DT1: Flavour physics in extra dimensions with non-factorizable metric
Models of extra spatial dimension and non-factorizable metric [1, 2] solve a multitude of conceptual problems of the standard model. It simply explains for example the gauge hierarchy problem which is the unnaturally large difference between the electroweak and the Planck scale, by an exponential deformation due to the metric. Scenarios with fermions which are separately localized along extra spatial dimensions (split fermion scenarios) [3] are promising candidates to describe physics beyond the standard model. These models have in addition a diverse and amazing flavour structure. A large number of flavour violating observable should be investigated which partially appear already at tree level. Particularly interesting are Δ F=2 processes, this is doubly flavour changing processes, and rare K and B decays. A large collection and quantitative analyses of possible flavour violating effects like the mixing between standard model and Kaluza-Klein modes or deformations of standard model modes are still missing. For later steps of these investigations the focus should be on gauge Higgs unified models where the Higgs boson follows from an extra dimensional component of the gauge field.
References:
Models of extra spatial dimension and non-factorizable metric [1, 2] solve a multitude of conceptual problems of the standard model. It simply explains for example the gauge hierarchy problem which is the unnaturally large difference between the electroweak and the Planck scale, by an exponential deformation due to the metric. Scenarios with fermions which are separately localized along extra spatial dimensions (split fermion scenarios) [3] are promising candidates to describe physics beyond the standard model. These models have in addition a diverse and amazing flavour structure. A large number of flavour violating observable should be investigated which partially appear already at tree level. Particularly interesting are Δ F=2 processes, this is doubly flavour changing processes, and rare K and B decays. A large collection and quantitative analyses of possible flavour violating effects like the mixing between standard model and Kaluza-Klein modes or deformations of standard model modes are still missing. For later steps of these investigations the focus should be on gauge Higgs unified models where the Higgs boson follows from an extra dimensional component of the gauge field.
References:
- L. Randall and R. Sundrum,
Phys. Rev. Lett. 83 (1999) 4690, hep-th/9906064. - L. Randall and R. Sundrum,
Phys. Rev. Lett. 83 (1999) 3370, hep-ph/9905221. - N. Arkani-Hamed and M. Schmaltz,
Phys. Rev. D61 (2000) 033005, hep-ph/9903417.
