Degravitation of the cosmological constant and graviton width

Gia Dvali, Stefan Hofmann, Justin Khoury

    Research output: Contribution to journalArticle

    Abstract

    We study the possibility of decoupling gravity from the vacuum energy. This is effectively equivalent to promoting Newton's constant to a high-pass filter that degravitates sources of characteristic wavelength larger than a certain macroscopic (super) horizon scale L. We study the underlying physics and the consistency of this phenomenon. In particular, the absence of ghosts, already at the linear level, implies that in any such theory the graviton should either have a mass 1/L, or be a resonance of similar width. This has profound physical implications for the degravitation idea.

    Original languageEnglish (US)
    Article number084006
    JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
    Volume76
    Issue number8
    DOIs
    StatePublished - Oct 9 2007

    Fingerprint

    high pass filters
    gravitons
    Cosmological Constant
    ghosts
    Decoupling
    decoupling
    newton
    horizon
    Horizon
    Gravity
    Vacuum
    Physics
    Wavelength
    Filter
    gravitation
    Imply
    vacuum
    physics
    Energy
    wavelengths

    ASJC Scopus subject areas

    • Physics and Astronomy(all)
    • Nuclear and High Energy Physics
    • Mathematical Physics

    Cite this

    Degravitation of the cosmological constant and graviton width. / Dvali, Gia; Hofmann, Stefan; Khoury, Justin.

    In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 76, No. 8, 084006, 09.10.2007.

    Research output: Contribution to journalArticle

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