A Thermal Graviton Background from Extra Dimensions
arXiv:astro-ph/0503162 · doi:10.1016/j.physletb.2005.03.013
Abstract
Inflationary cosmology predicts a low-amplitude graviton background across a wide range of frequencies. This Letter shows that if one or more extra dimensions exist, the graviton background may have a thermal spectrum instead, dependent on the fundamental scale of the extra dimensions. The energy density is shown to be significant enough that it can affect nucleosynthesis in a substantial way. The possibility of direct detection of a thermal graviton background using the 21-cm hydrogen line is discussed. Alternative explanations for the creation of a thermal graviton background are also examined.
5 pages, 1 figure, requires autart.cls, to appear in Phys. Lett. B, 1 reference added
References in corpus (17)
- A Large Mass Hierarchy from a Small Extra Dimension
- An Alternative to Compactification
- Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)
- The Hierarchy Problem and New Dimensions at a Millimeter
- First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Preliminary Maps and Basic Results
- Phenomenology, Astrophysics and Cosmology of Theories with Sub-Millimeter Dimensions and TeV Scale Quantum Gravity
- 4-Year COBE DMR Cosmic Microwave Background Observations: Maps and Basic Results
- Quantum Gravity and Extra Dimensions at High-Energy Colliders
- Big Bang nucleosynthesis and physics beyond the Standard Model
- How many cosmological parameters?
- Primordial Nucleosynthesis for the New Cosmology: Determining Uncertainties and Examining Concordance
- Probing Planckian physics: resonant production of particles during inflation and features in the primordial power spectrum
- Solving the Cosmological Moduli Problem with Weak Scale Inflation
- Randall-Sundrum II Cosmology, AdS/CFT, and the Bulk Black Hole
- An Alternative to Inflation
- Inflationary Theory and Alternative Cosmology
- Transdimensional physics and inflation