Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2006-04-26
Phys.Lett. B643 (2006) 348-353
Physics
High Energy Physics
High Energy Physics - Theory
4 pages, No figures, Revtex
Scientific paper
10.1016/j.physletb.2006.11.014
The stability problem of Randall-Sundrum braneworld is readdressed in the light of stabilizing bulk scalar fields. It is shown that in such scenario the instability persists because of back-reaction even when an arbitrary potential is introduced for a canonical scalar field in the bulk. It is further shown that a bulk scalar field can indeed stabilize the braneworld when it has a tachyon-like action. The full back-reacted metric in such model is derived and a proper resolution of the hierarchy problem (for which the Randall Sundrum scenario was originally proposed) is found to exist by suitable adjustments of the parameters of the scalar potential.
Maity Debaprasad
SenGupta Soumitra
Sur Sourav
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