Muon g-2 vs LHC Run 2 in Supersymmetric Models

Abstract

Supersymmetric models with sub-TeV charginos and sleptons have been a candidate for the origin of the long-standing discrepancy in the muon anomalous magnetic moment (g-2). By gathering all the available LHC Run 2 results, we investigate the latest LHC constraints on models that explain the anomaly by their chargino contribution to the muon g-2. It is shown that the parameter regions where sleptons are lighter than charginos are strongly disfavored. In contrast, we find that the models with $m_{{\tilde{\mu }}_{\mathrm{L}}}\gtrsim m_{{\tilde{\chi }}_1^{\pm }}$ are still widely allowed, where the lighter chargino dominantly decays into a W-boson and a neutralino.

Comments: 35 pages, 14 figures; 2021 Spring Update with the latest LHC and g-2 data