Cosmic backgrounds of relic gravitons and their absolute normalization

  title={Cosmic backgrounds of relic gravitons and their absolute normalization},
  author={Massimo Giovannini},
  journal={Classical and Quantum Gravity},
  • M. Giovannini
  • Published 24 May 2014
  • Physics
  • Classical and Quantum Gravity
Provided the consistency relations are not violated, the recent BICEP2 observations pin down the absolute normalization, the spectral slope and the maximal frequency of the cosmic graviton background produced during inflation. The properly normalized spectra are hereby computed from the lowest frequencies (of the order of the present Hubble rate) up to the highest frequency range in the GHz region. Deviations from the conventional paradigm cannot be excluded and are examined by allowing for… 
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