arXiv:hep-lat/0610077·v1·High Energy Physics — Lattice
Non-perturbative scale evolution of four-fermion operators in two-flavour QCD
ALPHA Collaboration: P. Dimopoulos🇮🇹 · G. Herdoiza🇮🇹 · F. Palombi🇩🇪 · C. Pena🇨🇭 · S. Sint🇮🇪 · A. Vladikas🇮🇹
Abstract
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.
Comments: 7 pages, 2 figures, talk presented at Lattice2006 (Renormalization)