Infrared regularization in relativistic chiral perturbation theory
Date
2008-08-14T16:54:39Z
Authors
Bird, Christopher Shane
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
Chiral perturbation theory is a useful tool in the study of low energy reactions involving light particles. However the inclusion of heavy particles in chiral perturbation theory results in large contributions from loop diagrams which violate the standard power counting scheme. We review two methods, referred to as heavy baryon chiral perturbation theory and infrared regularization, which remove the high energy effects of the heavy particles and which therefore do not violate the power counting scheme. We then use these two methods to calculate the amplitude for pion photoproduction to fourth order and prove that the two amplitudes are equivalent.
Description
Keywords
chiral perturbation theory, quantum dynamics, light particles, pion photoproduction