Theory Seminar: Aida El-Khadra

Conference Date
Conference Location


We kindly ask all attendees to provide their full name when entering the event. If attendees have questions for the speaker, please introduce yourself before asking the question.

Speaker: Aida El-Khadra (University of Illinois Urbana-Champaign)

Title: The Dance of the Muon

Abstract: More than eighty years after the muon was first discovered, it is still a source of mystery. Indeed, experiments are underway or planned that use measurements of the muon's magnetic moment as a window to search for new physics — a central goal towards a deeper understanding of the fundamental particles and their interactions. The current difference between experiment and Standard-Model theory for the anomalous magnetic moment of the muon stands at 4.2 standard deviations. The Fermilab E989 experiment, which released their first measurement result in 2021, and the planned J-PARC E34 experiment aim to reduce the experimental uncertainties by a factor of four. To leverage this anticipated improvement in experimental precision, and determine unambiguously whether or not new-physics effects contribute to this quantity, the theoretical errors must be made more reliable and reduced to a commensurate level. The Muon g-2 Theory Initiative was formed in 2017 to provide platforms that facilitate interactions between the different groups to consolidate the Standard-Model prediction. Recent developments have created several puzzles in the evaluation of the hadronic vacuum polarization contribution, which is the dominant source of theory uncertainty. I will review the current status of Standard Model theory for this quantity and map out the future prospects.