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Title: Stationary phase corrections in the process of bosonization of multi-quark interactions
Authors: Osipov, A. A. 
Hiller, B. 
Moreira, J. 
Blin, A. H. 
Issue Date: 2006
Citation: The European Physical Journal C - Particles and Fields. 46:1 (2006) 225-233
Abstract: Abstract 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.
DOI: 10.1140/epjc/s2006-02488-7
Rights: openAccess
Appears in Collections:FCTUC Física - Artigos em Revistas Internacionais

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