Exact flow equations and the U(1) problem
The effective action of an SU(N)-gauge theory coupled to fermions is evaluated at a large infrared cutoff scale k within the path integral approach. The gauge field measure includes topologically non-trivial configurations (instantons). Because of the explicit infrared regularization, there are no g...
Gespeichert in:
| 1. Verfasser: | |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
15 July 1998
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| In: |
Physical review. D, Particles, fields, gravitation, and cosmology
Year: 1998, Jahrgang: 58, Heft: 4 |
| ISSN: | 1550-2368 |
| DOI: | 10.1103/PhysRevD.58.045011 |
| Online-Zugang: | Verlag, Volltext: http://dx.doi.org/10.1103/PhysRevD.58.045011 Verlag, Volltext: https://link.aps.org/doi/10.1103/PhysRevD.58.045011 
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| Verfasserangaben: | J.M. Pawlowski |
MARC
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| 520 | |a The effective action of an SU(N)-gauge theory coupled to fermions is evaluated at a large infrared cutoff scale k within the path integral approach. The gauge field measure includes topologically non-trivial configurations (instantons). Because of the explicit infrared regularization, there are no gauge field zero modes. The Dirac operator of instanton configurations shows a zero mode even after the infrared regularization, which leads to UA(1)-violating terms in the effective action. These terms are calculated in the limit of large scales | ||
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