A model for the very early Universe


A model with N species of massless fermions interacting via (microscopic) gravitational torsion in de Sitter spacetime is investigated in the limit N → ∞. The UV (N)×UA(N) flavor symmetry is broken dynamically irrespective of the (positive) value of the induced four-fermion coupling. This model is equivalent to a theory with free but massive fermions… (More)


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@inproceedings{Giacosa2008AMF, title={A model for the very early Universe}, author={Francesco Giacosa and Ralf Hofmann and Matthias Neubert}, year={2008} }