1/N_c and epsilon'/epsilon
High Energy Physics - Phenomenology
2009-10-31 v1
Abstract
We present a recent analysis of epsilon'/epsilon in the 1/N_c expansion. We show that the 1/N_c corrections to the matrix element of Q_6 are large and positive, indicating a Delta I = 1/2 enhancement similar to the one of Q_1 and Q_2 which dominate the CP conserving amplitude. This enhances the CP ratio and can bring the standard model prediction close to the measured value for central values of the parameters. Several comments on the theoretical status of epsilon'/epsilon and the errors in its calculation are given.
Cite
@article{arxiv.hep-ph/0009073,
title = {1/N_c and epsilon'/epsilon},
author = {T. Hambye and P. H. Soldan},
journal= {arXiv preprint arXiv:hep-ph/0009073},
year = {2009}
}
Comments
6 pages, Invited talk presented by T.H. at the QCD 00 High-Energy Physics International Euroconference in Quantum Chromodynamics, July 6-13th 2000, Montpellier, France