Higgs boson mass and electroweak observables in the MRSSM

TL;DR

This paper performs a detailed next-to-leading order analysis of the Higgs and W boson masses, and muon decay within the MRSSM, highlighting its ability to match experimental data without stop mixing.

Contribution

It provides the first comprehensive NLO computation of key electroweak observables in the MRSSM, including new contributions from non-MSSM particles.

Findings

The MRSSM can fit measured Higgs and W boson masses with ~1 TeV stop masses.

Significant tree-level and one-loop contributions from new particles are identified.

Benchmark points satisfy current experimental constraints.

Abstract

R-symmetry is a fundamental symmetry which can solve the SUSY flavor problem and relax the search limits on SUSY masses. Here we provide a complete next-to-leading order computation and discussion of the lightest Higgs boson mass, the W boson mass and muon decay in the minimal R-symmetric SUSY model (MRSSM). This model contains non-MSSM particles including a Higgs triplet, Dirac gauginos and higgsinos, and leads to significant new tree-level and one-loop contributions to these observables. We show that the model can accommodate the measured values of the observables for interesting regions of parameter space with stop masses of order 1 TeV in spite of the absence of stop mixing. We characterize these regions and provide typical benchmark points, which are also checked against further experimental constraints. A detailed exposition of the model, its mass matrices and its Feynman rules relevant for computations in this paper is also provided.