A to Z of the Muon Anomalous Magnetic Moment in the MSSM with Pati-Salam at the GUT scale

TL;DR

This paper presents a supersymmetric GUT model based on Pati-Salam and family symmetries that successfully explains the muon g-2 anomaly, dark matter, and collider observations, predicting testable particle properties.

Contribution

It introduces a novel GUT-scale MSSM framework with family symmetry constraints that resolves the muon g-2 discrepancy and aligns with collider and dark matter data.

Findings

Resolves the muon g-2 anomaly within 3σ of experimental value

Predicts light smuons and neutralinos consistent with collider signals

Identifies parameter space regions explaining dark matter and di-lepton excesses

Abstract

We analyse the low energy predictions of the minimal supersymmetric standard model (MSSM) arising from a GUT scale Pati-Salam gauge group further constrained by an $A_4 \times Z_5$ family symmetry, resulting in four soft scalar masses at the GUT scale: one left-handed soft mass $m_0$ and three right-handed soft masses $m_1,m_2,m_3$, one for each generation. We demonstrate that this model, which was initially developed to describe the neutrino sector, can explain collider and non-collider measurements such as the dark matter relic density, the Higgs boson mass and, in particular, the anomalous magnetic moment of the muon $(g-2)_\mu$. Since about two decades, $(g-2)_\mu$ suffers a puzzling about 3$\,\sigma$ excess of the experimentally measured value over the theoretical prediction, which our model is able to fully resolve. As the consequence of this resolution, our model predicts specific regions of the parameter space with the specific properties including light smuons and neutralinos, which could also potentially explain di-lepton excesses observed by CMS and ATLAS.