Particle Theory Seminar | Sebastian Baum (Stanford) “The Muon g-2 Anomaly and (Supersymmetric) Solutions”

Seminar Organizer

Event Details

The latest measurement of the muon anomalous magnetic moment by the Fermilab Muon g-2 collaboration has increased the tension with the most precise and reliable calculation of this quantity in the Standard Model to more than 4 sigma. I will discuss a number of different solutions that have been proposed in the literature to explain this discrepancy, and consider their relation to other Standard Model anomalies, especially in the muon sector. Then, I will concentrate on a simple supersymmetric model that also provides a dark matter explanation. I will discuss an interesting region of supersymmetric parameter space that simultaneously realizes a Bino-like dark matter candidate compatible with direct detection constraints for small to moderate values of the Higgsino mass parameter |μ|. This region of parameter space can be probed in direct detection experiments and future LHC runs. Interestingly, upgrades during the last long shutdown now enable the ATLAS experiment to effectively trigger on the mono-photon+missing-transverse-energy channel, opening up a crucial probe of this region of parameter space in ongoing and future runs of the LHC.