New Post-Newtonian Parameter to Test Chern-Simons Gravity

Stephon Alexander and Nicolas Yunes
Phys. Rev. Lett. 99, 241101 – Published 10 December 2007

Abstract

We study Chern-Simons (CS) gravity in the parametrized post-Newtonian (PPN) framework through a weak-field solution of the modified field equations. We find that CS gravity possesses the same PPN parameters as general relativity, except for the inclusion of a new term, proportional to the CS coupling and the curl of the PPN vector potential. This new term leads to a modification of frame dragging and gyroscopic precession and we provide an estimate of its size. This correction might be used in experiments, such as Gravity Probe B, to bound CS gravity and test string theory.

  • Received 9 April 2007

DOI:https://doi.org/10.1103/PhysRevLett.99.241101

©2007 American Physical Society

Authors & Affiliations

Stephon Alexander and Nicolas Yunes

  • Institute for Gravitational Physics and Geometry, Center for Gravitational Wave Physics and Department of Physics, The Pennsylvania State University, University Park, Pennsylvania 16802, USA

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 99, Iss. 24 — 14 December 2007

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review Letters

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×