Naturally large tensor-to-scalar ratio in inflation
| Autor: | Kin-Wang Ng, I-Chin Wang, Guo-Chin Liu |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: |
Physics
Nuclear and High Energy Physics Particle physics Cosmology and Nongalactic Astrophysics (astro-ph.CO) Cosmic microwave background Astrophysics::Instrumentation and Methods for Astrophysics FOS: Physical sciences Astrophysics::Cosmology and Extragalactic Astrophysics Inflaton Polarization (waves) Potential energy symbols.namesake High Energy Physics - Phenomenology High Energy Physics - Phenomenology (hep-ph) Observational cosmology Quadrupole symbols Planck Anisotropy Astrophysics - Cosmology and Nongalactic Astrophysics |
| Popis: | Recently, BICEP2 measurements of the cosmic microwave background (CMB) $B$-mode polarization at degree angular scales has indicated the presence of tensor modes with a high tensor-to-scalar ratio of $r=0.2$ when assuming nearly scale-invariant tensor and scalar spectra, although the signal may be contaminated by dust emission as implied by the recent {\em Planck} polarization data. This result is in conflict with the {\em Planck} best-fit Lambda Cold Dark Model with $r 6 pages, 3 figures |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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