Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2000-07-27
Phys.Lett. B497 (2001) 73-79
Physics
High Energy Physics
High Energy Physics - Phenomenology
9 pages, no figures (To appear in Phys. Lett. B)
Scientific paper
10.1016/S0370-2693(00)01313-7
We present a derivation of Wandzura-Wilczek (WW) like relations for skewed parton distributions. It is demonstrated for photon-pion scattering that the skewed twist-3 parton distributions contributing to the DVCS amplitude have discontinuities at the points $x=\pm\xi$ in the WW approximation. This may lead to a violation of factorisation for the twist-3 DVCS amplitude with transverse polarization of the virtual photon. We show, however, that the contribution of the divergencies to the scattering of a transversely polarized virtual photon affects DVCS observables only at order $1/Q^2$ and can be neglected at twist-3 accuracy. For the scattering of a longitudinally polarized photon the twist-3 amplitude is free of such divergencies.
Kivel Nikolai
Polyakov Maxim V.
Sch{ä}fer Andreas
Teryaev Oleg V.
No associations
LandOfFree
Wandzura-Wilczek approximation for the twist-3 DVCS amplitude does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Wandzura-Wilczek approximation for the twist-3 DVCS amplitude, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Wandzura-Wilczek approximation for the twist-3 DVCS amplitude will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-719718