Sparticle Spectroscopy at LHC-Run3 and LSP Dark Matter in light of Muon g-2

TL;DR

This paper explores supersymmetric models with light sleptons to explain muon g-2 results, predicts collider signatures at LHC-Run3, and discusses dark matter implications and detection prospects.

Contribution

It introduces non-universal GUT-scale models that reconcile muon g-2 with light sleptons and analyzes their collider and dark matter phenomenology.

Findings

Chargino can be probed up to 800 GeV at LHC-Run3.

Light sleptons, charginos, and neutralinos can explain muon g-2.

Heavier squarks and gluinos (>3-4 TeV) satisfy dark matter relic constraints.

Abstract

Inspired by the latest measurement of muon g-2 by the Fermilab Experiment, we revisit a class of supersymmetric models in which non-universality at M_GUT allows us to realize relatively light sleptons in the few hundred GeV range. These sleptons provide additional contributions to muon g-2 that can be arranged to reconcile theory and experiment. The solutions compatible with the muon g-2 resolution typically predict light sleptons, charginos and neutralinos. We show how these solutions can be probed during LHC-Run3. A direct impact on the chargino mass is observed such that the chargino can be probed up to about 800 GeV during the Run3 experiments. Despite such a direct impact, it is still possible to realize lighter chargino masses which can escape detection due to the chirality mixture of the lighter slepton states. The colored squarks as well as the gluino turn out to be heavier than about 3-4 TeV if the LSP neutralino satisfies the Planck bound on the dark matter relic abundance. We highlight a variety of benchmark points and, in particular, coannihilation scenarios with dark matter candidates that will be tested in the ongoing and planned direct and indirect detection experiments. By relaxing the requirement that the LSP neutralino saturates the relic dark matter abundance, we are able to find solutions with gluino and squark masses in a range that may be accessible at LHC-Run3.