First results from the Fermilab g-2 experiment

April 16, 2021

Prof. Renee Fatemi
Department of Physics,
University of Kentucky

Friday, April 16 at 4:00 pm via Zoom



 Fifteen years ago the g-2 experiment at Brookhaven National Laboratory published a 540 part-per-billion measurement of the anomalous magnetic moment of the muon, au = (gu - 2)=2. At the time this value was larger than the theoretical Standard Model calculation by nearly 3 sigma, a deviation that has grown to 3.7 sigma as the error on the theoretical calculations steadily decreased. The new muon g-2 experiment at Fermilab (E989) aims to reduce the errors on a  by a factor of four and shed light on this growing discrepancy. When combined with the expected improvements in the Standard Model calculations E989 should be able to definitively conclude if the Brookhaven result is due to unknown particles or forces. This talk will present an important step towards this goal, a 460 part-per-billion measurement of a au from the data collected during the first E989 experimental running period in 2018.


Dr. Renee Fatemi is a professor of physics at the University of Kentucky. She completed her Ph.D. in physics at the University of Virginia, and held academic positions at the University of Indiana and MIT before coming to UKY in 2007. Dr. Fatemi’s research focuses on accelerator based nuclear and particle physics. She is currently a member of the STAR Collaboration at the Relativistic Heavy Ion Collider and the g-2 collaboration at Fermi National Laboratory.