28 July 2024 to 3 August 2024
Europe/London timezone

Divide and conquer the sea of quarks: an application to the HVP short-distance window

31 Jul 2024, 11:15
20m
Talk Quark and Lepton Flavour Physics Quark and lepton flavour physics

Speaker

Sebastian Spiegel (Universität Regensburg)

Description

The standing tension between experimental and theoretical results regarding the hadronic vacuum polarization (HVP) contribution to the anomalous magnetic moment of the muon motivates the development of novel methods to enhance theoretical estimates. We present a Lattice QCD study aimed at estimating the short-distance window to the HVP using an improved continuum extrapolation without the need of perturbative input. We combine a quenched continuum extrapolation using 18 lattice spacings ($a^2 \approx 0.001 - 0.016\,\text{fm}^2$) with a separate continuum extrapolation of the sea quark effects. This method allows the computationally expensive correction to be estimated using only a few ensembles at coarser lattice spacings, while largely isolating the logarithmic dependency of the continuum extrapolation in the quenched component.

Primary author

Sebastian Spiegel (Universität Regensburg)

Co-author

Christoph Lehner (University of Regensburg)

Presentation materials