Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2000-11-25
Phys.Rev. D64 (2001) 116002
Physics
High Energy Physics
High Energy Physics - Phenomenology
21 pages, LaTeX, 2 figures, text clarifications, an equation, a note and references added
Scientific paper
10.1103/PhysRevD.64.116002
We study twist-three effects in spin, charge, and azimuthal asymmetries in deeply virtual Compton scattering on a spin-zero target. Contributions which are power suppressed in 1/Q generate a new azimuthal angle dependence of the cross section which is not present in the leading twist results. On the other hand the leading twist terms are not modified by the twist three contributions. They may get corrected at twist four level. In the Wandzura-Wilczek approximation these new terms in the Fourier expansion with respect to the azimuthal angle are entirely determined by the twist-two skewed parton distributions. We also discuss more general issues like the general form of the angular dependence of the differential cross section, validity of factorization at twist-three level, and a relation of skewed parton distributions to spectral functions.
Belitsky Andrei V.
Kirchner Alois
Muller Daniel
Sch{ä}fer Andreas
No associations
LandOfFree
Twist-three analysis of photon electroproduction with pion 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 Twist-three analysis of photon electroproduction with pion, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Twist-three analysis of photon electroproduction with pion will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-61106