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arXiv 0709.3538hep-ex
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从氘中微子实验中提取轴向核子形状因子

Extraction of the Axial Nucleon Form Factor from Neutrino Experiments on Deuterium

A. Bodek, S. Avvakumov, R. Bradford, H. Budd

摘要:

我们提出了矢量和轴向核子形状因子的新参数化。我们保持一个很好的描述在低动量转移($Q^2$),核子的空间结构是很重要的形状因子,并使用Nachtman标度变量$ξ$有关的弹性和非弹性形状因子,并施加夸克强子的对偶性约束在高$Q^2$的夸克结构占主导地位。我们使用新的矢量形状因子重新提取更新的值的轴向形状因子从$\numu$氘实验。我们从$\numu$ d、$\numubar$ H和$M_{A}$ = $1.014 \pm 0.014 GeV/c^2$的π介子电产生实验中获得了更新的世界平均值。我们的参数化是有用的建模$ν$在低能量的相互作用(例如,$\numu$振荡实验)。高$Q^2$的预测可以在下一代电子和$\numu$散射实验中进行测试。

英文摘要:

We present new parameterizations of vector and axial nucleon form factors. We maintain an excellent descriptions of the form factors at low momentum transfers ($Q^2$), where the spatial structure of the nucleon is important, and use the Nachtman scaling variable $ξ$ to relate elastic and inelastic form factors and impose quark-hadron duality constraints at high $Q^2$ where the quark structure dominates. We use the new vector form factors to re-extract updated values of the axial form factor from $\numu$ experiments on deuterium. We obtain an updated world average value from $\numu$d, $\numubar$H and pion electroproduction experiments of $M_{A}$ = $1.014 \pm 0.014 GeV/c^2$. Our parameterizations are useful in modeling $ν$ interactions at low energies (e.g. for $\numu$ oscillations experiments). The predictions for high $Q^2$ can be tested in the next generation electron and $\numu$ scattering 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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