The annihilation of virtual photons into pseudoscalar mesons
High Energy Physics - Phenomenology
2011-09-13 v1
Abstract
We investigate the possibility to constrain the pion distribution amplitude from the gamma* gamma* -> pi transition. For a surprisingly large range in the two photon virtualities we find that the transition form factor is essentially independent of the distribution amplitude. This in turn entails a parameter-free prediction of QCD. The gamma* gamma* -> eta, eta' form factors are also briefly discussed. We estimate that experimental studies might be feasible at the existing e+ e- experiments BaBar, Belle, and CLEO.
Cite
@article{arxiv.hep-ph/0108220,
title = {The annihilation of virtual photons into pseudoscalar mesons},
author = {M. Diehl and P. Kroll and C. Vogt},
journal= {arXiv preprint arXiv:hep-ph/0108220},
year = {2011}
}
Comments
22 pages latex, 9 figures