Speaker
Description
Precise lepton-proton (l-P) scattering experiments need similarly precise theory predictions. It is now possible to model electron-proton scattering at next-to-next-to-leading order (NNLO) in QED. These corrections can be similar in size or even larger than contributions that probe more in depth the nuclear structure, e.g. two-photon exchange corrections. Hence both kinds of contributions need to be brought under control. In this talk I will introduce the McMule framework for NNLO QED calculations and explain the theory background that is required to use it in the context of l-P scattering. I will then present results for the ULQ2 experiment, including an extension of the framework, where P can be any nucleus with a definite spin, e.g. carbon or deuteron, in the one-photon exchange approximation.
