Propagating Torsion in 3D-Gravity and Dynamical Mass Generation
arXiv:hep-th/9905110 · doi:10.1088/0264-9381/19/8/310
Abstract
In this paper, fermions are minimally coupled to 3D-gravity where a dynamical torsion is introduced. A Kalb-Ramond field is non-minimally coupled to these fermions in a gauge-invariant way. We show that a 1-loop mass generation mechanism takes place for both the 2-form gauge field and the torsion. As for the fermions, no mass is dynamically generated: at 1-loop, there is only a mass shift proportional to the Yukawa coupling whenever the fermions have a non-vanishing tree-level mass.
13 pages, latex file, no figures, some corrections added
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