Vector Meson Contributions in epsilon'/epsilon
High Energy Physics - Phenomenology
2014-11-17 v4
Abstract
The CP violating parameter epsilon'/epsilon is computed using the low-energy dynamics of a chiral theory supplemented by vector resonances. The divergent contributions coming from strong pi-pi scattering are tamed by vector-meson exchange terms. This amounts to softening the fast growing high-energy behaviour of pi-pi scattering. The final result for epsilon'/epsilon shows a smooth dependence on the cut-off where low energy dynamics is matched with that of QCD.
Cite
@article{arxiv.hep-ph/0405250,
title = {Vector Meson Contributions in epsilon'/epsilon},
author = {Anirban Kundu and Emmanuel A. Paschos and Yu-Feng Zhou},
journal= {arXiv preprint arXiv:hep-ph/0405250},
year = {2014}
}
Comments
11 pages, 2 figures. published version