Precision Measurement of Longitudinal and Transverse Response Functions of Quasi-Elastic Electron Scattering in the Momentum Transfer Range 0.55GeV/c ≤ q ≤ 0.9GeV/c

摘要

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, ~(12)C, ~(56)Fe and ~(208)Pb 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 0.55 GeV/c ≤ |q| ≤ 1.0 GeV/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.