Monday, January 30, 2017, 10:30 AM, room 385
Jan Bernauer
The Precision Frontier: Lepton-Proton Scattering

The nucleon and its structure are the focus of intense study on all energy scales, in both current and upcoming experiments. It is one of the simplest systems in non-perturbative QCD and the accurate description of its properties are a touchstone for theoretical calculations. Recent precision experiments have provided a wealth of information, but have also illuminated two glaring discrepancies: the proton radius puzzle and the form factor ratio divergence. The former, still unsolved, may have opened the door to the discovery of physics beyond the Standard Model. While a solution for the latter seems in reach, the precision results of OLYMPUS prove theoretical calculations to be incomplete. In this talk, I will discuss the Mainz high precision form factor measurement and global form factor analysis, which are corner stones of the radius puzzle and the OLYMPUS experiment, aiming to explain the ratio discrepancy.I will further discuss shortly MUSE and other precision-frontier experiments that will bring new data with regard to the proton radius puzzle; and the DarkLight experiment, which will search for physics beyond the Standard Model at the intensity frontier.