Reconcile muon g-2 anomaly with LHC data in SUGRA with generalized gravity mediation

TL;DR

This paper proposes a SUGRA model with non-universal gaugino masses, where a heavy gluino at the GUT scale leads to a spectrum that explains the muon g-2 anomaly, satisfies collider constraints, and predicts light neutralino dark matter.

Contribution

It introduces a novel non-universal gaugino mass scenario within SU(5) GUT that naturally explains muon g-2 and collider data simultaneously.

Findings

Heavy gluino at GUT scale results in light uncolored sparticles.

Muon g-2 anomaly explained with neutralino dark matter lighter than 200 GeV.

Model predictions are testable by future Xenon1T dark matter experiments.

Abstract

From generalized gravity mediation we build a SUGRA scenario in which the gluino is much heavier than the electroweak gauginos at the GUT scale. We find that such a non-universal gaugino scenario with very heavy gluino at the GUT scale can be naturally obtained with proper high dimensional operators in the framework of SU(5) GUT. Then, due to the effects of heavy gluino, at the weak scale all colored sparticles are heavy while the uncolored sparticles are light, which can explain the Brookhaven muon g-2 measurement while satisfying the collider constraints (both the 125 GeV Higgs mass and the direct search limits of sparticles) and dark matter requirements. We also find that, in order to explain the muon g-2 measurement, the neutralino dark matter is lighter than 200 GeV in our scenario, which can be mostly covered by the future Xenon1T experiment.