The upcoming high-Q² polarization transfer measurement of the proton electromagnetic form factor ratio using the new Super BigBite Spectrometer in Jefferson Lab's Hall A

The nucleon electromagnetic form factors (EMFFs) are centrally important quantities in the characterization of nucleon structure. Elastic EMFF measurements at large values of the invariant four-momentum transfer Q² have experienced a resurgence of interest since precise polarization transfer measurements in Jefferson Lab's Halls A and C revealed the strong decrease of the proton form factor ratio G_Ep/G_Mp with Q² for Q²≥1 GeV², revolutionizing our understanding of nucleon structure. In addition to being benchmark quantities for testing theoretical models of nucleon structure and dynamics, precise knowledge of the high-Q² form factors is required for the interpretation of a diverse range of phenomena in nuclear and hadronic physics. Measurements of nucleon EMFFs up to and beyond Q² ≈ 10 GeV² present special challenges, and are presently a unique worldwide capability of Jefferson Lab's Continuous Electron Beam Accelerator Facility. The new Super BigBite Spectrometer (SBS) in Jefferson Lab's Hall A is designed specifically to facilitate high-Q² EMFF measurements. In this talk, I will give an overview of the planned SBS measurement of the proton form factor ratio GEp/GMp to Q² = 12 GeV² using the polarization transfer method.