Lattice QCD Constraints on the Parton Distribution Functions of He3
Lattice QCD Constraints on the Parton Distribution Functions of He3
复制标题
He3 帕顿分布函数的格子 QCD 约束
DOI：
10.1103/physrevlett.126.202001
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发表时间：
2021
影响因子：
8.6
通讯作者：
Winter, Frank
中科院分区：
文献类型：
--
作者：
Detmold, William;Illa, Marc;Murphy, David J.;Oare, Patrick;Orginos, Kostas;Shanahan, Phiala E.;Wagman, Michael L.;Winter, Frank
首次使用晶格 QCD 确定了 和 夸克的等矢量组合所携带的纵向动量的分数。从相应夸克质量的计算中发现，这种组合与组成核子的比例在百分之几的水平上是一致的。通过对物理夸克质量的简单外推，该约束与通过 nnnpdf 框架拟合的全局核部分子分布函数的确定一致，并且更精确。因此，具体证明了轻核的晶格 QCD 计算具有迫在眉睫的潜力，可以更精确地确定轻核中的 和 部分子分布，并揭示 EMC 效应的 QCD 起源。
The fraction of the longitudinal momentum ofthat is carried by the isovector combination ofandquarks is determined using lattice QCD for the first time. The ratio of this combination to that in the constituent nucleons is found to be consistent with unity at the few-percent level from calculations with quark masses corresponding to. With a naive extrapolation to the physical quark masses, this constraint is consistent with, and more precise than, determinations from global nuclear parton distribution function fits through the nnnpdfframework. It is thus concretely demonstrated that lattice QCD calculations of light nuclei have imminent potential to enable more precise determinations of theandparton distributions in light nuclei and to reveal the QCD origins of the EMC effect.