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- Title
Four-fermion interaction from torsion as dark energy.
- Authors
Popławski, Nikodem
- Abstract
The observed small, positive cosmological constant may originate from a four-fermion interaction generated by the spin-torsion coupling in the Einstein-Cartan-Sciama-Kibble gravity if the fermions are condensing. In particular, such a condensation occurs for quark fields during the quark-gluon/hadron phase transition in the early Universe. We study how the torsion-induced four-fermion interaction is affected by adding two terms to the Dirac Lagrangian density: the parity-violating pseudoscalar density dual to the curvature tensor and a spinor-bilinear scalar density which measures the nonminimal coupling of fermions to torsion.
- Subjects
FERMIONS; TORSION; DIRAC function; LAGRANGIAN functions; COSMOLOGICAL constant
- Publication
General Relativity & Gravitation, 2012, Vol 44, Issue 2, p491
- ISSN
0001-7701
- Publication type
Article
- DOI
10.1007/s10714-011-1288-1