2D energy-momentum tensor distributions of nucleon in a large- Nc quark model from ultrarelativistic to nonrelativistic limit
2D energy-momentum tensor distributions of nucleon in a large- Nc quark model from ultrarelativistic to nonrelativistic limit
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DOI：
10.1103/physrevd.106.014012
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发表时间：
2022-02
影响因子：
5
通讯作者：
C'edric Lorc'e;P. Schweitzer;K. Tezgin
中科院分区：
文献类型：
--
作者：
C'edric Lorc'e;P. Schweitzer;K. Tezgin
能量-动量张量（EMT）的形状因子可以在某些框架中根据能量、应力、线性和角动量的空间分布，基于2D或3D傅立叶变换来解释。这种解释通常受到“相对论反冲修正”的影响，除非核子以光速运动，例如在无限动量框架中。我们表明，这是可能的，制定一个大的N c限制，其中核子EMT分布的概率解释也在其他框架。我们使用袋模型制定的大N c限制作为一个内部一致的夸克模型框架可视化的信息内容与二维EMT分布。为了提供更多的直观性，我们在物理情况下，并在三个不同的限制：通过考虑重夸克极限，大系统尺寸极限和组分夸克极限。这些极限分布的可视化将有助于解释实验、格点QCD和其他模型或有效理论的结果。
Form factors of the energy-momentum tensor (EMT) can be interpreted in certain frames in terms of spatial distributions of energy, stress, linear and angular momentum, based on 2D or 3D Fourier transforms. This interpretation is in general subject to “relativistic recoil corrections”, except when the nucleon moves at the speed of light like e.g. in the infinite-momentum frame. We show that it is possible to formulate a large- N c limit in which the probabilistic interpretation of the nucleon EMT distributions holds also in other frames. We use the bag model formulated in the large- N c limit as an internally consistent quark model framework to visualize the information content associated with the 2D EMT distributions. In order to provide more intuition, we present results in the physical situation and in three different limits: by considering a heavy-quark limit, a large system-size limit and a constituent-quark limit. The visualizations of the distributions in these extreme limits will help to interpret the results from experiments, lattice QCD, and other models or effective theories.