arXiv subjects

Alberto Blasi

Publications and source records attributed to Alberto Blasi.

20 records · Page 2Linked to original sources

arXiv1992

Infrared and Ultraviolet Finiteness of Topological BF Theory in Two Dimensions

The two--dimensional topological BF model is considered in the Landau gauge in the framework of perturbation theory. Due to the singular behaviour of the ghost propagator at long distances, a mass term to the ghost fields is introduced as infrared regulator. Relying on the supersymmetric algebraic structure of the resulting massive theory, we study the infrared and ultraviolet renormalizability of the model, with the outcome that it is perturbatively finite.

hep-th↗

arXiv1992

Non-Renormalization Properties of the Chern-Simons Action Coupled to Matter

We analyze an abelian gauge model in 3 dimensions which includes massless scalar matter fields. By controlling the trace anomalies with a local dilatation Ward identity, we show that, in perturbation theory and within the BPHZL scheme, the Chern-Simons term has no radiative corrections. This implies, in particular, the vanishing of the corresponding $β$ function in the renormalization group equation.

hep-th↗