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Theoretical High Energy Particle Physics Group

The muon has been a source of interesting physical phenomena ever since its discovery which prompted Nobel Laureate Isadore Rabi to exclaim, ``Who ordered that?'' The anomalous magnet moments (g-2) of (first) the electron and (now) the muon have provided evidence of the spectacular success of quantum field theory. However, for over twenty years there had been about a three standard deviation tension between the experimental measurement of the muon g-2 and the Standard Model calculation of its value. In April, 2021, E989 the Fermilab g-2 experiment announced its initial result. This resulted in a 4.2 standard deviation between theory and experiment, not quite the 5 standard deviation difference to declare evidence for new physics beyond the Standard Model. We will discuss the plot twists in theory and experiment that happened since then.

Further information

Time:

22May
May 22nd 2026
16:00 to 17:00

Venue:

MR19 (Potter Room, Pavilion B), CMS

Speaker:

Steven Gottlieb, Indiana University

Series:

HEP phenomenology joint Cavendish-DAMTP seminar