Instanton molecules at high temperature - the Georgi-Glashow model and beyond

Physics – High Energy Physics – High Energy Physics - Theory

Scientific paper

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23 pages, 4 figures, minor changes are made

Scientific paper

10.1088/1126-6708/2001/03/021

We show that correlators of some local operators in gauge theories are sensitive to the presence of the instantons even at high temperature where the latter are bound into instanton-anti-instanton "molecules". We calculate correlation functions of such operators in the deconfined phase of the 2+1 dimensional Georgi-Glashow model and discuss analogous quantities in the chirally symmetric phase of QCD. We clarify the mechanism by which the instanton-anti-instanton molecules contribute to the anomaly of axial U(1) at high temperature.

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