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hep-th2003
Auxiliary Field Method in 4- and 3- dimensional Nambu--Jona-Lasinio Models
Taro Kashiwa, Tomohiko Sakaguchi
In order to check the validity of auxiliary field method in the Nambu--Jona-Lasinio model, the one-loop (=quantum) effects of auxiliary fields to the gap equation are considered wi…
hep-th2003
Caustics in the Grassmann Integral
Taro Kashiwa, Tomohiko Sakaguchi
It is shown that a simple model of 2N-Grassmann variables with a four-body coupling involves caustics when the integral has been converted to a bosonic form with the aid of the aux…