Abstract
Quark condensate and pseudoscalar decay constant in the chiral limit are the
principal order parameters of spontaneous chiral symmetry breaking in QCD. Yet
their three flavor values are still only weakly constrained by analyses using
experimental data. We try to obtain such constraints by statistical methods
from the decay width of the eta to pi+pi-pi0 decay in the framework of resummed
chiral perturbation theory. We rely on recent estimates of the isospin
violating parameter R, which is proportional to the difference of the u and d
quark masses. Alternatively, we relax the assumption and try to extract
information on R as well.
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