From Diphoton GDAs and Photon GPDs to the chiral odd Photon DA
Abstract
The photon is a very interesting object for QCD studies since it has both a pointlike coupling to quarks, which yields a perturbative part of photon's wave function, and a non-perturbative coupling related to the magnetic susceptibility of the QCD vacuum and which builds its chiral-odd twist-2 distribution amplitude. The first feature allows us to compute the photon anomalous generalized parton distributions (GPD) and the diphoton generalized distribution amplitudes. The second feature allows us to use a transverse spin asymmetry to probe the chiral odd distribution amplitude of the photon.
Keywords
Cite
@article{arxiv.0907.0352,
title = {From Diphoton GDAs and Photon GPDs to the chiral odd Photon DA},
author = {L. Szymanowski},
journal= {arXiv preprint arXiv:0907.0352},
year = {2009}
}
Comments
6pages, 2 figures, to be published in the proceedings of the international conference onthe structure and the Interactions of the photon, DESY, Hamburg, May 2009