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Meson Form-Factors And The Quark-Based Linear Sigma Model

Authors: M. D. Scadron, F. Kleefeld, G. Rupp and E. van Beveren

Ref.: Fizika B 13, 43-56 (2004)

Abstract: The quark-level linear s model (LsM) is employed to compute a variety of electromagnetic and weak observables of light mesons, including pion and kaon form factors and charge radii, charged-pion polarizabilities, semileptonic weak Kl3 decay, semileptonic weak radiative pion and kaon form factors, radiative decays of vector mesons, and nonleptonic weak K2p decay. The agreement of all these predicted observables with experiment is striking. In passing, the tight link between the LsM and vector-meson dominance is shown. Some conclusions are drawn on the LsM in connection with lattice and renormalization-group approaches to QCD.