1306.4178 (I. V. Anikin et al.)

Space-time structure of polynomiality for GPDs    [PDF]

I. V. Anikin, I. O. Cherednikov

We study the space-time structure of polynomiality---one of most important properties which is inherent to the generalized parton distributions (GPDs). In this connection, we re-examine the issue of the time- and normal- ordering in the operator definition of GPDs. We demonstrate that the contribution of the anti-commutator matrix element in the totally collinear kinematics, which was previously argued to vanish, has to be added in order to satisfy the polynomiality condition.

View original: http://arxiv.org/abs/1306.4178