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arXiv 0901.2320nucl-th
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电子-质子破宇称弹性散射的双玻色子交换修正

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

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

摘要:

在一个包含核子和$Δ(1232)$中间态的简单强子模型中,计算了电子-质子弹性散射宇称破坏不对称性的双玻色子交换修正。我们发现,在质子中性弱流中,$Δ$贡献$δ_Δ$与核子贡献$δ_N$和目前实验测量的奇夸克效应是相当的.在最近的实验中,发现对当前提取的$G^{s}_{E}+βG^{s}_{M}$值的总TBE校正位于$-7\sim +7%$的范围内。

英文摘要:

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 $Δ(1232)$ intermediate states. We find that $Δ$ contribution $δ_Δ$ is, in general, comparable with the nucleon contribution $δ_N$ 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 $G^{s}_{E}+βG^{s}_{M}$ in recent experiments are found to lie in the range of $-7\sim +7%$.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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