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research article
Matter matters in Einstein-Cartan gravity
September 14, 2021
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 themassless graviton. Eliminating nonpropagating degrees of freedom, we derive an equivalent theory in themetric formulation of gravity. It features contact interactions of a certain formbetween, and among, the matter and gauge currents. We also discuss briefly the inclusion of curvature-squared terms.
Type
research article
Web of Science ID
WOS:000696022000008
Authors
Publication date
2021-09-14
Publisher
Published in
Volume
104
Issue
6
Article Number
064036
Peer reviewed
REVIEWED
EPFL units
Available on Infoscience
September 25, 2021
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