Generation of confinement and other nonperturbative effects by infrared gluonic degrees of freedom
نویسنده
چکیده
Recent progress in understanding the emergence of confinement and other nonperturbative effects in the strong interaction vacuum is reviewed. Special emphasis is placed on the role of different types of collective infrared gluonic degrees of freedom in this respect. After a survey of complementary approaches, models of the QCD vacuum based on center vortices, Abelian magnetic monopoles and topological charge lumps such as instantons, merons and calorons are examined. Both the physical mechanisms governing these models as well as recent lattice studies of the respective degrees of freedom are reviewed.
منابع مشابه
On the Dirac Structure of Confinement
The Dirac structure of confinement is shown to be of timelike-vector nature in the heavy quark limit of QCD. This stands in contradiction with the phenomenological success of the Dirac scalar confining potential. A resolution is achieved through the demonstration that an effective scalar interaction is dynamically generated by nonperturbative mixing between ordinary and hybrid QQ̄ states. The re...
متن کاملColor Confinement and Dynamical Effect of Light Quarks in the Dual Ginzburg-landau Theory
We study nonperturbative features of QCD using the dual Ginzburg-Landau theory. The color confinement is realized through the dual Higgs mechanism, which is brought by QCD-monopole condensation. We investigate the infrared screening effect on the color confinement due to the light-quark pair creation. By solving the Schwinger-Dyson equation, we find that the dynamical chiral-symmetry breaking i...
متن کاملHybrid Decays
The heavy quark expansion of Quantum Chromodynamics and the strong coupling flux tube picture of nonperturbative glue are employed to develop the phenomenology of hybrid meson decays. The decay mechanism explicitly couples gluonic degrees of freedom to the pair produced quarks and hence does not obey the well known, but model-dependent, selection rule which states that hybrids do not decay to p...
متن کاملQcd Running Coupling: Freezing versus Enhancement in the Infrared Region
We discuss whether or not ”freezing” of the QCD running coupling constant in the infrared region is consistent with the Schwinger – Dyson (SD) equations. Since the consistency of the ”freezing” was not found, the conclusion is made that the ”analytization” method does not catch an essential part of nonperturbative contributions. Proceeding from the results on consistency of the infrared enhance...
متن کاملGluonic effects in η′-nucleon interactions
We review the theory and phenomenology of the axial U(1) problem with emphasis on the role of gluonic degrees of freedom in the low-energy pp → ppη and pp → ppη′ reactions. ∗email: [email protected]
متن کامل