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arXiv 1604.02421nucl-thhep-ph
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非极化弹性电子质子散射的形状因子比

Form factor ratio from unpolarized elastic electron proton scattering

Simone Pacetti, Egle Tomasi Gustafsson

摘要:

用电磁形状因子平方比重新分析了非极化电子-质子弹性散射数据。原则上,这个观测值对实验相关性和全局归一化更鲁棒。本分析确实表明,这是一个有用的数量,包含可靠和连贯的信息。与极化电子-质子散射中反冲质子纵、横极化测量值的比较表明,在实验误差范围内,计算结果是一致的。在运动学上设置限制,其中可以安全地提取关于形状因子的物理信息。在这项工作中提出的结果带来了一个决定性的信息,从偶极子依赖的质子形状因子的偏差的争议。

英文摘要:

A reanalysis of unpolarized electron-proton elastic scattering data is done in terms of the electric to magnetic form factor squared ratio. This observable is in principle more robust against experimental correlations and global normalizations. The present analysis shows indeed that it is a useful quantity that contains reliable and coherent information. The comparison with the ratio extracted from the measurement of the longitudinal to transverse polarization of the recoil proton in polarized electron-proton scattering shows that the results are compatible within the experimental errors. Limits are set on the kinematics where the physical information on the form factors can be safely extracted. The results presented in this work bring a decisive piece of information to the controversy on the deviation of the proton form factors from the dipole dependence.

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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