NNLO Calculation of Two-Nucleon Scattering in EFT for a Two Yukawa Toy Model
Abstract
The effective field theory (EFT) for a toy model of nucleons interacting via a short range and a long range Yukawa potential is presented. The scattering amplitude in the 1S0 channel is calculated up to NNLO using KSW power counting scheme. A particular expansion of the amplitude about the pole at low (imaginary) momentum is used to derive matching conditions for the EFT couplings. In addition, after imposing constraints from a Renormalization Group analysis, there are no new free parameters in the amplitude at NNLO. Comparing the NNLO phase shifts to the full model we show that the EFT expansion is converging.
Keywords
Cite
@article{arxiv.nucl-th/9902077,
title = {NNLO Calculation of Two-Nucleon Scattering in EFT for a Two Yukawa Toy Model},
author = {Gautam Rupak and Noam Shoresh},
journal= {arXiv preprint arXiv:nucl-th/9902077},
year = {2009}
}
Comments
24 pages, 11 EPS figures, revtex; typos in formulae corrected; More typos corrected, expressions in appendix added, minor changes in style, graph Fig3(b) replaced