Confinement and meson properties within the domain model of QCD vacuum
Seminars
Seminar on Hadron Physics
Date and Time: Thursday, 20 April 2017, at 11:00 AM
Venue: Blokhintsev Hall (4th floor), Bogoliubov Laboratory of Theoretical Physics
Seminar topic: «Confinement and meson properties within the domain model of QCD vacuum»
Speaker: Vladimir Voronin (BLTP JINR)
Abstract:
The ensemble of almost everywhere homogeneous Abelian (anti-)self-dual fields is represented as domain wall network. The character of confined color-charged field fluctuations in the domain bulk are investigated in detail. It is shown that color charged quasiparticles can be excited inside the domain wall junctions, which indicates deconfinement. Spectra of gluon and quark quasiparticles inside the domain wall are investigated. The Nielsen-Olesen tachyonic gluon modes are shown to restrict the maximal size of deconfinement region for the cylindrical domain wall junction.
The effective meson action, which is invariant with respect to gauge transformations of vacuum field and diagonal with respect to radial quantum number of mesons, is constructed. Thus defined action allows for consistent description of spectra and interactions (weak, electromagnetic and strong) of mesons with any flavor content. Spectra, leptonic decay constants, electromagnetic transition and decay constants, strong decay constants gVPP were calculated.
Influence of almost everywhere homogeneous Abelian (anti-)self-dual gluon fields on transition form factors and decay constants gVPP is analyzed in detail. The local gauge invariance of the nonlocal meson-quark vertices is shown to be important for successful description of the formfactors and decay constants.