Is new physics hiding in the magnetic interaction of a muon? - Mark Lancaster

The interaction of a muon’s spin with a magnetic field defines its magnetic moment in terms of the gyromagnetic ratio, g. In the Dirac equation, g is exactly 2, but additional higher-order QED , electroweak and strong interactions increase its value by ~ 0.1%. Moreover, new interactions beyond the Standard Model of particle physics can also contribute at the level of approximately 1 part per million. Very precise measurements are thus required to uncover new, beyond the Standard Model, interactions. I will describe the most recent, world’s best, measurement, from the Fermilab Muon g-2 experiment: a measurement with a precision of 0.1 parts per million which is the most accurately measured quantity using a particle accelerator storage ring and the plans to improve the Standard Model prediction which will hopefully resolve whether the magnetic interaction of a muon is a harbinger of new physics or not. --------- CUPS - Cambridge University Physics Society We are a student-run university society organising scientific talks and other events for our members and public. CUPS is all about the physics you don't do in your degree. FIND US ON THE INTERNET: Instagram -   / camphysoc   talks.cam - http://talks.cam.ac.uk/show/index/6558 Website - http://www.camphysoc.co.uk Twitter -   / camphysoc   Facebook -   / camphysoc