B_K from quenched overlap QCD
High Energy Physics - Lattice
2015-06-25 v1 High Energy Physics - Phenomenology
Abstract
We present an exploratory calculation of the standard model Delta S=2 matrix element relevant for indirect CP violation in K -> pi pi decays. The computation is performed with overlap fermions in the quenched approximation at beta=6.0 on a 16^3x32 lattice. The resulting bare matrix element is renormalized non-perturbatively. Our preliminary result is B_K^{NDR}(2 GeV)=0.61(7), where the error does not yet include an estimate of systematic uncertainties.
Cite
@article{arxiv.hep-lat/0212015,
title = {B_K from quenched overlap QCD},
author = {N. Garron and L. Giusti and C. Hoelbling and L. Lellouch and C. Rebbi},
journal= {arXiv preprint arXiv:hep-lat/0212015},
year = {2015}
}
Comments
3 pages, 2 figures, Lattice2002(matrixel). Parallel session talk by L. Lellouch at the 20th International Symposium on Lattice Field Theory (Lattice 2002), Boston, Massachusetts, 24-29 June 2002