Renormalization effects on the MSSM from a calculable model of a strongly coupled hidden sector

TL;DR

This paper explores how strongly coupled hidden sector dynamics, modeled via N=2 supersymmetric QCD, can significantly influence the low-energy MSSM spectrum through renormalization effects, with implications for collider phenomenology.

Contribution

It introduces a calculable strongly coupled hidden sector model using Seiberg-Witten theory to analyze its impact on MSSM renormalization group flows and soft mass spectrum.

Findings

Hidden sector renormalization affects MSSM scalar masses.

Intricate effects depend on coupling to messenger fields.

Provides a concrete strongly coupled model for collider predictions.

Abstract

We investigate possible renormalization effects on the low-energy mass spectrum of the minimal supersymmetric standard model (MSSM), using a calculable model of strongly coupled hidden sector. We model the hidden sector by N=2 supersymmetric quantum chromodynamics with gauge group SU(2) x U(1) and N_f=2 matter hypermultiplets, perturbed by a Fayet-Iliopoulos term which breaks the supersymmetry down to N=0 on a metastable vacuum. In the hidden sector the Kahler potential is renormalized. Upon identifying a hidden sector modulus with the renormalization scale, and extrapolating to the strongly coupled regime using the Seiberg-Witten solution, the contribution from the hidden sector to the MSSM renormalization group flows is computed. For concreteness, we consider a model in which the renormalization effects are communicated to the MSSM sector via gauge mediation. In contrast to the perturbative toy examples of hidden sector renormalization studied in the literature, we find that our strongly coupled model exhibits rather intricate effects on the MSSM soft scalar mass spectrum, depending on how the hidden sector fields are coupled to the messenger fields. This model provides a concrete example in which the low-energy spectrum of MSSM particles that are expected to be accessible in collider experiments is obtained using strongly coupled hidden sector dynamics.