Summary
This theoretical Letter addresses a quantitative gap in holographic QCD descriptions of hadronic light-by-light scattering relevant to the muon anomalous magnetic moment. The authors demonstrate that tensor mesons—whose contributions to muon g-2 have been recently reassessed—can fill the 19% deficit in the longitudinal short-distance constraint at all virtualities by providing sizeable low-energy contributions whilst maintaining agreement with dispersive and lattice QCD results. The work reconciles holographic QCD predictions with recent precision measurements of the muon g-2 anomaly.
Key measures
Longitudinal short-distance constraint matching percentage (81% in baseline AdS/QCD); tensor meson contributions to muon g-2; energy-region decomposition (low-energy <1.5 GeV, mixed region, high-energy region)
Outcomes reported
The study evaluated short-distance constraints on hadronic light-by-light scattering contributions to the muon anomalous magnetic moment using holographic QCD models. It demonstrated that tensor meson contributions, particularly from the low-energy region below 1.5 GeV, can resolve a discrepancy between AdS/QCD predictions and dispersive/lattice results for the complete hadronic light-by-light contribution.
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