Mainz 2026 – scientific programme
Parts | Days | Selection | Search | Updates | Downloads | Help
A: Fachverband Atomphysik
A 4: Highly Charged Ions and their Applications I
A 4.5: Talk
Monday, March 2, 2026, 12:45–13:00, N 25
Hadronic Vacuum Polarization: From functional QCD to Atomic Physics — •Eugen Dizer1, Zoltán Harman2, Franz R. Sattler3, and Jonas Wessely4 — 1Institut für Theoretische Physik, Universität Heidelberg, Philosophenweg 12, 69120 Heidelberg, Germany — 2Max Planck Institute for Nuclear Physics, Saupfercheckweg 1, 69117 Heidelberg, Germany — 3Fakultät für Physik, Universität Bielefeld, 33615 Bielefeld, Germany — 4Institut für Theoretische Physik, Justus-Liebig-Universität, Heinrich-Buff-Ring 16, 35392 Giessen, Germany
Hadronic vacuum polarization (HVP) remains a major source of uncertainty in precision tests of the Standard Model, particularly in the muon anomalous magnetic moment aµ. The persistent discrepancy between data-driven evaluations and lattice QCD, together with recent updates to g−2, motivates a deeper investigation of HVP across independent methods. We study the hadronic polarization function Πhad(q2) using functional QCD techniques, and compare with state-of-the-art data-driven determinations and lattice calculations.
We propose highly charged ions and muonic atoms as sensitive and experimentally accessible systems for probing HVP at low momentum transfer. Their clean QED structure and tunable energy scales make them an ideal platform for testing effective hadronic contributions. Using an updated effective Uehling potential, we evaluate HVP effects in these systems and assess their potential to clarify the present data–lattice tension.
Keywords: Anomalous Magnetic Moment; Functional Methods; Precision Physics; Quantum Chromodynamics; Uehling Potential