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

Abstract

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.

14 pages, 3 figures

References in corpus (2)

• The Schrödinger functional in lattice QCD with exact chiral symmetry
• K-->pipi amplitudes from lattice QCD with a light charm quark

Cited by in corpus (6)

• Flavour symmetry restoration and kaon weak matrix elements in quenched twisted mass QCD
• Non-perturbative renormalisation of Delta F=2 four-fermion operators in two-flavour QCD
• K-->pipi amplitudes from lattice QCD with a light charm quark
• Progress in kaon physics on the lattice
• Twisted mass QCD for weak matrix elements
• Towards a quantitative understanding of the Delta I=1/2 rule