Speaker
Dr
Masato Arai
(Czech Techinical University in Prague)
Description
We investigate renormalization effects on the low energy mass spectrum of the minimal supersymmetric standard model (MSSM), using a calculable model of spontaneous supersymmetry breaking in the hidden sector. We model the hidden sector by N=2 supersymmetric quantum chromodynamics with gauge group SU(2)xU(1) and N_f=2 matter hypermultiplets, perturbed by a Fayet-Iliopoulos term which breaks the supersymmetry down to N=0 on meta-stable vacua in a controllable manner. The hidden sector Kahler metric is renormalized, contributing to the MSSM renormalization group flows via gauge mediation. It is found that the MSSM soft scalar masses can be made larger or smaller due to the hidden sector renormalisation effects, depending on how the hidden sector fields are coupled to the messenger fields. This model provides a concrete example in which strongly coupled hidden sector dynamics is related to the low energy spectrum of MSSM particles that are expected to be accessible in collider experiments.
Primary author
Dr
Masato Arai
(Czech Techinical University in Prague)
