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VOLUME 65 (1997) | ISSUE 2 | PAGE 128
Effective quaik lagrangian in the instanton vacuum with nonzero modes included
A new approach to effective theory of quarks in the instanton vacuum is presented. Exact equations for the quark propagator and Lagrangian are derived which contain contributions of all quark modes with known coefficients. The resulting effective Lagrangian differs from the standard one and resembles that of the Nambu—Jona-Lasinio model. PACS: 02.30.Jr, 11.15.-q