Pion form factor from a contact interaction
Nuclear Theory
2010-11-11 v1 High Energy Physics - Lattice
High Energy Physics - Phenomenology
Nuclear Experiment
Abstract
In a Poincare'-covariant vector-boson-exchange theory, the pion possesses components of pseudovector origin, which materially influence its observable properties. For a range of such quantities, we explore the consequences of a momentum-independent interaction, regularised in a symmetry-preserving manner. The contact interaction, whilst capable of describing pion static properties, produces a form factor whose: evolution for Q^2>0.17GeV^2 disagrees markedly with experiment; and asymptotic power-law behaviour conflicts strongly with perturbative-QCD.
Cite
@article{arxiv.1002.1968,
title = {Pion form factor from a contact interaction},
author = {L. X. Gutierrez-Guerrero and A. Bashir and I. C. Cloet and C. D. Roberts},
journal= {arXiv preprint arXiv:1002.1968},
year = {2010}
}
Comments
5 pages