Axion gravitodynamics, Lense-Thirring effect, and gravitational waves

Chatzistavrakidis, Athanasios; Karagiannis, Georgios; Manolakos, George; Schupp, Peter (2022) Axion gravitodynamics, Lense-Thirring effect, and gravitational waves. Physical Review D, 105 (10). ISSN 2470-0010

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Abstract

We investigate physical implications of a gravitational analog of axion electrodynamics with a parity violating gravitoelectromagnetic theta term. This is related to the Nieh-Yan topological invariant in gravity with torsion, in contrast to the well-studied gravitational Chern-Simons term quadratic in curvature, coupled via a dynamical axionlike scalar field. Axion gravitodynamics is the corresponding linearized theory. We find that potentially observable effects are over 80 orders of magnitude stronger than for its Chern-Simons counterpart and could be in reach for detection by experiments in the near future. For a near Earth scenario, we derive corrections to the Lense-Thirring effect and compare them to data from satellite based experiments (Gravity Probe B). For gravitational waves, we find modified dispersion relations, derive the corresponding polarization-dependent modified group and phase velocities, and compare them to data from neutron star mergers (GW170817) to derive even stronger bounds.

Item Type:	Article
Uncontrolled Keywords:	Axions; Lense-Thirring effect
Subjects:	NATURAL SCIENCES > Physics NATURAL SCIENCES > Physics > Physics of Elementary Particles and Fields
Divisions:	Theoretical Physics Division
Projects:	Project title Project leader Project code Project type Nove geometrije za gravitaciju i prostor-vrijeme-GRASP Athanasios Chatzistavrakidis IP-2018-01-7615 HRZZ
Depositing User:	Larisa Jonke
Date Deposited:	26 Feb 2024 12:10
URI:	http://fulir.irb.hr/id/eprint/8632
DOI:	10.1103/PhysRevD.105.104029

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