Special Pheno & Vino Seminar, Nima Arkani-Hamed, IAS, "A Nnew, Cosmological Solution of the Hierarchy Problem"

Thu, Nov 10, 2016, 1:00 pm to 2:30 pm
Jadwin 303
In this talk I will describe a new solution to the hierarchy problem, "Nnaturalness". Introducing a large N copies of the Standard Model with varying values of the Higgs mass parameter allows the lightest of these sectors to have a weak scale parametrically lighter than the cutoff. If we assume that the early universe is dominated by a "reheaton" particle with democratic couplings to all sectors, simple dimensional arguments show that the sector with smallest weak scale is primarily populated by reheaton decay. Current and near-future cosmological observations should explore much of the natural parameter space of this model. Furthermore, supersymmetric implementations of these ideas which preserve grand unification predict superpartners with mass below mW × Mpl/MGUT ∼ 10 TeV, accessible to future 100 TeV colliders.