g-2 From Noncommutative Geometry

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This brief Letter demonstrates that effects from a space-time geometry will measurably affect the value of (g-2)μ inferred from the decay of the muon to an electron plus two neutrinos. If the scale of noncommutivity is O(TeV), the alteration of the V-A structure of the lepton-lepton-W vertex is sufficient to shift the inferred value of (g-2)μ to one part in 10⁸. This may account for the recently reported 2.6 σ discrepancy between the BNL measurement aexpt = 11659202(14)(6) × 10⁻¹⁰ and the Standard Model prediction aSM = 11659159.6(6.7) × 10⁻¹⁰.