Model-independent extraction of two-photon effects in elastic electron–proton scattering
Model-independent extraction of two-photon effects in elastic electron–proton scattering
复制标题
弹性电子-质子散射中双光子效应的模型独立提取
DOI：
10.1016/j.physletb.2007.10.031
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发表时间：
2007
影响因子：
4.4
通讯作者：
U. Meissner
中科院分区：
文献类型：
--
作者：
M. Belushkin;H. Hammer;U. Meissner
我们解决了核子电磁形状因子的 Rosenbluth 数据和极化传输数据之间的差异。假设双光子校正对偏振传输数据的影响可以忽略不计，我们获得了双光子校正 Δ2γ 的模型独立估计。我们使用色散关系分别分析偏振传输数据和横截面数据。然后从两个分析的比较中获得 Δ2γ 的中心值和误差估计。 Δ2γ 的结果值与文献中的直接计算结果非常一致。
We address the discrepancy between the Rosenbluth and polarization transfer data for the electromagnetic form factors of the nucleon. Assuming that the effect of two-photon corrections on the polarization transfer data is negligible, we obtain a model-independent estimate of the two-photon correction Δ2γ. We analyze the polarization transfer data and the cross section data separately using dispersion relations. A central value as well as an error estimate for Δ2γis then obtained from a comparison of the two analyses. The resulting values for Δ2γare in good agreement with direct calculations available in the literature.
影响因子：
3.1
作者：
M. Belushkin;H. Hammer;U. Meissner
通讯作者：
M. Belushkin;H. Hammer;U. Meissner