Journal
EUROPEAN PHYSICAL JOURNAL C
Volume 46, Issue 1, Pages 225-233Publisher
SPRINGER
DOI: 10.1140/epjc/s2006-02488-7
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The functional integration over the auxiliary bosonic variables of cubic order related with the effective action of the Nambu-Jona-Lasinio model with 't Hooft term has recently been obtained in the form of a loop expansion. Even numbers of loops contribute to the action, while odd numbers of loops are assigned to the measure. We consider the two-loop corrections and analyse their effect on the low-lying pseudoscalar and scalar mass spectra, quark condensates and weak decay constants. The results are compared to the leading order calculations and other approaches.
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