LOW-ENERGY HADRONIC-INTERACTIONS BEYOND THE CURRENT-ALGEBRA APPROACH

Within chiral perturbation theory at the quark level (CHPT)q with line ar realization of chiral U(3)XU(3) symmetry the new low-energy AP3-int eraction, produced by convergent box-constituent-quark-loop diagrams, is obtained, and its contributions to processes of low-energy interact ions of low-lying mesons are investigated. The new interaction goes be yond the framework of the low-energy current algebra approach and effe ctive chiral Lagrangians with linear realization of chiral symmetry, c onstructed at the hadronic level.