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Kinematical twist-3 effects in DVCS as a quark spin rotation | A.V. Radyushkin
; C. Weiss
; | Date: |
5 Jun 2001 | Journal: | Phys.Rev. D64 (2001) 097504 | Subject: | hep-ph | Abstract: | 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. | Source: | arXiv, hep-ph/0106059 | Services: | Forum | Review | PDF | Favorites |
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