@article{10272/18767,
year = {2002},
month = {1},
url = {http://hdl.handle.net/10272/18767},
abstract = {We present preliminary results on the computation of the QCD running cou-
pling constant in the ^MOM scheme and Landau gauge with two flavours of dynamical
Wilson quarks. Gluon momenta range up to about 7GeV (β = 5.6, 5.8 and 6.0) with a
constant dynamical-quark mass. This range already allows to exhibit some evidence for
a sizable 1/μ2 correction to the asymptotic behaviour, as in the quenched approximation,
although a fit without power corrections is still possible with a reasonable χ2. Following the
conclusions of our quenched study, we take into account 1/μ2 correction to the asymptotic
behaviour. We find ¤
Nf=2
MS
= 264(27)MeV × [a−1(5.6, 0.1560)/2.19GeV], which leads to
αs(MZ) = 0.113(3)(4). The latter result has to be taken as a preliminary indication rather
than a real prediction in view of the systematic errors still to be controlled. Still, being
two sigmas below the experimental result makes it very encouraging.},
title = {Preliminary calculation of αs from Green functions with dynamical quarks},
author = {Boucaud, Philippe and Leroy, Jean Pierre and Micheli, Jacques and Pène, Olivier and Moutarde, Hervé and Roiesnel, Claude and Rodríguez Quintero, José},
}