Heavy-light decay constant at the 1/m order of HQET

Details Heavy-light decay constant at the 1/m order of HQET Heavy-light decay constant at the 1/m order of HQET

2007-10-08

arxiv.org/abs/0710.1553v1

PoSLAT2007:245,2007

Physics

High Energy Physics

High Energy Physics - Lattice

7 pages, contribution to the XXV International Symposium on Lattice Field Theory, parallel session "Standard model parameters

Scientific paper

Following the strategy developed by the ALPHA collaboration, we present a method to compute non-perturbatively the decay constant of a heavy-light meson in HQET including the 1/m corrections. We start by a matching between HQET and QCD in a small volume to determine the parameters of the effective theory non-perturbatively. Observables in the effective theory are then evolved to larger volumes. In two steps a large enough volume is reached to determine the physical decay constant. Some preliminary results in the quenched approximation are shown.

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