Exclusive electroproduction of pion pairs
High Energy Physics - Phenomenology
2008-11-26 v1
Abstract
We investigate electroproduction of pion pairs on the nucleon in the framework of QCD factorization for hard exclusive processes. We extend previous analyses by taking the hard-scattering coefficients at next-to-leading order in . The dynamics of the produced pion pair is described by two-pion distribution amplitudes, for which we perform a detailed theoretical and phenomenological analysis. In particular, we obtain constraints on these quantities by comparing our results with measurements of angular observables that are sensitive to the interference between two-pion production in the isoscalar and isovector channels.
Keywords
Cite
@article{arxiv.hep-ph/0703148,
title = {Exclusive electroproduction of pion pairs},
author = {N. Warkentin and M. Diehl and D. Yu. Ivanov and A. Schafer},
journal= {arXiv preprint arXiv:hep-ph/0703148},
year = {2008}
}