Effective Planck mass and the scale of inflation

Matthew Kleban, Mehrdad Mirbabayi, Massimo Porrati

    Research output: Contribution to journalArticlepeer-review


    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.

    Original languageEnglish (US)
    Article number017
    JournalJournal of Cosmology and Astroparticle Physics
    Issue number1
    StatePublished - Jan 11 2016


    • cosmological parameters from CMBR
    • gravitational waves and CMBR polarization
    • inflation
    • modified gravity

    ASJC Scopus subject areas

    • Astronomy and Astrophysics


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