Two Photon Distribution Amplitudes
High Energy Physics - Phenomenology
2008-11-26 v1 Nuclear Theory
Abstract
The factorization of the amplitude of the process gamma* gamma -> gamma gamma in the low energy and high photon virtuality region is demonstrated at the Born order and in the leading logarithmic approximation. The leading order two photon (generalized) distribution amplitudes exhibit a characteristic ln Q2 behaviour and obey new inhomogeneous evolution equations.
Keywords
Cite
@article{arxiv.0806.1375,
title = {Two Photon Distribution Amplitudes},
author = {M. El Beiyad and B. Pire and L. Szymanowski and S. Wallon},
journal= {arXiv preprint arXiv:0806.1375},
year = {2008}
}
Comments
to be published in the proceedings of the workshop HLPW08, Spa, March 6-8, 2008, AIP conference proceedings series