The Weak OPE and Dimension-eight Operators
High Energy Physics - Phenomenology
2007-05-23 v1
Abstract
We discuss recent work which identifies a potential flaw in standard treatments of weak decay amplitudes, including that of epsilon'/epsilon. The point is that (contrary to conventional wisdom) dimension-eight operators contribute to weak amplitudes at order G_F alpha_s and without 1/M_W^2 suppression. The effect of dimension-eight operators is estimated to be at the 100% level in a sum rule determination of the operator Q_7^(6) at mu = 1.5 GeV, suggesting that presently available values of mu are too low to justify the neglect of these effects.
Keywords
Cite
@article{arxiv.hep-ph/0008338,
title = {The Weak OPE and Dimension-eight Operators},
author = {Eugene Golowich},
journal= {arXiv preprint arXiv:hep-ph/0008338},
year = {2007}
}
Comments
3 pages, using macro ws-p10x7.cls, talk presented at ICHEP2000 (Osaka, Japan)