A Penn State team has resolved a 25-year-old discrepancy in the muon's magnetic moment (g-2) using a lattice QCD approach — essentially a quantum chromodynamics equivalent of finite element modeling on supercomputers. After a decade of refinement, their calculations now match experimental results to 11 digits (0.5 sigma), effectively confirming the Standard Model is correct. While a computational triumph, this is bittersweet for physicists who had hoped the discrepancy would point to new physics beyond the Standard Model.
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