%0 Journal Article
%T Neutral kaon mixing beyond the standard model with nf=2+1 chiral fermions
%A P. A. Boyle
%A N. Garron
%A R. J. Hudspith
%J Physics
%D 2012
%I arXiv
%R 10.1103/PhysRevD.86.054028
%X We compute the hadronic matrix elements of the four-quark operators needed for the study of neutral kaon mixing beyond the Standard Model (SM). We use nf=2+1 flavours of domain-wall fermions (DWF) which exhibit good chiral-flavour symmetry. The renormalization is performed non-perturbatively through the RI-MOM scheme and our results are converted perturbatively to MSbar. The computation is performed on a single lattice spacing a=0.086 fm with a lightest unitary pion mass of 290 MeV. The various systematic errors, including the discretisation effects, are estimated and discussed. Our results confirm a previous quenched study, where large ratios of non-SM to SM matrix elements were obtained.
%U http://arxiv.org/abs/1206.5737v2