Pion polarizabilities: No conflict between dispersion theory and ChPT
High Energy Physics - Phenomenology
2014-11-20 v1 Nuclear Theory
Abstract
Recent attempts to determine the pion polarizability by dispersion relations yield values that disagree with the predictions of chiral perturbation theory. These dispersion relations are based on specific forms for the absorptive part of the Compton amplitudes. The analytic properties of these forms are examined, and the strong enhancement of intermediate-meson contributions is shown to be connected to non-analytic structures
Keywords
Cite
@article{arxiv.0908.4260,
title = {Pion polarizabilities: No conflict between dispersion theory and ChPT},
author = {B. Pasquini and D. Drechsel and S. Scherer},
journal= {arXiv preprint arXiv:0908.4260},
year = {2014}
}
Comments
9 pages, 4 figures; Proceedings of 6th International Workshop on Chiral Dynamics, 6-10 July 2009, Bern, Switzerland