Large tensor-to-scalar ratio from Composite Inflation
arXiv:1404.5879 · doi:10.1103/PhysRevD.90.047303
Abstract
The claimed detection of the BICEP2 experiment on the primordial B-mode of cosmic microwave background polarization suggests that cosmic inflation possibly takes place at the energy around the grand unified theory scale given a constraint on the tensor-to-scalar ratio. i.e., . In this report, we revisit single-field (slow-roll) composite inflation and show that, with the proper choice of parameters and sizeable number of e-foldings, a large tensor-to-scalar ratio consistent with the recent BICEP2 results can be significantly produced with regard to the composite paradigms.
v3, 5 pages, 3 figures. text modified, misprints corrected, version matches the one accepted for publication by PRD. arXiv admin note: text overlap with arXiv:1307.2880
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