Sonia Bacca (U. Mainz) Ab-initio electroweak reactions with nuclei The past decade has witnessed tremendous progress in the theoretical and computational tools that produce our understanding of the nucleus as a compound object of interacting protons and neutrons. A number of ab initio calculations of nuclear electroweak properties that started from interactions and currents obtained from chiral effective field theory have successfully described key experimental observables, yielding a complete picture of how nuclei interact with electroweak probes. The level of accuracy and confidence reached by ab initio calculations opens up the concrete possibility of using nuclear theory to help address open questions in other sub-fields of physics, such as neutrino physics. In this talk, I will present our recent results obtained from coupled-cluster theory for the charge and weak form factors of the 40Ar nucleus and our recent results for electron-scattering cross section of 40Ca.