论文标题
$ {}^{12} $ c的弱充电和弱半径
Weak charge and weak radius of ${}^{12}$C
论文作者
论文摘要
我们介绍了对弱电荷的同时次级提取的可行性研究，并基于在很大程度上基于对不确定性的模型独立的评估，使用平均侵略电子散射的$ {}^{}^{12} $ c核的弱半径。相应的测量被认为是在Mainz的未来Mesa设施中进行的，并使用$ e _ {\ rm Beam} = 155 $ MEV进行。我们发现，将$ 0.3 \％$的精确度量组合在一起，以向后角度的向前角度进行均衡不对称的不对称性，以向后角度进行$ 10 \％$的测量，可以确定弱充电和$ {}^{12} $ c的弱radius，其$ {}^{12} $ c，$ 0.4 \％\％\％\％\％和0.5 \％$ \％$ $ \％$ $ cecies cpecision。对于$ 3 \％$向后测量，这些值可以提高到$ 0.3 \％$和$ 0.2 \％$。该实验计划将对电动部门和核结构的精确低能测试产生影响。
We present a feasibility study of a simultaneous sub-percent extraction of the weak charge and the weak radius of the ${}^{12}$C nucleus using parity-violating electron scattering, based on a largely model-independent assessment of the uncertainties. The corresponding measurement is considered to be carried out at the future MESA facility in Mainz with $E_{\rm beam} = 155$ MeV. We find that a combination of a $0.3\%$ precise measurement of the parity-violating asymmetry at forward angles with a $10\%$ measurement at backward angles will allow to determine the weak charge and the weak radius of ${}^{12}$C with $0.4\%$ and $0.5\%$ precision, respectively. These values could be improved to $0.3\%$ and $0.2\%$ for a $3\%$ backward measurement. This experimental program will have impact on precision low-energy tests in the electroweak sector and nuclear structure.
