Proton elastic form factor ratios to Q = 3.5 GeV2 by polarization transfer
Research output: Contribution to journal › Article
The ratio of the proton elastic electromagnetic form factors, GEp/GMp, was obtained by measuring Pt and P, the transverse and longitudinal recoil proton polarization components, respectively, for the elastic epepreaction in the four-momentum transfer squared range of 0.5 to 3.5 GeV2. In the single-photon exchange approximation, GEp/GMp is directly proportional to Pt/P. The simultaneous measurement of Pt and P in a polarimeter reduces systematic uncertainties. The results for GEp/GMp show a systematic decrease with increasing Q2, indicating for the first time a definite difference in the distribution of charge and magnetization in the proton. The data have been reanalyzed and their systematic uncertainties have become significantly smaller than those reported previously.
|Research areas and keywords||
Subject classification (UKÄ) – MANDATORY
|Journal||Physical Review C: covering nuclear physics|
|Publication status||Published - 2005|
1999/01/01 → 2018/12/31