理論センター

HOME > セミナー・研究会 Seminar & Workshop > Seminar > A supersymmetric two-field relaxion model (in English)

Seminar

A supersymmetric two-field relaxion model (in English)

  • SPEAKER: Dr. Natsumi Nagata  (The University of Tokyo)
  • DATE: Nov/08 (Tue) 11:00
  • PLACE: Kenkyu Honkan 1F, Meeting Room 1 

  We discuss a supersymmetric version of a two-field relaxion model that naturalizes supersymmetric models with high SUSY-breaking. This exploits a relaxion mechanism that does not depend on QCD dynamics and where the relaxion potential barrier height is controlled by a second axion-like field. During the cosmological evolution, the relaxion rolls down 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. This can explain the tuning in supersymmetric models, while preserving the QCD axion solution to the strong CP problem. We will also consider possible inflation models compatible with this framework.