arXiv 1804.075482018-04-20nucl-thhep-ph

相对论有效质量标度模型中带电中微子的准弹性散射

Quasielastic charged-current neutrino scattering in the scaling model with relativistic effective mass

I. Ruiz Simo, V. L. Martinez-Consentino, J. E. Amaro, E. Ruiz Arriola

备注：: 16 pages, 12 figures
发表信息：: Phys. Rev. D 97, 116006 (2018)
DOI：: 10.1103/PhysRevD.97.116006

摘要：

我们利用最近从$^{12}$ C的准弹性电子散射数据的标度分析预测的准弹性电荷变化中微子散射截面内的不确定性带。我们使用的标度函数提取的$(e,e')$截面数据的选择，和一个有效的核子质量的启发相对论平均场模型的核物质。相应的相对论有效质量超标度分析（SuSAM*）描述了大量的电子数据躺在一个唯象准弹性带。有效质量包括相对论平均场产生的横向电流的增强。标度函数采用核效应超出了脉冲近似，特别是介子交换电流和短程相关产生的标度函数中的尾巴。除了它的简单性，这个模型描述的中微子数据合理，以及其他更复杂的核模型。

英文摘要：

We use a recent scaling analysis of the quasielastic electron scattering data from $^{12}$C to predict the quasielastic charge-changing neutrino scattering cross sections within an uncertainty band. We use a scaling function extracted from a selection of the $(e,e')$ cross section data, and an effective nucleon mass inspired by the relativistic mean-field model of nuclear matter. The corresponding super-scaling analysis with relativistic effective mass (SuSAM*) describes a large amount of the electron data lying inside a phenomenological quasielastic band. The effective mass incorporates the enhancement of the transverse current produced by the relativistic mean field. The scaling function incorporates nuclear effects beyond the impulse approximation, in particular meson-exchange currents and short range correlations producing tails in the scaling function. Besides its simplicity, this model describes the neutrino data as reasonably well as other more sophisticated nuclear models.

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英文摘要：

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