Induced brane gravity: realizations and limitations

Abstract

The induced 4d gravity on a brane world is analyzed. The case of a thick brane is considered and the unexpected appearance of a new threshold scale, much larger than the thickness scale is found. In cases of phenomenological interest, this new length scale turns out to be in the submillimeter range. The effect of $R^2$ corrections, both in the bulk and on the brane, is also studied. It is shown that they introduce new threshold scales and may induce drastic modifications to the leading behavior. A concrete string/D-brane realization of the induced gravity scenario is also presented.

20 pages; (v2) The discussion on the D-brane realization has been refined. References added (v3) Title change and minor cosmetic changes. Version that appeared on JHEP

References in corpus (4)

• Nonperturbative Continuity in Graviton Mass versus Perturbative Discontinuity
• The Power of Brane-Induced Gravity
• On models of gauge field localization on a brane
• Brane Effects on Extra Dimensional Scenarios: A Tale of Two Gravitons

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