""The old methodology involved collecting thousands of experimental results and reinterpreting them to get the single number, the magnetic moment of the muon. Our approach was completely different.""
""It took ten years to make those complicated calculations, but when they were done, Fodor et al. found their results agreed with the Standard Model to within half a standard deviation and down to 11 decimal places.""
""When we started to calculate this quantity, we thought we were going to have a good and trustworthy calculation for a new fifth force. Instead, we found there is no fifth force.""
The latest measurement focuses on hadronic vacuum polarization effects from quarks and gluons in quantum chromodynamics. A hybrid method combined large-scale simulations with experimental data. The new approach involved dividing space-time into small cells and solving Standard Model equations. After ten years of calculations, results aligned with the Standard Model to half a standard deviation and 11 decimal places. While it does not rule out new physics, it constrains potential areas. The discovery confirmed the Standard Model and quantum field theory, but the researchers expressed disappointment in not finding a fifth force.
#quantum-chromodynamics #standard-model #muon-magnetic-moment #hadronic-vacuum-polarization #new-physics
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