The Two-Boson-Exchange Correction to Parity-Violating Elastic Electron-Proton Scattering

Shin Nan Yang; Keitaro Nagata; Hai Qing Zhou; Chung Wen Kao

The Two-Boson-Exchange Correction to Parity-Violating Elastic Electron-Proton Scattering

Nuclear Theory 2009-01-16 v1

Authors: Shin Nan Yang , Keitaro Nagata , Hai Qing Zhou , Chung Wen Kao

Abstract

We calculate the two-boson-exchange (TBE) corrections to the parity-violating asymmetry of the elastic electron-proton scattering in a simple hadronic model including the nucleon and the $\Delta(1232)$ intermediate states. We find that $\Delta$ contribution $\delta_\Delta$ is, in general, comparable with the nucleon contribution $\delta_N$ and the current experimental measurements of strange-quark effects in the proton neutral weak current. The total TBE corrections to the current extracted values of $G^{s}_{E}+\beta G^{s}_{M}$ in recent experiments are found to lie in the range of $-7\sim +7%$ .

Keywords

compton scattering on nucleons elastic scattering nuclear scattering

Cite

@article{arxiv.0901.2320,
  title  = {The Two-Boson-Exchange Correction to Parity-Violating Elastic Electron-Proton Scattering},
  author = {Shin Nan Yang and Keitaro Nagata and Hai Qing Zhou and Chung Wen Kao},
  journal= {arXiv preprint arXiv:0901.2320},
  year   = {2009}
}

Comments

3 pages, 2 figs, 1 table, talk given at International Conference of Particle and Nuclei (PANIC08) Eilat, Israel, 9-14 Nov,2008

The Two-Boson-Exchange Correction to Parity-Violating Elastic Electron-Proton Scattering

Abstract

Keywords

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