Recent results on the running coupling in QCD with two massless flavours
Della Morte, M. · Frezzotti, R. · Heitger, J. · Knechtli, F. · Rolf, J. · Sommer, R. · Wolff, U.
Original · EN
We report on the latest results on the running coupling of two flavour QCD in the Schrödinger functional scheme. Results for the step scaling function are obtained from simulations on lattices L/a=8 and L/a=16 which confirm the first results from lattices L/a=4,5,6 presented one year ago by the ALPHA collaboration. We also discuss some algorithmic aspects, in particular concerning the occurrence of metastable states. A modified sampling, in order to estimate the proper weight of these states in the path integral, is proposed and tested.
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