125 GeV Higgs boson mass and muon g-2 in 5D MSSM

TL;DR

This paper explores a 5D MSSM framework with warped geometry to naturally generate the required sparticle mass hierarchy, successfully explaining the 125 GeV Higgs mass and muon g-2 anomaly while providing testable LHC predictions.

Contribution

It introduces a 5D warped MSSM model where geometry naturally achieves the necessary mass hierarchy to resolve Higgs and muon g-2 tensions, with phenomenological implications.

Findings

Reproduces 125 GeV Higgs mass and muon g-2 within the model

Predicts specific sparticle mass spectra for LHC Run-2

Achieves natural mass hierarchy via geometric setup

Abstract

In the MSSM, the tension between the observed Higgs boson mass and the experimental result of the muon $g-2$ measurement requires a large mass splitting between stops and smuons/charginos/neutralinos. We consider a 5-dimensional (5D) framework of the MSSM with the Randall-Sundrum warped background metric, and show that such a mass hierarchy is naturally achieved in terms of geometry. In our setup, the supersymmetry is broken at the ultraviolet (UV) brane, while all the MSSM multiplets reside in the 5D bulk. An appropriate choice of the bulk mass parameters for the MSSM matter multiplets can naturally realize the sparticle mass hierarchy desired to resolve the tension. Gravitino is localized at the UV brane and hence becomes very heavy, while the gauginos spreading over the bulk acquire their masses suppressed by the 5th dimensional volume. As a result, the LSP neutralino is a candidate for the dark matter as usual in the MSSM. In addition to reproducing the SM-like Higgs boson mass of around 125 GeV and the measured value of the muon $g-2$, we consider a variety of phenomenological constraints, and present the benchmark particle mass spectra which can be explored at the LHC Run-2 in the near future.