A recent paper argued that it is not possible to infer the energy scale of inflation from the amplitude of tensor fluctuations in the Cosmic Microwave Background, because the usual connection is substantially altered if there are a large number of universally coupled fields present during inflation, with mass less than the inflationary Hubble scale. We give a simple argument demonstrating that this is incorrect.
- cosmological parameters from CMBR
- gravitational waves and CMBR polarization
- modified gravity
ASJC Scopus subject areas
- Astronomy and Astrophysics