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On chiral symmetry breaking, topology and confinement

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Abstract

We start with the relation between the chiral symmetry breaking and gauge field topology. New lattice results further enhance the notion of Zero Mode Zone, a very narrow strip of states with quasizero Dirac eigenvalues. Then we move to the issue of "origin of mass" and Brown-Rho scaling: a number of empirical facts contradicts to the idea that masses of quarks and such hadrons as ρ, N decrease near Tc. We argue that while at T=0 the main contribution to the effective quark mass is chirally odd mχ, near Tc it rotates to chirally-even component mχ, because "infinite clusters" of topological solitons gets split into finite ones. Recent progress in understanding of topology require introduction of nonzero holonomy 〈A0〉≠0, which splits instantons into Nc (anti)selfdual "instanton-dyons". Qualitative progress, as well as first numerical studies of the dyon ensemble are reported. New connections between chiral symmetry breaking and confinement are recently understood, since instanton-dyons generate holonomy potential with a minimum at confining value, if the ensemble is dense enough.

Original languageEnglish
Pages (from-to)138-143
Number of pages6
JournalNuclear Physics, Section A
Volume928
DOIs
StatePublished - 2014

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