Tag Archive for 'Magnetic moment'

A muon particle passing through lead in a cloud chamber. Image credit: Jino John 1996 / CC BY-SA 4.0.

Physicists Measure Muon Magnetic Anomaly with Unprecedented Precision

Jun 4, 2025 by News Staff

Physicists from the Muon g-2 experiment have released their third measurement of the muon magnetic anomaly. The final result agrees with their published...

Physicists Measure Muon’s Magnetic Moment with Unprecedented Precision

Aug 15, 2023 by News Staff

Physicists report a new measurement of the muon magnetic anomaly using data collected in 2019 and 2020 by the Muon g-2 experiment at Fermilab National...

New Measurements of Muon’s Magnetic Moment Strengthen Evidence of New Physics

Apr 8, 2021 by News Staff

The Standard Model, scientists’ best description of the makeup and behavior of the Universe yet, very precisely predicts the g-factor of a fundamental...

Proton is a subatomic particle found in the nucleus of every atom. This artist’s impression shows a proton and a neutron. Image credit: Joanna Griffin / Jefferson Lab / Penn State.

Physicists Precisely Measure Proton’s Magnetic Moment

Nov 27, 2017 by Enrico de Lazaro

In a paper published in the journal Science, a team of physicists from Japan and Germany reports the most precise measurement ever made of the magnetic...

Top: schematic of the Penning trap set-up used in CERN’s BASE experiment; a cloud of antiprotons is stored in the reservoir trap (RT), which supplies single particles to the co-magnetometer trap (CT) and the analysis trap (AT) when required; the CT is used for continuous magnetic field measurements; the AT is the trap with the strong superimposed magnetic bottle, which is used to measure the cyclotron frequency and the Larmor frequency. All traps are equipped with radio-frequency excitation electronics and highly sensitive superconducting detection systems. Bottom: results of the six g-factor measurements carried out during CERN’s 2015/2016 accelerator shutdown between February 20 and March 5, 2016; based on this set of measurements H. Nagahama et al extract gp/2=2.7928465(23), as indicated by the red line; the green lines show the 95% confidence level error, the blue line represents the currently accepted value of the proton g-factor gp/2=2.792847350(9); the error bars of the individual measurements are based on the uncertainties of the individual frequency measurements, which are dominated by the random walk in the magnetron mode. Image credit: H. Nagahama et al, doi: 10.1038/ncomms14084.

Physicists Precisely Measure Magnetic Moment of Antiproton

Jan 22, 2017 by News Staff

An international team of physicists led by RIKEN researcher Stefan Ulmer has found that the magnetic moment of the antiproton is extremely close to that...