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2009

Generalized Chern-Simons Modified Gravity in First-Order Formalism

Ertem, Ümit, Açık, Özgür

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We propose a generalization of Chern-Simons (CS) modified gravity in first-order formalism.

CS modified gravity action has a term that comes from the chiral anomaly which is Pontryagin invariant.
First-order CS modified gravity is a torsional theory and in a space-time with torsion the chiral anomaly includes a torsional topological term called Nieh-Yan invariant.
We generalize the CS modified gravity by adding the Nieh-Yan term to the action and find the effective theory.

Generalized Chern-Simons Modified Gravity in First-Order Formalism · Around

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