arXiv 2001.065372020-01-17nucl-thhep-ph

氘的中性流中微子散射

Neutral-Current Neutrino Scattering from the Deuteron

Sabine Jeschonnek, J. W. Van Orden, T. W. Donnelly

备注：: 40 pages, 21 figures
发表信息：: Phys. Rev. C 101, 064621 (2020)
DOI：: 10.1103/PhysRevC.101.064621

摘要：

中子流中微子散射从氘核导致质子-中子的最终状态被认为是使用一种方法，采用相对论动力学，从而提供了强大的建模在相对较高的能量和动量。在这项工作中，重点放在完全排他的反应，在最终状态的质子和中子被假定为检测。这样，入射中微子的能量、中微子散射角和散射中微子的能量都可以重建出来。结果表明，对于特定的运动学选择的反应主要是通过从质子的散射进行，而对于其他的运动学选择，它主要是从中子进行。具体的不对称性介绍，重点放在这些属性。在这两个地区的测量有可能产生有价值的信息核子的电弱形状因子的动量转移高达（GeV/c）$^2$。特别是，的截面被示出是非常敏感的等腰轴向矢量形状因子，和敏感，但不那么磁奇异形状因子。与其他反应的比较，特别是电荷变化中微子反应和宇称守恒和违反电子散射，有可能提供新的方法来测试标准模型。

英文摘要：

Neutral-current neutrino scattering from the deuteron leading to proton-neutron final states is considered using an approach that incorporates relativistic dynamics and consequently provides robust modeling at relatively high energies and momenta. In this work the focus is placed on the fully exclusive reaction where both the proton and neutron in the final state are assumed to be detected. Accordingly, the incident neutrino energy, the neutrino scattering angle and the scattered neutrino's energy can all be reconstructed. It is shown that for specific choices of kinematics the reaction proceeds mainly via scattering from the proton, while for other choices of kinematics it proceeds mainly from the neutron. Specific asymmetries are introduced to focus on these attributes. Measurements in both regions have the potential to yield valuable information on the nucleon's electroweak form factors at momentum transfers up to a (GeV/c)$^2$. In particular, the cross sections are shown to be very sensitive to the isoscalar axial-vector form factor, and sensitive but less so to the magnetic strangeness form factor. Comparisons with other reactions, specifically charge-changing neutrino reactions and both parity-conserving and -violating electron scattering, have the potential to provide new ways to test the Standard Model.

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