The supersymmetric flavour problem in 5D GUTs and its consequences for LHC phenomenology
arXiv:1109.1226 · doi:10.1007/JHEP12(2011)061
Abstract
We study supersymmetric models with a GUT-sized extra dimension, where both the Higgs fields and the SUSY breaking hidden sector are localized on a 4D brane. Exponential wave function profiles of the matter fields give rise to hierarchical structures in the Yukawa couplings and soft terms. Such structures can naturally explain hierarchical fermion masses and mixings, while at the same time alleviating the supersymmetric flavour problem. We discuss two sources of supersymmetry breaking, radion mediation and brane fields, and perform a detailed numerical analysis, thoroughly taking into account the proliferation of unknown O(1) coefficients that occurs in this class of models. It turns out that additional assumptions on supersymmetry breaking are necessary to evade the stringent experimental bounds on lepton flavour violation. The favourable regions of parameter space are then examined with regards to their LHC phenomenology. They generically feature heavy gluinos and squarks beyond current bounds. Lepton flavour violation in SUSY cascade decays can give interesting signatures.
43 pages, 12 figures. Version accepted for publication in JHEP
References in corpus (14)
- MadGraph 5 : Going Beyond
- Primordial Nucleosynthesis: from precision cosmology to fundamental physics
- Flavor Physics in the Randall-Sundrum Model: I. Theoretical Setup and Electroweak Precision Tests
- De Sitter Vacua from Matter Superpotentials
- Locally stable non-supersymmetric Minkowski vacua in supergravity
- Unification and Fermion Mass Structure
- Search for Heavy Stable Charged Particles in pp collisions at sqrt(s)=7 TeV
- SUSY breaking mediation by throat fields
- Holographic Grand Unification
- Flavorful Supersymmetry from Higher Dimensions
- Flavour in supersymmetry: horizontal symmetries or wave function renormalisation
- Inducing the mu and the B mu Term by the Radion and the 5d Chern-Simons Term
- Footprints of SUSY GUTs in Flavour Physics
- Using the e^{+/-} mu^{-/+} + E^{miss}_T signature in the search for supersymmetry and lepton flavour violation in neutralino decays