The 43rd International Symposium on Lattice Field Theory (Lattice 2026)

Spurion Matching of Hadronic Vacuum Polarization and Hadronic Light-by-Light Diagrams

Not scheduled

20m

University of Maryland, College Park

Poster presentation Quark and lepton flavor physics

Speaker

Jacob Sitison (University of Colorado Boulder)

Description

Chiral perturbation theory ($\chi$PT) is the effective field theory (EFT) of QCD at low energies and is routinely used to complement lattice QCD analyses.  EFT matching can be used to relate objects, such as operators and correlators, in the UV theory (QCD) to those in the IR EFT ($\chi$PT).  In this poster, we present a charge matrix spurion analysis to match diagrams with external vector currents utilizing QED isospin structure.  The diagrams considered are relevant for QED corrections to the hadronic vacuum polarization for muon $g-2$.