Anatomy of maximal stop mixing in the MSSM

TL;DR

This paper explores the maximal stop mixing scenario in the MSSM, analyzing its feasibility within GUT models and specific SUSY breaking mechanisms to understand how it can produce the observed Higgs mass.

Contribution

It provides a detailed analysis of the constraints on GUT-scale soft terms for realizing maximal stop mixing in the MSSM and compares different SUSY breaking mediation mechanisms.

Findings

Constraints on GUT-scale soft terms for maximal mixing

Gaugino mediation and gravity mediation scenarios analyzed

Potential for realizing 125 GeV Higgs with specific SUSY breaking mechanisms

Abstract

A Standard Model-like Higgs near 125 GeV in the MSSM requires multi-TeV stop masses, or a near-maximal contribution to its mass from stop mixing. We investigate the maximal mixing scenario, and in particular its prospects for being realized it in potentially realistic GUT models. We work out constraints on the possible GUT-scale soft terms, which we compare with what can be obtained from some well-known mechanisms of SUSY breaking mediation. Finally, we analyze two promising scenarios in detail, namely gaugino mediation and gravity mediation with non-universal Higgs masses.