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Matter matters in Einstein-Cartan gravity

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 نشر من قبل Georgios K. Karananas Dr.
 تاريخ النشر 2021
  مجال البحث فيزياء
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We study scalar, fermionic and gauge fields coupled nonminimally to gravity in the Einstein-Cartan formulation. We construct a wide class of models with nondynamical torsion whose gravitational spectra comprise only the massless graviton. Eliminating non-propagating degrees of freedom, we derive an equivalent theory in the metric formulation of gravity. It features contact interactions of a certain form between and among the matter and gauge currents. We also discuss briefly the inclusion of curvature-squared terms.



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