Gaugino mediation scenarios for muon g − 2 and dark matter

oleh: Peter Cox, Chengcheng Han, Tsutomu T. Yanagida, Norimi Yokozaki

Format: Article
Diterbitkan: SpringerOpen 2019-08-01

Deskripsi

Abstract We explore the possibility that the muon g − 2 anomaly and the nature of dark matter can be simultaneously explained within the framework of gaugino mediation, focusing on bino-like dark matter where the observed abundance is obtained via co-annihilations. The minimal model with non-universal gaugino masses is excluded by stau vacuum instability, although this constraint can be somewhat relaxed via the addition of a universal soft scalar mass (or B − L gaugino mediation). A more promising alternative is gaugino+Higgs mediation, which significantly raises the soft masses of the third generation sfermions leading to a split spectrum. In this framework, the muon g − 2 can be easily explained and the dark matter abundance obtained through either bino-wino or bino-slepton co-annihilations.