Work

Cosmological constraints on theories with large extra dimensions

Year: 1999

Type: article

Abstract: In theories with large extra dimensions, constraints from cosmology lead to nontrivial lower bounds on the gravitational scale M, corresponding to upper bounds on the radii of the compact extra dimensions. These constraints are especially relevant to the case of two extra dimensions, since only if M is 10 TeV or less do deviations from the standard gravitational force law become evident at distances accessible to planned submillimeter gravity experiments. By examining the graviton decay contribution to the cosmic diffuse gamma radiation, we derive, for the case of two extra dimensions, a conservative bound $M>110\mathrm{TeV},$ corresponding to ${r}_{2}<5.1\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}5}\mathrm{mm},$ well beyond the reach of these experiments. We also consider the constraint coming from graviton overclosure of the universe and derive an independent bound $M>6.5/\sqrt{h}\mathrm{TeV}$ or ${r}_{2}<0.015h\mathrm{mm}.$

Source: Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields

DOI: 10.1103/physrevd.60.085008

Authors: Lawrence J. Hall, David Smith

Institutions: Lawrence Berkeley National Laboratory, University of California, Berkeley

Language: English

Topic: Cosmology and Gravitation Theories

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: National Science Foundation, U.S. Department of Energy

Awards: G1643223109, G193590374