**Authors**: Emanuele Berti, Leonardo Gualtieri, Michael Horbatsch, Justin Alsing

**Date**: 19 Apr 2012

**Abstract**: Scalar-tensor theories are among the simplest extensions of general relativity. In theories with light scalars, deviations from Einstein's theory of gravity are determined by the scalar mass m_s and by a Brans-Dicke-like coupling parameter \omega_{BD}. We show that gravitational-wave observations of nonspinning neutron star-black hole binary inspirals can be used to set upper bounds on the combination m_s/\sqrt{\omega_{BD}}. We estimate via a Fisher matrix analysis that individual observations with signal-to-noise ratio \rho would yield (m_s/\sqrt{\omega_{\rm BD}})(\rho/10)\lesssim 10ˆ{-15}, 10ˆ{-16} and 10ˆ{-19} eV for Advanced LIGO, ET and eLISA, respectively. A statistical combination of multiple observations may further improve this bound.

1204.4340
(/preprints)

2012-05-18, 18:17
**[edit]**

© M. Vallisneri 2012 — last modified on 2010/01/29

*Tantum in modicis, quantum in maximis*