2023/12/29 by Li, Weichao, Qiao, Haoxue, Wang, Kun +1 · 1 citation
#FOS: Physical sciences #High Energy Astrophysical Phenomena (astro-ph.HE) #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Phenomenology (hep-ph)
paper · doi:10.48550/arxiv.2312.17523
In GUT-scale constrained (GUTc) supersymmetric (SUSY) models, the mass of smuon μ1 is typically heavier than that of stau τ1, and stau co-annihilation is a typical annihilation mechanism of dark matter. However, light smuon is more favored by the muon g-2 anomaly, thus smuon-neutralino loop contribution to muon g-2 is usually smaller than that of sneutrino-chargino. Inspired by the latest muon g-2 results, we take the GUTc- Next-to-Minimal Supersymmetric Model (NMSSM) as an example, where the gaugino (Higgs) masses are not unified to the usual parameter M1/2 (M0), exploring its possibility of light smuon and its contribution to muon g-2. After complicated calculations and discussions, we conclude that in GUTc-NMSSM the smuon can be lighter than stau. In this light-smuon scenario, the contribution of smuon-neutralino loop to the muon g-2 can be larger than that of the sneutrino-chargino loop. The annihilation mechanisms of dark matter are dominated by multiple slepton or chargino co-annihilation. In our calculations, we consider also other latest related constraints like Higgs data, SUSY searches, dark matter relic density and direct detections, etc.