Precision measurement of longitudinal and transverse response functions of quasi-elastic electron scattering in the momentum transfer range 0.55 GeV/c≤|q vector |≤0.9GeV/c.

In order to test the Coulomb sum rule in nuclei, a precision measurement of inclusive electron scattering cross sections in the quasi-elastic region was performed at Jefferson Lab. Incident electrons of energies ranging from 0.4 GeV/c to 4 GeV/c scattered off 4He, 12C, 56Fe and 208Pb nuclei at four scattering angles (15°, 60°, 90°, 120°) and scattered energies ranging from 0.1 GeV/c to 4 GeV/c. The Rosenbluth method with proper Coulomb corrections is used to extract the transverse and longitudinal response functions at three-momentum transfers 0.55GeV/c≤|q→|≤1.0GeV/c. The Coulomb Sum is determined in the same |q→| range as mentioned above and will be compared to predictions. Analysis progress and preliminary results will be presented. [ABSTRACT FROM AUTHOR]