arXiv:hep-lat/0209131·v1·High Energy Physics — Lattice
Non-perturbative renormalisation of four fermion operators and B-bar B mixing with Wilson fermions
D. Becirevic🇮🇹 · V. Gimenez🇪🇸 · V. Lubicz🇮🇹 · G. Martinelli🇮🇹 · M. Papinutto🇩🇪 · J. Reyes🇮🇹
Abstract
We present new results for the renormalisation and subtraction constants for the four fermion Delta F=2 operators, computed non-perturbatively in the RI-MOM scheme (in the Landau gauge). From our preliminary analysis of the lattice data at beta=6.45, for the B-bar B mixing bag-parameter we obtain B_B^{RGI} = 1.46(7)(1).
Comments: 3 pages (4 figures), Lattice2002(heavyquark)