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arXiv 2202.11892hep-phnucl-th
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$x \gtrsim 1$区轻子核DIS的核介质效应

Nuclear medium effects in lepton-nucleus DIS in the region of $x \gtrsim 1$

M. Sajjad Athar, S. K. Singh, F. Zaidi

摘要:

在包括$x\ge 1$在内的大$x$区,研究了带电轻子和中微子与核靶深度非弹性散射(DIS)的原子核结构函数和微分截面中的核介质效应.利用微观场论模型计算的核子谱函数,考虑了费米运动引起的核介质效应、核子结合能和核子关联。用次-次-领先阶(NNLO)计算的核子结构函数和核子部分子分布函数(PDFs)的MMHT参数化,得到了核结构函数和散射截面的数值计算结果,并与Jefferson实验室(JLab)和SLAC核物理装置(SLAC)的电子散射实验数据进行了比较。NPAS)。在中微子散射的情况下,结果是相关的理解DIS的贡献,最近的包容截面的主注入中微子实验研究的v-A相互作用(MINERvA)测量以及理论预测深地下中微子实验(DUNE)。还讨论了等标度修正在较重核靶中的重要性以及运动学切割对CM能量$W$的影响。

英文摘要:

The nuclear medium effects in the nuclear structure functions and differential cross sections in the deep inelastic scattering (DIS) of charged lepton and neutrino from nuclear targets are studied in the region of large $x$ including $x\ge 1$. The nuclear medium effects due to the Fermi motion and the binding energy of nucleons and the nucleon correlations are included using nucleon spectral function calculated in a microscopic field theoretical model. The numerical results for the nuclear structure functions and the cross sections are obtained using the nucleon structure function evaluated at the next-to-next-to-leading order (NNLO) with the Martin-Motylinski-Harland Lang-Thorne (MMHT) parameterization of the nucleonic parton distribution functions (PDFs) and are compared with the available experimental data on electron scattering from the Jefferson Lab (JLab) and SLAC Nuclear Physics Facility (NPAS). In the case of neutrino scattering the results are relevant for understanding the DIS contributions to the recent inclusive cross sections measured by the Main Injector Neutrino ExpeRiment to study v-A interactions (MINERvA) as well as theoretical predictions are made for Deep Underground Neutrino Experiment (DUNE). The importance of isoscalarity corrections in heavier nuclear targets as well as the effect of the kinematic cut on the CM energy $W$ in defining the DIS region have also been discussed.

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