Supersymmetric Models in Light of Improved Higgs Mass Calculations

TL;DR

This paper evaluates supersymmetric models using the latest Higgs mass calculations from FeynHiggs 2.14.1, revealing significant shifts in preferred parameter spaces across various SUSY scenarios due to improved precision.

Contribution

It introduces an advanced Higgs mass prediction incorporating three-loop effects and multiple mass scales, refining SUSY parameter space analyses.

Findings

Significant shifts in SUSY parameter space preferences with improved Higgs calculations.

Enhanced accuracy in large-scale SUSY-breaking scenarios.

Minor changes in the pMSSM11 model's preferred regions.

Abstract

We discuss the parameter spaces of supersymmetry (SUSY) scenarios taking into account the improved Higgs-mass prediction provided by FeynHiggs 2.14.1. Among other improvements, this prediction incorporates three-loop renormalization-group effects and two-loop threshold corrections, and can accommodate three separate mass scales: m_{\tilde q} (for squarks), m_{\tilde g} (for gluinos) and m_{\tilde\chi} (for electroweakinos). Furthermore, it contains an improved treatment of the DRbar scalar top parameters avoiding problems with the conversion to on-shell parameters, that yields more accurate results for large SUSY-breaking scales. We first consider the CMSSM, in which the soft SUSY-breaking parameters m_0 and m_{1/2} are universal at the GUT scale, and then sub-GUT models in which universality is imposed at some lower scale. In both cases, we consider the constraints from the Higgs-boson mass M_h in the bulk of the (m_0, m_{1/2}) plane and also along stop coannihilation strips where sparticle masses may extend into the multi-TeV range. We then consider the minimal anomaly-mediated SUSY-breaking (mAMSB) scenario, in which large sparticle masses are generic. In all these scenarios the substantial improvements between the calculations of M_h in FeynHiggs 2.14.1 and FeynHiggs 2.10.0, which was used in an earlier study, change significantly the preferred portions of the models' parameter spaces. Finally, we consider the pMSSM11, in which sparticle masses may be significantly smaller and we find only small changes in the preferred regions of parameter space.