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Current-algebraic techniques are used to reproduce and extend the results of a gauge model for the pion mass and the ρ^' vector boson. A formula is obtained, giving m_π² as an integral over spectral functions of certain SU(2) ×{} SU(2) currents, and valid to second order in the ρ^' coupling constant and all orders in the strong coupling. The general mechanism for generating the pion mass seems to be extendable to a wide class of models.
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Bars et al. (1973) studied this question.
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