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arXiv 0909.1996hep-ex
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μ子中微子荷电电流准弹性(CCQE)双微分截面的首次测量

First Measurement of Muon Neutrino Charged Current Quasielastic (CCQE) Double Differential Cross Section

Teppei Katori

摘要:

利用一个高统计样本的μ中微子荷电流准弹性(CCQE)事件,我们报告的双微分截面作为μ子能量和角度的函数,这个过程的第一次测量。结果的特点减少了模型的依赖性,并提供了迄今为止最完整的中微子CCQE散射的信息。测量的绝对截面作为中微子能量的函数和单微分截面作为4-动量转移平方的函数,主要是为了方便与以前的测量比较。这些数据对于理解核子的轴向矢量形状因子以及改进低能中微子与核靶相互作用的模拟特别有用,这对于寻找中微子振荡的实验特别相关。

英文摘要:

Using a high statistics sample of muon neutrino charged current quasielastic (CCQE) events, we report the first measurement of the double differential cross section as a function of muon energy and angle for this process. The result features reduced model dependence and supplies the most complete information on neutrino CCQE scattering to date. Measurements of the absolute cross section as a function of neutrino energy and the single differential cross section as a function of 4-momentum transfer squared are also provided, largely to facilitate comparison with prior measurements. This data is of particular use for understanding the axial-vector form factor of the nucleon as well as improving the simulation of low energy neutrino interactions on nuclear targets, which is of particular relevance for experiments searching for neutrino oscillations.

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