AI 中文总结
研究原子核上弹性电子散射，开发含双光子交换机制的理论方法，小散射角下双光子交换振幅在衍射框架处理，其预测的束流极化不对称性运动学特征或可协调实验结果与前向极限，解决\(^{208}_{82}\)Pb的“PREX谜题”。
AI 中文摘要
我们开发了一种用于原子核上弹性电子散射的理论方法，该方法包含负责宇称守恒单自旋束流不对称性的双光子交换机制。小散射角下的双光子交换振幅在类似于应用于\(^{12}_{6}\)C、\(^{40}_{20}\)Ca和\(^{208}_{82}\)Pb原子核的π介子 - 原子核弹性散射的衍射框架中处理。预测的不同原子核的束流极化不对称性的运动学特征可能使杰斐逊实验室在有限散射角的实验结果与光学定理给出的前向极限相协调，可能解决\(^{208}_{82}\)Pb的所谓“PREX谜题”。
英文摘要
We developed a theoretical approach to elastic electron scattering on nuclei that includes a two-photon-exchange mechanism responsible for parity-conserving single-spin beam asymmetries. The two-photon-exchange amplitude at small scattering angles is treated in a diffractive framework similar to that of pion-nucleus elastic scattering applied to the nuclei $^{12}_{6}$C, $^{40}_{20}$Ca and $^{208}_{82}$Pb. The predicted kinematic features of the beam polarization asymmetries for different nuclei may reconcile Jefferson Lab's experimental results at finite scattering angles with a forward limit given by an optical theorem, potentially resolving the so-called ``PREX Puzzle" for $^{208}_{82}$Pb.
Comments9 pages, 5 figures
