Non-perturbative renormalisation of left-left four-fermion operators with Neuberger fermions

Details Non-perturbative renormalisation of left-left four-fermion operators with Neuberger fermions Non-perturbative renormalisation of left-left four-fermion operators with Neuberger fermions

2006-07-20

arxiv.org/abs/hep-lat/0607028v1

Phys.Lett. B641 (2006) 118-124

Physics

High Energy Physics

High Energy Physics - Lattice

14 pages, 3 figures

Scientific paper

10.1016/j.physletb.2006.08.009

We outline a general strategy for the non-perturbative renormalisation of composite operators in discretisations based on Neuberger fermions, via a matching to results obtained with Wilson-type fermions. As an application, we consider the renormalisation of the four-quark operators entering the Delta S=1 and Delta S=2 effective Hamiltonians. Our results are an essential ingredient for the determination of the low-energy constants governing non-leptonic kaon decays.

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