arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2108.09240hep-phhep-ex
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轻子-核子散射的非弹性轴向和矢量结构函数2021更新

Inelastic Axial and Vector Structure Functions for Lepton-Nucleon Scattering 2021 Update

Arie Bodek, Un Ki Yang, Yang Xu

摘要:

我们报告了一个非弹性中微子和电子-核子散射截面的唯象模型的更新(2021),该模型使用有效的首阶部分子分布函数和一个新的标度变量$ξ_w$。在低$Q^2$下,使用$ξ_w$比例变量结合乘性$K$因子可很好地描述非微扰效应。该模型描述了从非常高的$Q^2$到非常低的$Q^2$和下至$Q^2=0$光生区的所有非弹性带电轻子核子散射数据(HERA/NMC/BCDMS/SLAC/JLab)。该模型已发展用于几GeV量级的中微子振荡实验分析。2021年的更新解释了轴向和矢量结构函数之间的差异,这使得它与中微子-核子总截面测量更好地吻合。该模型主要是为强子末态质量$W$以上1.8 GeV。然而,与其他参数的模型也描述了$average$中微子截面的共振区下降到$W$ =1.4 GeV。

英文摘要:

We report on an update (2021) of a phenomenological model for inelastic neutrino- and electron-nucleon scattering cross sections using effective leading order parton distribution functions with a new scaling variable $ξ_w$. Non-perturbative effects are well described using the $ξ_w$ scaling variable in combination with multiplicative $K$ factors at low $Q^2$. The model describes all inelastic charged-leptron-nucleon scattering data (HERA/NMC/BCDMS/SLAC/JLab) ranging from very high $Q^2$ to very low $Q^2$ and down to the $Q^2=0$ photo-production region. The model has been developed to be used in analysis of neutrino oscillation experiments in the few GeV region. The 2021 update accounts for the difference between axial and vector structure function which brings it into much better agreement with neutrino-nucleon total cross section measurements. The model has been developed primarily for hadronic final state masses $W$ above 1.8 GeV. However with additional parameters the model also describe the $average$ neutrino cross sections in the resonance region down to $W$=1.4 GeV.

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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