We perform a QCD analysis of exclusive two-meson production in gamma* gamma collisions in the kinematical domain of large photon virtuality Q^2 and small hadronic invariant mass W^2. In these kinematics the amplitude factorizes into a perturbative subprocess gamma* gamma -> q qbar and a two-meson distribution amplitude. This opens the way to study new hadronic matrix elements related with the physics of hadronization and confinement.
@article{arxiv.hep-ph/9907453,
title = {Exclusive hadronization in gamma* gamma -> pi pi},
author = {M. Diehl and T. Gousset and B. Pire},
journal= {arXiv preprint arXiv:hep-ph/9907453},
year = {2008}
}
Comments
5 pages, 1 figure. Talk given at PHOTON 99, Freiburg, Germany, 23-27 May 1999. Eq. (8) corrected