Anomalous chiral perturbation theory meson Lagrangian to order p6 reexamined -: art. no. 054033

We present a revised and extended construction of the mesonic Lagrangian density in chiral perturbation theory (ChPT) at order p(6) in the anomalous (or epsilon) sector, L-6,L-epsilon. After improving several aspects of the strategy we used originally, i.e., a more efficient application of partial integration, the implementation of so-called Bianchi identities, and additional trace relations, we find the new monomial sets to include 24 SU(N-f), 23 SU(3), and 5 SU(2) elements. Furthermore, we introduce 8 supplementary terms due to the extension of the chiral group to SU(N-f)(L) x SU(N-f)(R) x U(1)(v).