Soft Supersymmetry Breaking

by D.R.T. JONES (University of Liverpool)

Thursday 12 Aug 1999, 14:00 → 14:15 Europe/Zurich

TH Auditorium (CERN)

Exact results for the soft supersymmetry breaking b-functions are reviewed, and used to derive ('bottom-up') the superconformal anomaly-inspired results for the soft parameters, and a distinct RG-invariant solution for the finite case. Classes of soft masses and interactions that are not usually considered, both in general and in the MSSM context are explored. Preliminary results for the effect on the sparticle spectrum of such theories are presented. A new class of (at least) one-loop finite theories is constructed. The infra-red stability of fixed points in the evolution of the Yukawa couplings, A-parameters and soft masses is investigated. In a wide range of physically interesting theories it is shown that, in the asymptotically free case, the existence of stable IR fixed points for the Yukawa couplings implies stable IR fixed points for the A parameters and soft masses.