2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/184992I review our qualitative understanding of the increase in the value of the B meson decay constant (fB), when dynamical fermions are included in lattice QCD calculations.4 pages. Talk at UK Phenomenology Workshop on Heavy Flavour and CP Violation, Durham, 17 - 22 September 2000 (Minor typo fixed)High Energy Physics - Latticetext