Effective lagrangian approach to vector mesons, their structure and decays

Abstract

An improved update of the structure and decays ofρ 0,ω andφ mesons based on a chiral SU(3) Lagrangian, including anomaly terms is presented. We demonstrate that a consistent and quantitatively successful description of both pion and kaon electromagnetic form factors can be achieved. We also discuss thee + e −→π + π 0 π − cross section, the Dalitz decayω→π 0 μ + μ − and aspects ofρ 0 ω andωφ mixing. Relations to previous versions of the Vector Meson Dominance model will be examined.