Scalar-tensor correlations and large-scale power suppression
| Autor: | J. P. Zibin |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: |
Physics
High Energy Physics - Theory Nuclear and High Energy Physics Cosmology and Nongalactic Astrophysics (astro-ph.CO) Gravitational wave Scalar (mathematics) Cosmic microwave background FOS: Physical sciences Lambda-CDM model Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics Amplitude High Energy Physics - Theory (hep-th) Quantum electrodynamics Observational cosmology Tensor Anisotropy Astrophysics - Cosmology and Nongalactic Astrophysics |
| Popis: | Recent measurements from the BICEP2 cosmic microwave background polarization experiment indicate the presence of primordial gravitational waves with surprisingly large amplitude. If these results are confirmed, they point to a discrepancy with temperature anisotropy power spectrum measurements and suggest that extensions to the standard cosmological model may be required to resolve the discrepancy. One intriguing extension is an anticorrelation between tensors and scalars to naturally suppress the temperature power. Here I examine this possibility and show that such a suppression is not possible in the presence of a general form of anticorrelation. 5 pages, references added, minor typos corrected; version published in Phys. Rev. D |
| Databáze: | OpenAIRE |
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