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Self-gravity of brane worlds: a new hierarchy twist

Charmousis, C.; Emparan, R.; Gregory, R.

Authors

C. Charmousis

R. Emparan

R. Gregory



Abstract

We examine the inclusion of brane self-gravity in brane-world scenarios with three or more compact extra dimensions. If the brane is a thin, localized one, then we find that the geometry in its vicinity is warped in such a way that gravity on the brane can become very weak, independently of the volume of the extra dimensions. As a consequence, self-gravity can make the brane structure enter into the determination of the hierarchy between the Planck scale and a lower fundamental scale. In an extreme case, one can obtain a novel reformulation of the hierarchy problem in brane worlds, without the need for large-size extra dimensions; the hierarchy would be generated when the ratio between the scales of brane tension and brane thickness is large. In a sense, such a scenario is half-way between the one of Arkani-Hamed et al. (ADD) (although with TeV-mass Kaluza-Klein states) and that of Randall and Sundrum (RS1) (but with only a TeV brane, and of positive tension). We discuss in detail the propagation of fields in the background of this geometry, and find that no problems appear even if the brane is taken to be very thin. We also discuss the presence of black branes and black holes in this setting, and the possibility of having a Planck brane.

Citation

Charmousis, C., Emparan, R., & Gregory, R. (2001). Self-gravity of brane worlds: a new hierarchy twist. Journal of High Energy Physics, 2001(05), https://doi.org/10.1088/1126-6708/2001/05/026

Journal Article Type Article
Publication Date May 1, 2001
Deposit Date May 8, 2008
Publicly Available Date Mar 28, 2024
Journal Journal of High Energy Physics
Print ISSN 1126-6708
Electronic ISSN 1029-8479
Publisher Scuola Internazionale Superiore di Studi Avanzati (SISSA)
Peer Reviewed Peer Reviewed
Volume 2001
Issue 05
DOI https://doi.org/10.1088/1126-6708/2001/05/026
Keywords Black-holes, P-branes, Dimensions, Compactification, Millimeter, Space.

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