publication . Article . Preprint . 1999

Representation of the virtual Compton amplitude for polarized scattering in the generalized Bjorken region

Dieter Robaschik; Bodo Geyer; Johannes Blümlein;
Open Access
  • Published: 10 May 1999 Journal: Nuclear Physics B - Proceedings Supplements, volume 79, pages 564-566 (issn: 0920-5632, Copyright policy)
  • Publisher: Elsevier BV
Abstract
The Compton amplitude is calculated in terms of expectation values of light-ray quark operators. As a technical tool we apply the nonlocal light-cone expansion. Thereby we express the expectation value of the vector light-ray operator with the help of the expectation value of the corresponding scalar operator of twist 2. This allows important simplifications. In the limit of forward scattering the integral relations between the twist-2 contributions of the structure functions are implied directly.
Subjects
free text keywords: Nuclear and High Energy Physics, Atomic and Molecular Physics, and Optics, High Energy Physics - Phenomenology, Quantum electrodynamics, Scalar (physics), Operator (computer programming), Expectation value, Twist, Scattering, Quark, Amplitude, Vacuum expectation value, Physics
Related Organizations

1. J. Blu¨mlein, B. Geyer, D. Robaschik, Phys. Lett. B 406 (1997) 161 and Erratum; DESY 99-020, hep-ph/9903520.

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