A High Q<sup>2</sup> Measurement of the Neutron's Electric Form Factor: Status Update for the GEn-II Experiment at Jefferson Lab
ORAL
Abstract
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, GEn, 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 GEn. This talk will outline the experimental method used as well as provide an update on the status of data analysis.
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 GEn. This talk will outline the experimental method used as well as provide an update on the status of data analysis.
*This work was funded in part by the NSF (grant PHY-2012738) as well as the U.S. Department of Energy, Office of Science, Office of Nuclear Physics under contract DE-AC05-06OR23177.
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Presenters
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Katherine T Evans
- William & Mary