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EnglishThe aim of this work is to study some possible local and global U(1) axial condensates in the high-temperature chirally restored phase of QCD, by means of two nonperturbative analytical techniques: (i) by expressing the functional averages in terms of the spectral density of the Euclidean Dirac operator and (ii) by evaluating the functional integrals in the instanton-background approximation. In this way, besides proving that these condensates are indeed different from zero in the high-temperature regime, we shall also derive their asymptotic temperature dependence and compare it with that of the topological susceptibility.
| Autori interni: | ||
| Autori: | Carabba, N.; Meggiolaro, E. | |
| Titolo: | Study of some local and global U (1) axial condensates in QCD at finite temperature | |
| Anno del prodotto: | 2022 | |
| Abstract: | The aim of this work is to study some possible local and global U(1) axial condensates in the high-temperature chirally restored phase of QCD, by means of two nonperturbative analytical techniques: (i) by expressing the functional averages in terms of the spectral density of the Euclidean Dirac operator and (ii) by evaluating the functional integrals in the instanton-background approximation. In this way, besides proving that these condensates are indeed different from zero in the high-temperature regime, we shall also derive their asymptotic temperature dependence and compare it with that of the topological susceptibility. | |
| Digital Object Identifier (DOI): | 10.1103/PhysRevD.105.054034 | |
| Appare nelle tipologie: | 1.1 Articolo in rivista |
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