Consequences of Propagating Torsion in Connection-Dynamic Theories of Gravity

Abstract

We discuss the possibility of constraining theories of gravity in which the connection is a fundamental variable by searching for observational consequences of the torsion degrees of freedom. In a wide class of models, the only modes of the torsion tensor which interact with matter are either a massive scalar or a massive spin-1 boson. Focusing on the scalar version, we study constraints on the two-dimensional parameter space characterizing the theory. For reasonable choices of these parameters the torsion decays quickly into matter fields, and no long-range fields are generated which could be discovered by ground-based or astrophysical experiments.

16 pages plus one figure (plain TeX), MIT-CTP #2291. (Extraordinarily minor corrections.)

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• Actions for Gravity, with Generalizations: A Review
• Poincaré Gauge Theory for Gravitational Forces in (1+1) Dimensions

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