[SEMINARI] SEMINAR: Michele Della Morte

[German Rodrigo Garcia]

HQET on the lattice. A non-perturbative computation of the b-quark mass

Michele Della Morte
Humboldt-Universitaet zu Berlin
Wednesday, 28 of June of 2006     12:00 PM
IFIC's Seminar

Abstract

Hadronic bound states of heavy quark constituents are characterized by a 
large separation of mass scales: the heavy quark mass scale is much larger 
than the scale \Lambda_{QCD} associated with the light degrees of freedom. 
HQET provides a tool to separate the physics associated with the two 
scales. The evaluation of amplitudes in HQET should be carried out at the 
non-perturbative level, while the matching to the full theory is in 
principle affected by short-distance physics only. In this context lattice 
field theory methods and non-perturbative renormalization techniques 
represent an invaluable tool to obtain precise theoretical predictions of 
quantities such as heavy quark masses or decay constants. We present a 
fully non-perturbative computation of the renormalization group invariant 
mass of the b-quark in the quenched approximation and including the terms 
of order \Lambda^2/mb.