Strong coupling in the quantum field theory with nonlocal nonpolynomial interaction |
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Authors: | G. V. Efimov |
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Affiliation: | (1) Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, Dubna, USSR |
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Abstract: | In the relativistic quantum field theory the representation for theS-matrix elements is obtained for any coupling constantsg in the case of a one component scalar field (x) with nonlocal nonpolynomial interaction I()=gU() when the causal function is bounded in the Euclidean region 0Dc(xE2Dc(0)< and the function |U(u)|1 for realu. It is proved that the two point Green function is bounded in the physical region of momenta variablep2. |
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