Non-perturbative renormalization of left-left four-fermion operators in quenched lattice QCD

Details Non-perturbative renormalization of left-left four-fermion operators in quenched lattice QCD Non-perturbative renormalization of left-left four-fermion operators in quenched lattice QCD

2005-05-04

arxiv.org/abs/hep-lat/0505002v1

JHEP 0603 (2006) 088

Physics

High Energy Physics

High Energy Physics - Lattice

52 pages, 6 figures (40 eps files)

Scientific paper

We define a family of Schroedinger Functional renormalization schemes for the four-quark multiplicatively renormalizable operators of the $\Delta F = 1$ and $\Delta F = 2$ effective weak Hamiltonians. Using the lattice regularization with quenched Wilson quarks, we compute non-perturbatively the renormalization group running of these operators in the continuum limit in a large range of renormalization scales. Continuum limit extrapolations are well controlled thanks to the implementation of two fermionic actions (Wilson and Clover). The ratio of the renormalization group invariant operator to its renormalized counterpart at a low energy scale, as well as the renormalization constant at this scale, is obtained for all schemes.

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