Determination of the Al27 Neutron Distribution Radius from a Parity-Violating Electron Scattering Measurement
Determination of the Al27 Neutron Distribution Radius from a Parity-Violating Electron Scattering Measurement
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通过宇称破坏电子散射测量确定 Al27 中子分布半径
DOI：
10.1103/physrevlett.128.132501
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发表时间：
2022
影响因子：
8.6
通讯作者：
Covrig Dusa, S.
中科院分区：
文献类型：
--
作者：
Androić, D.;Armstrong, D. S.;Bartlett, K.;Beminiwattha, R. S.;Benesch, J.;Benmokhtar, F.;Birchall, J.;Carlini, R. D.;Cornejo, J. C.;Covrig Dusa, S.
本文首次测量了宇称违反弹性电子散射的不对称性，其弹性不对称性为APV=2.16±0.11（stat）±0.16（syst）ppm，是在，，和用Jefferson实验室的装置测量的。使用简单的玻恩近似以及更复杂的扭曲波计算的预测与这一结果吻合得很好。根据这种不对称性，用多模型相关技术确定了中子半径。相应的中子皮厚度是小的，正如预期的轻核与中子过剩只有1。因此，这一结果作为一个成功的基准电弱测定中子半径较重的核。采用树级方法提取了弱半径和弱蒙皮厚度。这是一个很弱的形式因素。
We report the first measurement of the parity-violating elastic electron scattering asymmetry on. Theelastic asymmetry is APV=2.16±0.11(stat)±0.16(syst) ppm, and was measured at,, andwith theapparatus at Jefferson Lab. Predictions using a simple Born approximation as well as more sophisticated distorted-wave calculations are in good agreement with this result. From this asymmetry theneutron radiuswas determined using a many-models correlation technique. The corresponding neutron skin thicknessis small, as expected for a light nucleus with a neutron excess of only 1. This result thus serves as a successful benchmark for electroweak determinations of neutron radii on heavier nuclei. A tree-level approach was used to extract theweak radius, and the weak skin thickness. The weak form factor at thisis.