Diphoton Generalized Distribution Amplitudes
High Energy Physics - Phenomenology
2008-11-26 v1 Nuclear Theory
Abstract
We calculate the leading order diphoton generalized distribution amplitude by calculating the amplitude of the process gamma* gamma -> gamma gamma in the low energy and high photon virtuality region at the Born order and in the leading logarithmic approximation. As in the case of the anomalous photon structure functions, the gamma gamma generalized distribution amplitude exhibits a characteristic \ln Q^2 behaviour and obeys inhomogeneous evolution equations.
Keywords
Cite
@article{arxiv.0806.1098,
title = {Diphoton Generalized Distribution Amplitudes},
author = {M. El Beiyad and B. Pire and L. Szymanowski and S. Wallon},
journal= {arXiv preprint arXiv:0806.1098},
year = {2008}
}
Comments
15 pages, 5 figures