Soft supersymmetry breaking on the brane

Abstract

We consider the low-energy description of 5D models of supergravity with boundaries comprizing a vector multiplet and the universal hypermultiplet in the bulk. We analyze the spontaneous breaking of supersymmetry induced by the vacuum expectation value of superpotentials on the boundary branes. When supersymmetry is broken, the moduli corresponding to the radion, the zero mode of the vector multiplet scalar field and the dilaton develop a potential in the effective action. We compute the resulting soft breaking terms and give some indications on the features of the corresponding particle spectrum. We consider some of the possible phenomenological implications when supersymmetry is broken on the hidden brane.

Warped Phenomenology of Higher-Derivative Gravity

“…As noted by other authors [7,10,11,12,14], it is straightforward to see that this produces the same differential equation in the bulk for the KK eigenfunctions as found in the usual RS scenario [18] and thus…”

“…[7,9,8,10,11,12,13,14]). In this paper we are interested in how the presence of the G-B term alters the detailed collider phenomenology of the RS model.…”

Searching for modified growth patterns with tomographic surveys

“…In the case of tracking-type quintessence potentials, usually considered in Chameleon scenarios, one needs small integer values of the index n ≥ O(1) in order to have the appropriate mass scale [56]. Therefore, s ∼ 2 can be seen as a typical value for Chameleon models.…”

Paths of quintessence

“…One possible loophole is if the solar system limits on the scalar coupling should not be applied to a cosmological situation because of the different spacetime backgrounds with very different scalar curvatures. This arises for example in chameleon scenarios [21]. The most stringent cosmological bounds on varying G arise from primordial nucleosynthesis and give ω −1 JBD < ∼ 3 × 10 −3 [22] (but see [23]).…”