Mixing and decay constants of pseudoscalar mesons: the sequel

We present further tests and applications of the new eta-eta' mixing scheme recently proposed by us. The particle states are decomposed into orthonorm al basis vectors in a light-cone Fock; representation. Because of flavor sy mmetry breaking the mixing of the decay constants can be identical to the m ixing of particle states at most for a specific choice of this basis. Theor etical and phenomenological considerations show that the quark flavor basis has this property and allows, therefore, for a reduction of the number of mixing parameters. A detailed comparison with other mixing schemes is also presented. (C) 1999 Published by Elsevier Science B.V. All rights reserved.