Progress on $(g-2)_\mu$ from Lattice QCD
Hartmut Wittig
TL;DR
This paper reviews recent lattice QCD calculations of the hadronic vacuum polarization contribution to the muon's anomalous magnetic moment, highlighting tensions with traditional methods and discussing implications for the Standard Model and electroweak fits.
Contribution
It provides an update on lattice QCD results for $(g-2)_$, emphasizing the discrepancies with data-driven approaches and exploring their impact on fundamental physics.
Findings
Lattice QCD results show tension with dispersive method estimates.
Implications for the running of the electromagnetic coupling are discussed.
The consistency of electroweak global fits is examined.
Abstract
I review the status of lattice QCD calculations of the hadronic contributions to the muon's anomalous magnetic moment, focussing on the hadronic vacuum polarisation contribution which dominates the uncertainty of the Standard Model prediction.This quantity exhibits a tension between recent lattice QCD results and the traditional data-driven dispersive method. I discuss the implications for the running of the electromagnetic coupling and the consistency of global fits using electroweak precision data.
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Taxonomy
TopicsComputational Physics and Python Applications · Particle physics theoretical and experimental studies · Quantum Chromodynamics and Particle Interactions