The hadronic vacuum polarization contribution to the anomalous magnetic moment of the muon from lattice QCD

Particle Physics Theory seminar

The hadronic vacuum polarization contribution to the anomalous magnetic moment of the muon from lattice QCD

  • Event time: 2:00pm until 3:00pm
  • Event date: 1st February 2023
  • Speaker: Simon Kuberski (Johannes Gutenberg-Universit├Ąt Mainz)
  • Location: Higgs Centre Seminar Room, Room 4305,

Event details

The long-standing tension between theoretical predictions and
experimental results for the anomalous magnetic moment (g-2) of the muon
is considered to be one of the most promising directions to search for
physics beyond the Standard Model of particle physics at the high
precision frontier. The uncertainty of the theory prediction is
dominated by non-perturbative hadronic contributions. It has to be
reduced considerably in the near future to confront upcoming
experimental results. Lattice QCD will play a central role in this task.
I will discuss the challenges connected with a sub-percent precision
determination of the hadronic vacuum polarization (HVP) contribution to
the muon g-2 from lattice QCD and how these can be addressed. In the
last year, a set of results has been obtained for the contribution to
the HVP at intermediate energies which is especially well suited for the
evaluation on the lattice. I will present some details of our
calculation using 2+1 flavors of O(a) improved Wilson fermions on
ensembles generated by the CLS effort. The result at the physical point
is well compatible with other lattice results but shows a significant
deviation with respect to the evaluation based on data-driven methods.
This tension has to be understood by the community in order to provide a
reliable Standard Model prediction for the HVP.

About Particle Physics Theory seminars

The Particle Physics Theory seminar is a weekly series of talks reflecting the diverse interests of the group. Topics include analytic and numerical calculations based on the Standard Model of elementary particle physics, theories exploring new physics, as well as more formal developments in gauge theories and gravity..

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