MCTP HET BROWN BAG SEMINAR
Perturbative Unitarity Constraints on a Supersymmetric Higgs Portal


Sep
10
2014

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  • Speaker: Sonia El Hedri (SLAC)
  • Host Department: Physics
  • Date: 09/10/2014
  • Time: 12:00 PM - 1:00 PM

  • Location: 3481 Randall Lab

  • Description:

    We place perturbative unitarity constraints on both the dimensionful and dimensionless couplings in the Next-to-Minimal Supersymmetric Standard Model Higgs Sector. These constraints, plus the requirement that the singlino and/or Higgsino constitutes at least part of the observed dark matter relic abundance, generate upper bounds on the Higgs and neutralino/chargino mass spectrum. We obtain an upper bound of 12 TeV for the charginos and neutralinos and 20 TeV for the heavy Higgses outside defined fine-tuned regions. By using the NMSSM as a template, we describe a method which replaces naturalness arguments with more rigorous perturbative unitarity arguments to get a better understanding of when new physics will appear.


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