Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2006-06-04
ActaPhys.Polon.B38:2831-2840,2007
Physics
High Energy Physics
High Energy Physics - Phenomenology
pages, 1 figure. The relevance of the center Z(3) of SU(3), and chiral symmetry breaking trilinear in the fields are emphasize
Scientific paper
The same, well known, det(Sigma)+ h.c. term in effective theories, which 't Hooft showed is generated by instantons in QCD and which resolves the UA(1) problem giving mass, in particular to the $\eta'$ is for three light flavors shown to give three classical minima along the UA(1) circle. The three minima are related to the Z(3) center of SU(3). The term also contributes, in a similar way as the diquark model of Jaffe, to an inverted scalar mass spectrum for the light scalars. The three vacua suggests a connection to the strong CP problem and confinement.
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