Chiral fermions and torsion in the early Universe

Details Chiral fermions and torsion in the early Universe Chiral fermions and torsion in the early Universe

2009-11-09

arxiv.org/abs/0911.1636v3

Class.Quant.Grav.27:095010,2010; Erratum-ibid.27:249801,2010

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

5 pages revtex4; error in v1 corrected.

Scientific paper

10.1088/0264-9381/27/9/095010 10

Torsion arising from fermionic matter in the Einstein-Cartan formulation of general relativity is considered in the context of Robertson-Walker geometries and the early Universe. An ambiguity in the way torsion arising from hot fermionic matter in chiral models should be implemented is highlighted and discussed. In one interpretation, chemical potentials in chiral models can contribute to the Friedmann equation and give a negative contribution to the energy density.

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