Abstract
In the work (Ben Geloun and Bonzom 2011 Int. J. Theor. Phys. 50 2819), it has been proved that the radiative corrections of the 2-point function in the SU(2) Boulatov tensor model generates a marginal (in the renormalization group sense) contribution of the form of a Laplacian. Such a term, which was missing in the initial Boulatov model action, should be added in that action before discussing the renormalization analysis of this model. In this work, by linearizing the group manifold, we prove that the amplitudes associated with Feynman graphs with external legs of the colored Boulatov model over U(1)3 endowed with a Laplacian dynamics are all convergent. We conjecture that the same feature happens for the corresponding Boulatov model over SU(2). Higher rank models are also discussed.
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