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Accessibility of the Pre-Big-Bang Models to LIGO

By V. Mandic and A. Buonanno

Abstract

7 pages, 8 figuresThe recent search for a stochastic background of gravitational waves with LIGO interferometers has produced a new upper bound on the amplitude of this background in the 100 Hz region. We investigate the implications of the LIGO result on pre-Big-Bang models of the early Universe. We find that in the minimal pre-Big-Bang scenario, LIGO is already beginning to explore interesting regions of the parameter space, although its reach is still weaker than the indirect bound from Big-Bang nucleosynthesis. Future searches by LIGO, in the coming year, and by Advanced LIGO (2009) should further constrain the parameter space, and in some parts even surpass the Big-Bang nucleosynthesis bound. It will be more difficult to constrain the parameter space in non-minimal pre-Big-Bang models, which are characterized by multiple cosmological phases in the yet not well understood stringy phase, and where the higher-order curvature and/or quantum-loop corrections in the string effective action should be included

Topics: 95.85.Sz, 04.80.Nn, 98.80.Cq, 98.70Vc, 11.25.Db, [PHYS.ASTR.CO] Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO]
Publisher: American Physical Society
Year: 2006
DOI identifier: 10.1103/PhysRevD.73.063008
OAI identifier: oai:HAL:in2p3-00025117v1
Provided by: Hal-Diderot
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