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Journal Article

Accessibility of the Pre-Big-Bang Models to LIGO


Buonanno,  Alessandra
Astrophysical and Cosmological Relativity, AEI-Golm, MPI for Gravitational Physics, Max Planck Society;
Department of Physics, University of Maryland;

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Mandic, V., & Buonanno, A. (2006). Accessibility of the Pre-Big-Bang Models to LIGO. Physical Review D, 73: 063008. doi:10.1103/PhysRevD.73.063008.

Cite as: http://hdl.handle.net/11858/00-001M-0000-0018-D81A-D
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 diffcult 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.