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Parity-Violating Electron Scattering From 4he And The Strange Electric Form Factor Of The Nucleon, K. A. Aniol, Edgar E. Kooijman
Parity-Violating Electron Scattering From 4he And The Strange Electric Form Factor Of The Nucleon, K. A. Aniol, Edgar E. Kooijman
Edgar E Kooijman
We have measured the parity-violating electroweak asymmetry in the elastic scattering of polarized electrons from 4He at an average scattering angle ⟨θlab⟩=5.7° and a four-momentum transfer Q2=0.091 GeV2. From these data, for the first time, the strange electric form factor of the nucleon GEs can be isolated. The measured asymmetry of APV=(6.72±0.84(stat)±0.21(syst))×10-6 yields a value of GEs=-0.038±0.042(stat)±0.010(syst), consistent with zero.
High Energy Angular Distribution Measurements Of The Exclusive Deuteron Photodisintegration Reaction, E. C. Shulte, Edgar E. Kooijman
High Energy Angular Distribution Measurements Of The Exclusive Deuteron Photodisintegration Reaction, E. C. Shulte, Edgar E. Kooijman
Edgar E Kooijman
The first complete measurements of the angular distributions of the two-body deuteron photodisintegration differential cross section at photon energies above 1.6 GeV were performed at the Thomas Jefferson National Accelerator Facility. The results show a persistent forward-backward asymmetry up to Eγ=2.4GeV, the highest-energy measured in this experiment. The Hard Rescattering and the Quark-Gluon string models are in fair agreement with the results.