Argonne National Laboratory

Upcoming Events

Precision Muon Physics at the Intensity Frontier: g-2 and Mu2e

HEP Special Seminar
James Mott, Boston University
May 16, 2018 11:00AM to 12:00PM
Building 362, Room F108

Abstract: The lepton sector offers many intriguing results that appear to hint at non-Standard Model physics. Two high-intensity muon experiments at Fermilab, Muon g-2 and Mu2e, will further probe this exciting field. Muon g-2 is measuring the anomalous magnetic moment of the muon, aμ. The last measurement of aμ at Brookhaven National Laboratory differs from the Standard Model prediction by 3–4 standard deviations — a possible indication of New Physics. The new experiment is currently running and will reduce the experimental uncertainty by a factor of four to 140 ppb.

I will give an overview of the theory and experiment, paying particular attention to the straw tracking system used to make measurements of the stored muon beam and extend the sensitivity to a muon electric dipole moment by two orders of magnitude. The experiment's current status will be reviewed, including the current timeline for a new result.

The Mu2e experiment will search for muon-to-electron conversion in the presence of an atom — an example of charged lepton flavor violation that has never been observed experimentally. The experiment's main detector is also a straw tracking system that will be used to deliver a sensitivity increased by four orders of magnitude with respect to current limits. In this talk, I will describe the experiment, its current status, and possible opportunities for future upgrades.