Gravitational waves in string-motivated gravity
Published on:
14 March 2024
Primary Category:
General Relativity and Quantum Cosmology
Paper Authors:
Tatsuya Daniel,
Leah Jenks
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Key Details
Chern-Simons and Gauss-Bonnet gravity with coupled scalar fields arises from string theory
Studies gravitational wave propagation in this combined theory
Finds similar contributions from parity-violating and parity-conserving sectors
Extra contribution from axion-dilaton coupling
Uses extended parametrization to constrain theory parameters
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Gravitational waves in string-motivated gravity
This paper reviews how a combination of Chern-Simons and Gauss-Bonnet gravity with coupled scalar fields arises from string theory. It studies how gravitational waves propagate in this theory, finding similar contributions from the parity-violating Chern-Simons and parity-conserving Gauss-Bonnet sectors. There is also an extra contribution from the kinetic coupling between the axion and dilaton scalar fields. Initial constraints are discussed using a novel parametrization extended to include parity-conservation.
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