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arXiv 0903.4324hep-ph
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从弹性$ep$数据的整体拟合预测$e^{\pm}p$散射截面的比率

The ratio of $e^{\pm}p$ scattering cross sections predicted from the global fit of elastic $ep$ data

W. M. Alberico, S. M. Bilenky, C. Giunti, K. M. Graczyk

摘要:

我们提出的预测值的横截面比$σ(e^+p \to e^+p)/σ(e^-p \to e^-p)$,确定从我们的弹性$ep$截面和极化数据的拟合。在这种拟合中,我们考虑了现象学的双光子交换色散校正。计算了VEPP-3实验所需的截面比。还考虑了E04-116 JLab实验将覆盖的运动学区域。结果表明,对于这两个实验的预测的横截面比偏离大于$3σ$内的统一。

英文摘要:

We present predictions for the value of the cross section ratio $σ(e^+p \to e^+p)/σ(e^-p \to e^-p)$, determined from our fit of the elastic $ep$ cross section and polarization data. In this fit we took into account the phenomenological two-photon exchange dispersive correction. The cross section ratios which are expected to be measured by the VEPP-3 experiment are computed. The kinematical region which will be covered by the E04-116 JLab experiment is also considered. It is shown that for both experiments the predicted cross section ratios deviate from unity within more than $3σ$.

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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