A High Q² Measurement of the Neutron's Electric Form Factor: Status Update for the GEn-II Experiment at Jefferson Lab

The SBS (Super Bigbite Spectrometer) experimental program is a series of experiments taking place in Hall A at Jefferson Lab that seeks to measure various nucleon elastic form factors at high values of Q². In particular, the aptly named GEn-II experiment was designed with the purpose of extracting the electric form factor of the neutron, G_Eⁿ, at Q² values of up to 9.7 GeV², higher than ever experimentally measured.

GEn-II successfully took data between September 2022 and October 2023, and analysis is currently underway. Quasi-elastic scattering of a polarized electron beam incident on a polarized ³He target, designed to handle more than twice the luminosity of previous similar $^3$He targets, provided a double spin asymmetry in the e-n scattering cross section which will be used to extract G_Eⁿ. This talk will outline the experimental method used as well as provide an update on the status of data analysis.