Bounds on generic high-energy physics modifications to the primordial power spectrum from back-reaction on the metric

M. Porrati

    Research output: Contribution to journalArticle

    Abstract

    Modifications to the primordial power spectrum of inflationary density perturbations have been studied recently using a boundary effective field theory approach. In the approximation of a fluctuating quantum field on a fixed background, the generic effect of new physics is encoded in parameters of order H/M. Here, we point out that the back-reaction on the metric can be neglected only when these parameters obey certain bounds that may put them beyond the reach of observation.

    Original languageEnglish (US)
    Pages (from-to)306-310
    Number of pages5
    JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
    Volume596
    Issue number3-4
    DOIs
    StatePublished - Aug 26 2004

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    power spectra
    physics
    perturbation
    energy
    approximation

    ASJC Scopus subject areas

    • Nuclear and High Energy Physics

    Cite this

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    abstract = "Modifications to the primordial power spectrum of inflationary density perturbations have been studied recently using a boundary effective field theory approach. In the approximation of a fluctuating quantum field on a fixed background, the generic effect of new physics is encoded in parameters of order H/M. Here, we point out that the back-reaction on the metric can be neglected only when these parameters obey certain bounds that may put them beyond the reach of observation.",
    author = "M. Porrati",
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