G$ runs over the parton species, ${\mit\Gamma}$ corresponds to different Dirac or Lorentz structures, depending on the spin of the constituents involved and $\Phi$ is a path ordered exponential. The momentum fractions of incoming $x$ and outgoing $x - \zeta$ partons are the Fourier conjugated variables of the light-cone positions $\lambda$ and $\mu$. Parameter $\zeta$ is a skewedness of the distribution defined as a $+$-component of the $t$-channel momentum $\Delta_+ =
\zeta$ (see next section for discussion of the kinematics of the 