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arXiv 0706.0926hep-exnucl-ex
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μ子中微子在碳表面准弹性散射的测量

Measurement of Muon Neutrino Quasi-Elastic Scattering on Carbon

MiniBooNE collaboration

摘要:

对中微子振荡的观测是物理学超越标准模型的明确证据。为了精确测量这种现象,包括MiniBooNE在内的中微子振荡实验需要精确描述中微子带电电流准弹性(CCQE)截面,以预测信号样本。MiniBooNE使用μ子中微子CCQE事件的高统计样本,发现一个简单的费米气体模型,经过适当的调整,准确地描述了在碳基探测器中观察到的CCQE事件。提取的参数包括一个有效轴向质量M_A^eff = 1.23+/-0.20 GeV,它描述了核子轴向矢量形状因子与四动量的依赖关系;以及一个保利抑制参数kappa = 1.019+/-0.011。这样一个修正的费米气体模型也可以用于未来的基于加速器的实验,测量核目标上的中微子振荡。

英文摘要:

The observation of neutrino oscillations is clear evidence for physics beyond the standard model. To make precise measurements of this phenomenon, neutrino oscillation experiments, including MiniBooNE, require an accurate description of neutrino charged current quasi-elastic (CCQE) cross sections to predict signal samples. Using a high-statistics sample of muon neutrino CCQE events, MiniBooNE finds that a simple Fermi gas model, with appropriate adjustments, accurately characterizes the CCQE events observed in a carbon-based detector. The extracted parameters include an effective axial mass, M_A^eff = 1.23+/-0.20 GeV, that describes the four-momentum dependence of the axial-vector form factor of the nucleon; and a Pauli-suppression parameter, kappa = 1.019+/-0.011. Such a modified Fermi gas model may also be used by future accelerator-based experiments measuring neutrino oscillations on nuclear targets.

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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