We are pleased to announce a seminar by Prof. Jason Evans.
* Title: Naturalizing Supersymmetry with aTwo-Field Relaxion Mechanism
* Speaker: Jason Evans(KIAS)
* Date: 3:00 pm, April 27 2016
* Place: CTPU Seminar Room, KAIST Munji Campus
* Abstract: We present a supersymmetric version of a two- eld relaxion model that naturalizes tuned versions of supersymmetry. This arises from a relaxion mechanism that does not depend on QCD dynamics and where the relaxion potential barrier height is controlled by a second axion-like eld. During the cosmological evolution, the relaxion rolls with a nonzero value that breaks supersymmetry and scans the soft supersymmetric mass terms. Electroweak symmetry is broken after the soft masses become of order the supersymmetric Higgs mass term and causes the relaxion to stop rolling for superpartner masses up to 10^9 GeV. This can explain the tuning in supersymmetric models, including split-SUSY models, while preserving the QCD axion solution to the strong CP problem. Besides predicting two very weakly-coupled axion-like particles, the supersymmetric spectrum may contain an extra Goldstino, which could be a viable dark matter candidate.
We look forward to your participation in the seminar.