Narrow Resonances in Effective Field Theory
Nuclear Theory
2009-11-10 v1 High Energy Physics - Phenomenology
Abstract
We discuss the power counting for effective field theories with narrow resonances near a two-body threshold. Close to threshold, the effective field theory is perturbative and only one combination of coupling constants is fine-tuned. In the vicinity of the resonance, a second, ``kinematic'' fine-tuning requires a nonperturbative resummation. We illustrate our results in the case of nucleon-alpha scattering.
Cite
@article{arxiv.nucl-th/0304007,
title = {Narrow Resonances in Effective Field Theory},
author = {P. F. Bedaque and H. -W. Hammer and U. van Kolck},
journal= {arXiv preprint arXiv:nucl-th/0304007},
year = {2009}
}
Comments
11 pages, revtex4, 3 ps figures