Charged Pion Polarizabilities to two Loops
High Energy Physics - Phenomenology
2011-07-19 v1
Abstract
We evaluate the electric and magnetic polarizabilities of charged pions in the framework of chiral perturbation theory at next-to-leading order. This requires a two-loop evaluation of the Compton amplitude near threshold. We estimate the two new low-energy constants which enter the chiral expansion at this order with resonance saturation. The numerical results are compared with presently available experimental information.
Cite
@article{arxiv.hep-ph/9602421,
title = {Charged Pion Polarizabilities to two Loops},
author = {Urs Buergi},
journal= {arXiv preprint arXiv:hep-ph/9602421},
year = {2011}
}
Comments
9 pages, LaTeX, uses epsf.sty and cite.sty, one postscript picture included