Bound States in NRQCD/NRQED and the Renormalization Group
High Energy Physics - Phenomenology
2011-01-13 v1
Abstract
The application of renormalization group techniques to bound states in non-relativistic QED and QCD is discussed. For QED bound states like Hydrogen and positronium, the renormalization group allows large logarithms of the velocity, ln v (or equivalently ln alpha's), to be predicted in a universal and simple way. The series of (alpha ln alpha)'s are shown to terminate after a few terms. For QCD one can systematically sum infinite series of the form [alpha_s ln alpha_s]^k$, and answer definitively the question ``alpha_s at what scale?''.
Keywords
Cite
@article{arxiv.hep-ph/0009179,
title = {Bound States in NRQCD/NRQED and the Renormalization Group},
author = {Iain W. Stewart},
journal= {arXiv preprint arXiv:hep-ph/0009179},
year = {2011}
}
Comments
6 pages. Talk presented at the 7th Conference on the Intersections of Particle and Nuclear Physics, Quebec City, Canada, May 2000