A High Precision Measurement of the Neutron Electric Form Factor, GEn at High Q2
In the spring of 2006, Jefferson Lab experiment 02-â 013 successfully collected data to measure the neutron elastic form factor GEn at the four-momentum transfer values Q2 = 1.2, 1.8, 2.6, and 3.5(GeV/c)2. This measurement of the quasi-elastic semi-exclusive 3H-vector e(e-vector ,e[prime]n) reaction used the polarized CEBAF beam (Pb [approximate] 85%) and a highly polarized 3He target (Pt [approximate] 50%). Neutrons were detected in a large array of scintillators with an efficiency of 35â -40%. The electrons were detected by the newly commissioned BigBite spectrometer with a solid angle of 76msr and a momentum resolution of 1%. From the transverse asymmetry of the cross section, GEn will be extracted. A statistical accuracy of DeltaGEn/GEn [approximate] 0.14 is expected.
- Research Organization:
- Thomas Jefferson Lab National Accelerator Facility
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 955813
- Report Number(s):
- JLAB-PHY-07-806; DOE/OR/23177-0642
- Country of Publication:
- United States
- Language:
- English
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