Computing the long-distance contribution to the kaon mixing parameter \epsilon_K
High Energy Physics - Lattice
2012-01-11 v1
Abstract
The largest contribution to the CP violating K_L-K_S mixing parameter \epsilon_K comes from second order weak interactions at short distances and can be accurately determined by a combination of electroweak perturbation theory and the calculation of the parameter B_K from lattice QCD. However, there is an additional long distance contribution to \epsilon_K which is estimated to be of order 5%. Here recently introduced lattice techniques for computing the long-distance component of the K_L-K_S mass difference are generalized to this long-distance contribution to \epsilon_K.
Keywords
Cite
@article{arxiv.1201.2065,
title = {Computing the long-distance contribution to the kaon mixing parameter \epsilon_K},
author = {Norman H. Christ},
journal= {arXiv preprint arXiv:1201.2065},
year = {2012}
}
Comments
7 pages; presented at the XXIX International Symposium on Lattice Field Theory, July 10-16 2011, Squaw Valley, Lake Tahoe, California, USA