Conference paper

Meson form factors in the quark-based linear σ model

Michael D. Scadron ; Physics Department, University of Arizona, Tucson, AZ 85721, USA
Frieder Kleefeld ; Centro de Física das Interacçoes Fundamentais, Instituto Superior Técnico, P-1049-001 Lisboa, Portugal
George Rupp ; Centro de Física das Interacçoes Fundamentais, Instituto Superior Técnico, P-1049-001 Lisboa, Portugal
Eef Van Beveren ; Departamento de Física, Universidade de Coimbra, P-3004-516 Coimbra, Portugal

Abstract

The quark-level linear σ model (LσM) 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 K2π decay. The agreement of all these predicted observables with experiment is striking. In passing, the tight link between the LσM and vector-meson dominance is shown. Some conclusions are drawn on the LσM in connection with lattice and renormalization-group approaches to QCD.

Keywords

linear sigma model; quarks; mesons; pion; kaon; form factors; charge radii; charged-pion polarizabilities; weak decay

Hrčak ID:

305606

URI

https://hrcak.srce.hr/305606

Publication date:

1.3.2004.

Article data in other languages: croatian

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