Non-perturbative scale evolution of four-fermion operators in two-flavour QCD

Details Non-perturbative scale evolution of four-fermion operators in two-flavour QCD Non-perturbative scale evolution of four-fermion operators in two-flavour QCD

2006-10-12

arxiv.org/abs/hep-lat/0610077v1

PoSLAT2006:158,2006

Physics

High Energy Physics

High Energy Physics - Lattice

7 pages, 2 figures, talk presented at Lattice2006 (Renormalization)

Scientific paper

We apply finite-size recursion techniques based on the Schrodinger functional formalism to determine the renormalization group running of four-fermion operators which appear in the Delta S=2 effective weak Hamiltonian of the Standard Model. Our calculations are done using O(a) improved Wilson fermions with N_f=2 dynamical flavours. Preliminary results are presented for the four-fermion operator which determines the B_K parameter in tmQCD.

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