Including electromagnetism in $K\to\pi\pi$ decay calculations
High Energy Physics - Lattice
2018-04-18 v1
Abstract
Because of the small size of the ratio A_2/A_0 of the I=2 to I=0 K -> pipi decay amplitudes (the Delta I=1/2 rule) the effects of electromagnetism on A_2 may be a factor of 20 larger than given by a naive O(alpha) estimate. Thus, if future calculations of A_2 and epsilon'/epsilon are to achieve 10% accuracy, these effects need to be included. Here we present the first steps toward including electromagnetism in a calculation of the standard model K -> pipi decay amplitudes using lattice QCD.
Cite
@article{arxiv.1711.09339,
title = {Including electromagnetism in $K\to\pi\pi$ decay calculations},
author = {Norman Christ and Xu Feng},
journal= {arXiv preprint arXiv:1711.09339},
year = {2018}
}
Comments
8 pages, 1 figures, presented at the 35th International Symposium on Lattice Field Theory (Lattice 2017)