Some properties of the two-point functions in a dilatationally covariant field theory |
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Authors: | Jan T Łopuszański |
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Institution: | Institute of Theoretical Physics, University of Wroc?aw, Wroc?aw, Poland |
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Abstract: | The object of our concern are some properties of the two-point functions in a model of dilatationally covariant field theory. We examine the one- and two-dimensional irreducible representations of the dilatation group. For the one-dimensional case we obtain either a massless free field theory or a theory of an interacting field which does not contribute on the mass shell μ=p2=0 and is characterized by a spectral function μr+?1. In the two-dimensional case both fields differ from the free field, their spectral functions ρij(μ) do not vanish identically and are products of two factors, a polynomial of order up to two in ln μ and μr+?-1. The differences between the case of internal symmetry and the case of dilatations are emphasized. The formula for the form factor in the Araki-Haag limit is given. |
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