EP Seminar

Measuring the fine-structure constant to refine Standard Model predictions

by Prof. Saida GUELLATI (Laboratoire Kastler Brossel)

Video only (CERN)

Video only



The fine structure constant is this "magic and enigmatic" number close to 1/137 that appears in several areas of physics. This dimensionless constant characterizes the strength of the electromagnetic interaction between light and charged elementary particles, such as electron or muon. A precise knowledge of its numerical value is crucial to test, even with low-energy experiments, the calculations of quantum electrodynamics and some theoretical predictions of the Standard Model.

In this seminar, I will present our experiment that recently led to a new determination of the fine-structure constant with a relative uncertainty of $8.1 \times 10^{-11}$ and discuss the impact of this result on the tests of the Standard Model.

Organized by

M. Pepe-Altarelli, P. Silva

Videoconference Rooms
EP Seminar 4 May
Zoom Meeting ID
Angela Ricci
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There is a live webcast for this event