论文标题
QCD中$ n（1535）$的重力形式。
Gravitational form factors of $N(1535)$ in QCD
论文作者
论文摘要
我们计算具有量子数字$ i（j^p）= \ frac {1} {2} {2}（\ frac {1} {1} {2}^ - ）$的激发$ n（1535）$状态的重力形式因素。为此，我们考虑了能量量张量（EMT）电流的夸克部分，并使用核子插值场的一般形式以及$ n（1535）$的分布幅度（DAS）。随着核子和$ n（1535）$ a的夫妇均为同一电流，将$ n（1535）\ rightarrow n $引力过渡形式归因于计算，作为主要输入参数。首先，我们重新审视$ n（1535）\ rightarrow n $的过渡重力形式，然后提取$ n（1535）$兴奋状态的形式的值。我们观察到，$ n（1535）$ $ q^2 $的重力形式因素由多极拟合功能很好地描述。作为副产品，我们还计算了$ n（1535）$的中心的压力和能量密度，并估计其机械半径。
We calculate the gravitational form factors of the excited $N(1535)$ state with the quantum numbers $I(J^P)=\frac{1}{2}(\frac{1}{2}^-)$ via light cone QCD sum rules (LCSR). To this end, we consider the quark part of the energy-momentum tensor (EMT) current and use the general form of the nucleon's interpolating field as well as the distribution amplitudes (DAs) of $N(1535)$. As both the nucleon and $N(1535)$ couple to the same current, the $N(1535) \rightarrow N$ gravitational transition form factors are entered to the calculations as the main input parameters. First we revisit the transitional gravitational form factors of $N(1535) \rightarrow N$, then extract the values of the form factors of the $N(1535)$ excited state. We observe that the gravitational form factors of $N(1535)$ in terms of $Q^2$ are well described by the multipole fit function. As a byproduct, we also calculate the pressure and energy density at the center of $N(1535)$ and estimate its mechanical radius.
