Kinematical twist-3 effects in DVCS as a quark spin rotation

Details Kinematical twist-3 effects in DVCS as a quark spin rotation Kinematical twist-3 effects in DVCS as a quark spin rotation

2001-06-05

arxiv.org/abs/hep-ph/0106059v1

Phys.Rev. D64 (2001) 097504

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, revtex, 3 eps figures included using epsf

Scientific paper

10.1103/PhysRevD.64.097504

We point out that the kinematical twist-3 contributions to the DVCS amplitude, required to restore electromagnetic gauge invariance of the twist-2 amplitude up to O(t/q^2), can be understood as a spin rotation applied to the twist-2 quark density matrix in the target. This allows for a compact representation of the twist-3 effects, as well as for a simple physical interpretation.

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