Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2010-07-15
JHEP 1010:102,2010
Physics
High Energy Physics
High Energy Physics - Phenomenology
Discussion of brane tension effects substantially revised. Main physical conclusions unchanged. Latex, 20 pages
Scientific paper
10.1007/JHEP10(2010)102
In warped models that solve the hierarchy problem, there is generally no dynamical relation between the size of the fifth dimension and the scale of electroweak symmetry breaking (EWSB). The establishment of such a relation, without fine-tuning, requires that Casimir contributions to the radion potential not exceed the energy density associated with EWSB. Here, we examine the use of supersymmetry for controlling the Casimir energy density and making quantum contributions calculable. We compute the effects of supersymmetry breaking at the UV and IR boundaries of warped backgrounds, in the presence of brane localized kinetic terms. Various limits of supersymmetry breaking are examined. We find that when supersymmetry is broken on the UV brane, vacuum contributions to the radion potential can be controlled (as likely necessary for EWSB to govern the radion potential) via small soft masses as well as a "double volume suppression." Our formalism can also provide a setup for radion stabilization by bulk fields, when supersymmetry is broken on both the UV and the IR branes.
Davoudiasl Hooman
Ponton Eduardo
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