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Quark condensate and pseudoscalar decay constant in the chiral limit are theprincipal order parameters of spontaneous chiral symmetry breaking in QCD. Yettheir three flavor values are still only weakly constrained by analyses usingexperimental data. We try to obtain such constraints by statistical methodsfrom the decay width of the eta to pi+pi-pi0 decay in the framework of resummedchiral perturbation theory. We rely on recent estimates of the isospinviolating parameter R, which is proportional to the difference of the u and dquark masses. Alternatively, we relax the assumption and try to extractinformation on R as well.

Constraints on 3-flavor QCD order parameters from eta to pi+pi-pi0 decay width