Aug 20 – 26, 2023
Natural Science Lecture Center (building-28), Seoul National University, Korea
Asia/Seoul timezone

Measurement of the muon anomalous precession frequency $\omega_a$ in the Fermilab muon g−2 experiment

Aug 25, 2023, 11:40 AM
20m
Natural Science Lecture Center (building-28), Seoul National University, Korea

Natural Science Lecture Center (building-28), Seoul National University, Korea

Natural Science Lecture Center Seoul National University Building-28, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Korea
Oral WG4: Muon Physics parallel (room#303)

Speaker

Dr Paolo Girotti (Istituto Nazionale di Fisica Nucleare Pisa)

Description

The Fermilab Muon g-2 experiment was designed to measure the muon's anomalous magnetic moment $a_\mu = (g-2)/2$ to 140 parts per billion. The value of $a_\mu$ is proportional to the difference frequency $\omega_a = \omega_s - \omega_c$ between the muon's cyclotron frequency and spin precession frequency in the uniform magnetic field of the g-2 storage ring. The frequency $\omega_a$ is extracted from the time distribution of the mu-decay positrons recorded by 24 electromagnetic calorimeters positioned around the inner circumference of the storage ring. We will discuss the various approaches to the frequency determination including the reconstruction and fitting of time distributions, fitting of time distributions, and procedures for handling the effects of gain changes, positron pileup and beam dynamics. We also discuss the data consistency checks and the strategy for the averaging of the $\omega_a$ across the different analyses.

Primary author

Dr Paolo Girotti (Istituto Nazionale di Fisica Nucleare Pisa)

Presentation materials