A High Precision Measurement of the Neutron Electric Form Factor, G_Eⁿ at High Q2

Conference · Fri Jun 01 00:00:00 EDT 2007

DOI:https://doi.org/10.1063/1.2750888· OSTI ID:955813

Kelleher, Aidan

In the spring of 2006, Jefferson Lab experiment 02-â 013 successfully collected data to measure the neutron elastic form factor G_Eⁿ 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, G_Eⁿ will be extracted. A statistical accuracy of DeltaG_Eⁿ/G_Eⁿ [approximate] 0.14 is expected.

• Research Organization: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-060R23177
• OSTI ID: 955813
• Report Number(s): JLAB-PHY-07-806; DOE/OR/23177-0642; TRN: US1004757
• Resource Relation: Journal Volume: 915; Conference: Paper compiled for 17th International Spin Physics Symposium
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ACCURACY
ASYMMETRY
CROSS SECTIONS
EFFICIENCY
ELECTRONS
FORM FACTORS
NEUTRONS
PHOSPHORS
PHYSICS
RESOLUTION
SPECTROMETERS
SPIN
TARGETS