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arXiv 2107.08503hep-phhep-ex
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关于弹性过程中质子极化从初始到末态的转移$ e \vec {p} \to e \vec {p}$

On the Transfer of Polarization from the Initial to the Final Proton in the Elastic Process $ e \vec {p} \to e \vec {p}$

M. V. Galynskii

备注：
V2: A missed word in the abstract is inserted, formula (18) in the text fixed
发表信息：
JETP Lett. 113 (2021) 9, 555-562
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摘要：

利用JLab极化实验测量$\vec{e} p \to e \vec{p}$过程中Sachs形状因子的结果，数值分析了质子自旋翻转和非质子自旋翻转的截面比与$Q^2$的关系，以及过程$e \vec{p} \to e \vec{p}$中的极化不对称性.计算的情况下，初始（在休息）和最终的质子是完全极化的，并有一个共同的自旋量子化轴，这与最终的质子的运动方向相一致。在部分极化的初始质子的情况下，对于[A. Liyanage等人（SANE Collaboration），Phys.Rev.C101，035206（2020）]，其中在$\vec{e} \vec{p} \to e p$工艺中测量双自旋不对称性。发现质子极化转移对$Q^2$形式的$μ_p G_E/G_M$依赖性具有明显的敏感性，这种敏感性可用于进行一个新的独立实验来测量$ e \vec{p} \to e \vec{p}$过程中的这种依赖性。提出了一个用Rosenbluth技术测量Sachs形状因子比值的可靠性评价准则，并对两个实验结果进行了分析。

英文摘要：

The $Q^2$ dependence of the ratio of the cross sections with and without proton spin flip, as well as the polarization asymmetry in the process $e \vec{p} \to e \vec{p}$ has been numerically analyzed using the results of JLab polarization experiments on the measurements of the ratio of the Sachs form factors in the $\vec{e} p \to e \vec{p}$ process. The calculations have been made for the case where the initial (at rest) and final protons are fully polarized and have a common spin quantization axis, which coincides with the direction of motion of the final proton. The longitudinal polarization transfer to the proton has been calculated in the case of the partially polarized initial proton for a kinematics used in the experiment reported in [A. Liyanage et al. (SANE Collaboration), Phys. Rev. C 101, 035206 (2020)], where the double spin asymmetry was measured in the $\vec{e} \vec{p} \to e p$ process. A noticeable sensitivity of the polarization transfer to the proton to the form of the $Q^2$ dependence of the ratio $μ_p G_E/G_M$ has been found. This sensitivity may be used to conduct a new independent experiment to measure this dependence in the $ e \vec{p} \to e \vec{p}$ process. A criterion to assess the reliability of measurements of the ratio of Sachs form factors using the Rosenbluth technique has been proposed and used to analyze the results of two experiments.

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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