Publications [#246133] of Haiyan Gao

Papers Published

1. with al, OGE, Measurement of the elastic electromagnetic form-factor ratio gamma-p G P/E//G P/Mvia polarization transfer, Phys. Rev. C, vol. 64 no. 3 (2001), pp. 038202 [doi]
   (last updated on 2026/01/14)

   Abstract:
   We present measurements of the ratio of the proton elastic electromagnetic form factors, μpGEp/GMp . The Jefferson Lab Hall A Focal Plane Polarimeter was used to determine the longitudinal and transverse components of the recoil proton polarization in ep elastic scattering; the ratio of these polarization components is proportional to the ratio of the two form factors. These data reproduce the observation of Jones et al. [Phys. Rev. Lett. 84, 1398 (2000)], that the form factor ratio decreases significantly from unity above Q2 =1 GeV2.