paper

Measuring a Parity Violation Signature in the Early Universe via Ground-based Laser Interferometers

arXiv:0707.0535 · doi:10.1103/PhysRevLett.99.121101

Abstract

We show that pairs of widely separated interferometers are advantageous for measuring the Stokes parameter V of a stochastic background of gravitational waves. This parameter characterizes asymmetry of amplitudes of right- and left-handed waves and generation of the asymmetry is closely related to parity violation in the early universe. The advantageous pairs include LIGO(Livingston)-LCGT and AIGO-Virgo that are relatively insensitive to Omega_GW (the simple intensity of the background). Using at least three detectors, information of the intensity Omega_GW and the degree of asymmetry V can be separately measured.

6 pages, 3 figures, accepted for publication in PRL

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