Migdal approximation and 1/N expansion in QCD |
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Authors: | G Paffuti |
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Institution: | 1. Istituto di Fisica, Università di Pisa, Pisa, Italy;2. Istituto Nazionale di Fisica Nucleare, Sezione di Pisa, Pisa, Italy |
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Abstract: | We show that the Migdal approximation for the renormalization group in gauge theories in exact in the leading order in , above a critical value of the coupling constant. A systematic expansion in is proposed. The string tension is calculated in the leading order in in a theory without fermions. |
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Keywords: | |
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