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We discuss semiclassical bound states in a manifestly chiral-symmetric model, the Nambu-Jona-Lasinio model in 2 space-time dimensions. The mass spectrum of the bound states in the theory is found using the semiclassical method of Dashen, Hasslacher, and Neveu. We also discuss the connection between the classical confined solution of the nonlinear Dirac equation and the quantized version of the theory.
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Sun-Sheng Shei (1976) studied this question.
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