从电弱弹性散射数据看奇异夸克对核子自旋的贡献
Strange Quark Contribution to the Nucleon Spin from Electroweak Elastic Scattering Data
摘要：
奇异夸克对核子内禀自旋的总贡献可以通过测量奇异夸克对核子弹性轴向形状因子的贡献来确定。本文利用所有的弹性电弱散射数据，研究了奇异性对核子弹性矢量和轴向形状因子的贡献。具体来说，我们结合弹性$νp$和$\barν p$散射截面数据从布鲁克海文E734实验与弹性$ep$和准弹性$ed$和$e$ - $^4$他散射宇称违反不对称数据从SAMPLE，HAPPEX，G 0和PVA 4实验。我们不仅确定了这些形状因子在个别值的动量转移（$Q^2$），最近已经完成，但也适合$Q^2$依赖这些形状因子使用简单的功能形式。我们提出的结果，这些适合使用现有的数据，以及一些期望，我们的知识，这些形状因子可以提高与数据的MicroBooNE实验计划在费米实验室。
英文摘要：
The total contribution of strange quarks to the intrinsic spin of the nucleon can be determined from a measurement of the strange-quark contribution to the nucleon's elastic axial form factor. We have studied the strangeness contribution to the elastic vector and axial form factors of the nucleon, using all available elastic electroweak scattering data. Specifically, we combine elastic $νp$ and $\barν p$ scattering cross section data from the Brookhaven E734 experiment with elastic $ep$ and quasi-elastic $ed$ and $e$-$^4$He scattering parity-violating asymmetry data from the SAMPLE, HAPPEx, G0 and PVA4 experiments. We have not only determined these form factors at individual values of momentum-transfer ($Q^2$), as has been done recently, but also have fit the $Q^2$-dependence of these form factors using simple functional forms. We present the results of these fits using existing data, along with some expectations of how our knowledge of these form factors can be improved with data from the MicroBooNE experiment planned at Fermilab.
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。
