Aug 2 – 6, 2021
Europe/Brussels timezone

Electromagnetic finite-size effects beyond the point-like approximation

Aug 3, 2021, 9:50 AM


Parallel contribution E: QCD and New Physics Parallels Track E


Nils Hermansson-Truedsson (Universität Bern)


In this talk we present a relativistic and model-independent method to analytically derive electromagnetic finite-size effects beyond the point-like approximation. Structure-dependence appears in terms of physical form-factors and derivatives thereof. The values of these physical quantities can be taken either from experimental measurements or auxiliary lattice calculations. We first apply our method to the meson mass, and then to leptonic decays of pions and kaons. The knowledge of the latter allows for improved numerical control in extractions of the relevant CKM-matrix elements from lattice QCD+QED.

Primary author

Nils Hermansson-Truedsson (Universität Bern)


Dr Antonin Portelli (University of Edinburgh) Dr Maxwell Hansen (University of Edinburgh) Dr Matteo Di Carlo (University of Edinburgh)

Presentation materials