Scales of gravity

Gia Dvali, Gregory Gabadadze, Marko Kolanović, Francesco Nitti

    Research output: Contribution to journalArticle

    Abstract

    We propose a framework in which the quantum gravity scale can be as low as 10 -3 eV. The key assumption is that the standard model ultraviolet cutoff is much higher than the quantum gravity scale. This ensures that we observe conventional weak gravity. We construct an explicit brane-world model in which the brane-localized s standard model is coupled to strong 5D gravity of infinite-volume flat extra space. Because of the high ultraviolet scale, the standard model fields generate a large graviton kinetic term on the brane. This kinetic term "shields" the standard model from the strong bulk gravity. As a result, an observer on the brane sees weak 4D gravity up to astronomically large distances beyond which gravity becomes five dimensional. Modeling quantum gravity above its scale by the closed string spectrum we show that the shielding phenomenon protects the standard model from an apparent phenomenological catastrophe due to the exponentially large number of light string states. The collider experiments, astrophysics, cosmology and gravity measurements independently point to the same lower bound on the quantum gravity scale, 10 -3 eV. For this value the model has experimental signatures both for colliders and for submillimeter gravity measurements. Black holes reveal certain interesting properties in this framework.

    Original languageEnglish (US)
    Article number024031
    JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
    Volume65
    Issue number2
    DOIs
    StatePublished - 2002

    Fingerprint

    Gravity
    gravitation
    Quantum Gravity
    Standard Model
    Branes
    Ultraviolet
    Strings
    Kinetics
    Brane World
    Catastrophe
    Astrophysics
    Term
    Cosmology
    strings
    Black Holes
    Observer
    Signature
    gravitons
    kinetics
    Lower bound

    ASJC Scopus subject areas

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

    Cite this

    Dvali, G., Gabadadze, G., Kolanović, M., & Nitti, F. (2002). Scales of gravity. Physical Review D - Particles, Fields, Gravitation and Cosmology, 65(2), [024031]. https://doi.org/10.1103/PhysRevD.65.024031

    Scales of gravity. / Dvali, Gia; Gabadadze, Gregory; Kolanović, Marko; Nitti, Francesco.

    In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 65, No. 2, 024031, 2002.

    Research output: Contribution to journalArticle

    Dvali, G, Gabadadze, G, Kolanović, M & Nitti, F 2002, 'Scales of gravity', Physical Review D - Particles, Fields, Gravitation and Cosmology, vol. 65, no. 2, 024031. https://doi.org/10.1103/PhysRevD.65.024031
    Dvali, Gia ; Gabadadze, Gregory ; Kolanović, Marko ; Nitti, Francesco. / Scales of gravity. In: Physical Review D - Particles, Fields, Gravitation and Cosmology. 2002 ; Vol. 65, No. 2.
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