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[en] The XIIth Rencontre de Moriond has devoted a two-day session to the problem of Color Symmetry and Quark Confinement. The twelve talks given at that session have been collected with an added pedagogical introduction. The review papers summarize the current situation at April-May 1977 about color and how it can be tested experimentally
[en] This paper presents a simple dynamical scheme to supplement the complementarity and Higgs phase analyses of composite models with semi-simple metacolor groups. The critical couplings which signal the dynamical breakdown of the various simple groups contained in the metacolor semi-simple group determine the order of appearance of the condensates of the simple groups. Together with the Higgs phase analysis, it helps to determine the global symmetry of the fermion composite. The global symmetry group will eventually be gauged to form the low energy dynamical symmetry group of the composite
[en] Models with complementarity for massless composite fermions are investigated. Through a study of 't Hooft's equations, we find a simple general criterion for the maximal conserved flavour group in terms of a given set of bi-fermion condensates in the Higgs picture. (orig.)
[en] We study non-Abelian discrete flavor symmetries, which appear in magnetized brane models. For example, D4, Δ(27) and Δ(54) flavor symmetries can appear with matter fields in several representations. We also study the orbifold background, where non-Abelian flavor symmetries are broken in a certain way.
[en] We discuss the one loop matching procedure in ZQCD. Universality and Casimir scaling leave - in terms of the 't Hooft coupling - just two combinations of parameters to be fixed numerically. These numbers are then the same for any number of colours.
[en] We introduce one matrix model coupled to multi-flavor vectors. The two-flavor vector model is demonstrated to reproduce the two-point correlation numbers of boundary primary fields of two dimensional (2,2p+1) minimal Liouville gravity on disk, generalizing the loop operator (resolvent) description. The model can properly describe non-trivial boundary conditions for the matter Cardy state as well as for the Liouville field. From this we propose that the n-flavor vector model will be suited for producing the boundary correlation numbers with n different boundary conditions on disk.
[en] We discuss the flavor Polyakov loop enhanced Nambu–Jona-Lasinio model in a finite volume. The main objective is to check the volume scaling of thermodynamic observables for various temperatures and chemical potentials. We observe the possible violation of the scaling with system size in a considerable window along the whole transition region in the plane. (letter)
[en] We propose a simple mechanism for stabilizing flavon fields with aligned vacuum structure in models with discrete flavor symmetry. The basic idea is that flavons are stabilized by the balance between the negative soft mass and non-renormalizable terms in the potential. We explicitly discuss how our mechanism works in flavor model, and show that the field content is significantly simplified. It also works as a natural solution to the cosmological domain wall problem.