Critical couplings for chiral symmetry breaking via instantons

Using an instanton effective action formalism, we compute the critical coupling for the nonperturbative formation of a dynamical mass via instantons in non-Abelian gauge theories with N_f massless fermions. Only continuous phase transitions are considered. For large values of N_f the critical coupli...

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Bibliographic Details
Main Author Roux, F. S
Format Journal Article
LanguageEnglish
Published 07.03.2000
Subjects
Physics - High Energy Physics - Phenomenology
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Summary:Using an instanton effective action formalism, we compute the critical coupling for the nonperturbative formation of a dynamical mass via instantons in non-Abelian gauge theories with N_f massless fermions. Only continuous phase transitions are considered. For large values of N_f the critical couplings are found to be much smaller than the equivalent critical couplings obtained from gauge exchange calculations in the ladder approximation.
Bibliography:UTPT-00-04
DOI:10.48550/arxiv.hep-ph/0003059