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2y ago

Muon Magnetic Moment Discrepancy Deepens As New Results Add Complexity

The Muon g-2 ring sits in its detector hall at U.S. Department of Energy's Fermi National Accelerator Laboratory (Fermilab) in Batavia, Illinois, U.S., in an undated handout photo. An experiment studied the wobble of subatomic particles called muons as they traveled through a magnetic field. Fermi National Accelerator Laboratory/Ryan Postel/Handout via REUTERS
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Overview

  • Recent precision measurement at Fermilab confirmed previous measurement of muon's magnetic moment.
  • Discrepancy between measurement and theory could indicate new undiscovered particles.
  • Conflicting calculations of virtual particles and hadronic contributions cause disagreement.
  • New results from Muon g-2 experiment add further complexity to understanding muon anomaly.
  • Disagreements persist both between and within theoretical and experimental methods.