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Related Experiment Videos

Infinitely large new dimensions

Arkani-Hamed1, Dimopoulos, Dvali

  • 1Department of Physics, University of California, Berkeley, California 94530 and Theory Group, Lawrence Berkeley National Laboratory, Berkeley, California 94530, USA.

Physical Review Letters
|October 4, 2000
PubMed
Summary
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Researchers explored intersecting brane models in anti-de Sitter space to trap gravity in extra dimensions. This work generalizes gravity localization and offers new theories for quantum gravity and deviations from Newton

Area of Science:

  • Theoretical Physics
  • High Energy Physics
  • String Theory

Background:

  • Investigating gravity localization in higher-dimensional spacetimes is crucial for unifying fundamental forces.
  • Previous models often focused on specific numbers of extra dimensions or lacked mechanisms for gravity localization.

Purpose of the Study:

  • To generalize the concept of gravity trapping to any number 'n' of infinite extra dimensions using intersecting brane configurations.
  • To explore the phenomenological consequences of such models, particularly concerning quantum gravity and deviations from Newtonian gravity.

Main Methods:

  • Construction of intersecting brane configurations within anti-de Sitter (AdS) space.
  • Analysis of the relationship between the 4D Planck scale (M(Pl)), the fundamental Planck scale (M(*)), and the AdS radius (L).

Related Experiment Videos

  • Examination of two distinct theoretical scenarios arising from this framework.

    • Main Results:

    • Gravity can be localized to the intersection region of branes in 'n' infinite extra dimensions.
    • Two classes of theories emerge: one with TeV scale quantum gravity and submillimeter deviations from Newton's law, and another with an exponential determination of the weak/Planck hierarchy.
    • The phenomenology of large extra dimensions is recovered when M(*) is TeV and L is submillimeter.

    Conclusions:

    • Intersecting brane configurations provide a viable mechanism for gravity localization in higher dimensions.
    • These models offer testable predictions for quantum gravity at the TeV scale and modifications to gravity at short distances.
    • The framework allows for an exponential explanation of the weak/Planck hierarchy under specific parameter choices.