[The University of Texas at Austin: What starts here changes the world]
Theory Group
Theory Group Special Seminar, 11 November 2016


Dr. Tim Cohen, University of Oregon

Nnaturalness

abstract

We present a new mechanism to stabilize the electroweak hierarchy. We introduce N copies of the Standard Model with varying values of the Higgs mass parameter. This generically yields a sector whose weak scale is parametrically removed from the cutoff by a factor of 1/sqrt(N). Ensuring that reheating deposits a majority of the total energy density into this lightest sector requires a modification of the standard cosmological history, providing a powerful probe of the mechanism. Current and near-future experiments will explore much of the natural parameter space. Furthermore, supersymmetric completions which preserve grand unification predict superpartners with mass below (m_W M_pl)/M_GUT ~ 10 TeV.



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