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Accessibility of the pre-big-bang models to LIGO

Mandic, Vuk and Buonanno, Alessandra (2006) Accessibility of the pre-big-bang models to LIGO. Physical Review D, 73 (6). Art. No. 063008. ISSN 2470-0010. doi:10.1103/PhysRevD.73.063008.

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The 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 current and future LIGO results on pre-big-bang models of the early Universe, determining the exclusion regions in the parameter space of the minimal pre-big-bang scenario. Although the current LIGO reach is still weaker than the indirect bound from big bang nucleosynthesis, future runs by LIGO, in the coming year, and by Advanced LIGO (~2009) should further constrain the parameter space, and in some parts surpass the Big Bang nucleosynthesis bound. It will be more difficult to constrain the parameter space in nonminimal 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.

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Additional Information:©2006 The American Physical Society. Received 12 October 2005; published 17 March 2006. The authors thank Albert Lazzarini, Joe Romano, and Stan Whitcomb for many useful discussions, Maurizio Gasperini for useful comments, and the LIGO Scientific Collaboration for making this study possible. V. M.’s work was supported by the NSF Cooperative Agreement No. PHY-0107417.
Issue or Number:6
Record Number:CaltechAUTHORS:MANprd06
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:3424
Deposited By: Lindsay Cleary
Deposited On:07 Jun 2006
Last Modified:08 Nov 2021 19:55

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