Accessibility of the pre-big-bang models to ligo
Oct, 20057 pages
Published in:
- Phys.Rev.D 73 (2006) 063008
e-Print:
- astro-ph/0510341 [astro-ph]
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Abstract: (arXiv)
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.- 98.70.Vc
- 04.80.Nn
- 98.80.Cq
- 95.85.Sz
- gravitational radiation
- background: stochastic
- LIGO
- cosmological model
- effective action: string
- correction: higher-order
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