2006/11/21 by Gurjav Ganbold, G. Ganbold, Ganbold, G.
Physics and Astronomy · #Quantum optics and atomic interactions #hep-ph
paper · pdf · doi:10.48550/arxiv.hep-ph/0611277
6 pages, 3 figures, typos corrected, minor modification in text, content unchanged
arxiv created 2006/11/27 · arxiv updated 2009/12/01
We estimate the decay constants fπ and fK of the light mesons within a relativistic quantum-field model of interacting quarks and gluons confined analytically. The necessary physical parameters, the quark masses mu and ms, the coupling constant αs and the confinement scale Λ have been obtained from our previous investigation on the meson ground states, orbital and radial excitations by using the ladder Bethe-Salpeter equation. Our approach provides a solid framework to compute the meson spectra, the lowest glueball state and decay constants of pseudoscalar mesons (as well as other physical observables) nonperturbatively from the basic principles of QCD and QFT.