Résumé du preprint DAPNIA-05-115
| DAPNIA-05-115 |
|---|
| Parity-Violating Electron Scattering from $^4H$ and the Strange Electric Form Factor of the Nucleon (nucl-ex/0506010 v1) |
| K.A. Aniol et al (E. Burtin, D. Lhuillier, C. Munoz-Camacho, D. Neyret, A. Vacheret) |
We have measured the parity-violating electroweak asymmetry in the elastic scattering of polarized electrons from 4He at an average scattering angle hlabi = 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 Gs E can be isolated. The measured asymmetry of APV = (6.72±0.84(stat) ±0.21(syst))×10−6 yields a value of Gs E = −0.038 ± 0.042(stat) ± 0.010(syst) , consistent with zero. |
