arXiv 1607.084512016-07-28nucl-thhep-ph

中微子散射中中子-质子和质子-质子对的辐射

Emission of neutron-proton and proton-proton pairs in neutrino scattering

I. Ruiz Simo, J. E. Amaro, M. B. Barbaro, A. De Pace, J. A. Caballero, G. D. Megias, T. W. Donnelly

备注：: 9 pages and 8 figures
DOI：: 10.1016/j.physletb.2016.09.021

摘要：

本文利用最近发展起来的相对论介子交换流模型计算了$^{12}$ C在2 p-2 h通道中与$(ν_μ,μ^-)$散射的中子-质子和质子-质子产额。我们用相对论性费米气体模型计算了从中到高动量转移的不同运动学过程的响应函数和截面。我们发现一个大的贡献，在初始状态的中子质子配置，质子质子对相比。在电荷变化中微子散射的情况下，质子-质子发射的2 p-2 h截面（{ \it，}初始状态下的np）比中子-质子发射（{ \it，即，}初始状态下的两个中子）通过$(ω,q)$依赖因子。在我们的模型中，不同种类的核子对的不同发射几率仅由介子交换流产生，主要是由$Δ$等压线流产生。我们还分析了其他影响，包括交换的贡献和轴向和矢量电流的效果。

英文摘要：

We use a recently developed model of relativistic meson-exchange currents to compute the neutron-proton and proton-proton yields in $(ν_μ,μ^-)$ scattering from $^{12}$C in the 2p-2h channel. We compute the response functions and cross sections with the relativistic Fermi gas model for different kinematics from intermediate to high momentum transfers. We find a large contribution of neutron-proton configurations in the initial state, as compared to proton-proton pairs. In the case of charge-changing neutrino scattering the 2p-2h cross section of proton-proton emission ({\it i.e.,} np in the initial state) is much larger than for neutron-proton emission ({\it i.e.,} two neutrons in the initial state) by a $(ω,q)$-dependent factor. The different emission probabilities of distinct species of nucleon pairs are produced in our model only by meson-exchange currents, mainly by the $Δ$ isobar current. We also analyze other effects including exchange contributions and the effect of the axial and vector currents.

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。

摘要：

英文摘要：

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