论文标题
轻锥QCD中超子的重力形式因素
Gravitational form factors of hyperons in light-cone QCD
论文作者
论文摘要
超子的重力形式因子的夸克部分是通过轻单QCD总规则来计算的。在计算中，使用了$σ$，$ξ$和$λ$的分布幅度（DAS）以及其插值电流的一般形式以及能量巨头张量电流的夸克部分。这些形式可以提供有关其质量和角度动量，能量和压力内部质量和分布的信息。可以获得超子重力形式因子的$ q^2 $依赖项，以多极拟合函数为特征。使用这些形式的拟合，获得了某些机械性能，例如Hyperons的机械半径以及这些颗粒中心的压力和能量分布。获得的结果可以帮助我们更好地理解这些重子的内部结构和QCD作为强相互作用的理论。
The quark parts of the gravitational form factors of hyperons are calculated by means of the light-cone QCD sum rule. In the calculations, the distribution amplitudes (DAs) of $Σ$, $Ξ$ and $Λ$ together with the general forms of their interpolating currents as well as the quark part of the energy-momentum tensor current are used. These form factors can provide information on their mass and distributions of the angular momentum, energy and pressure inside the hyperons. It is obtained that the $Q^2$ dependencies of the hyperon gravitational form factors are nicely characterized by a multipole fit function. Using the fits of these form factors, some mechanical properties such as the mechanical radius of the hyperons and the pressure and energy distributions at the center of these particles are obtained. The obtained results can help us in better understanding of the internal structures of these baryons and the QCD as theory of the strong interaction.
