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Article Dans Une Revue Physical Review D Année : 2023

The (g-2)$_\mu$ window discrepancy: a GeV-scale new physics explanation

Résumé

Recent lattice determinations of the hadronic vacuum polarization contribution to the muon anomalous magnetic moment $a_{\mu}^{\rm HVP}$ indicate an exacerbation of the discrepancy with the data driven dispersive method at the level of $\sim 4.5\sigma$. This disagreement could be due to some process beyond the standard model affecting the determination of $a_\mu$ from $e^+e^- \to\;$hadrons data within a certain energy range. Recently, we built a new physics mechanism that could explain the lattice versus data-driven discrepancy together with other $a_\mu$ related anomalies. Here we study how our theoretical construction performs in the short, intermediate and long distance windows. We find that, in agreement with lattice indications, the dominant effects are confined to the low and intermediate energy windows, while the high energy window remains largely unaffected.

Dates et versions

hal-03920008 , version 1 (03-01-2023)

Identifiants

Citer

Luc Darmé, Giovanni Grilli Di Cortona, Enrico Nardi. The (g-2)$_\mu$ window discrepancy: a GeV-scale new physics explanation. Physical Review D, 2023, 108 (9), pp.095056. ⟨10.1103/PhysRevD.108.095056⟩. ⟨hal-03920008⟩
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