论文标题
全息QCD中$ n（1535）$的衰减属性
Decay properties of $N(1535)$ in the holographic QCD
论文作者
论文摘要
我们研究了QCD全息模型中的负平等$ n（1535）\ equiv n^*$的第一个激发状态的一个激发态衰变。激发态被描述为模型五维时空中额外的$ z $方向的振动模式。我们获得了$ g_a^{nn^*} $的轴向耦合的分析公式。离子轴向耦合是在腐烂的触发动量$ | \ boldsymbol {k} |获得的。 = 448 $ MEV作为$ g_a^{nn^*} \ sim 0.32 $，因此，部分衰减宽度$γ_{n^* \ toπn} \ sim 30 $ MEV，该$ MEV比实验数据小于但合理的。
We study one pion emission decay of the first excited state of the nucleon with negative parity $N(1535) \equiv N^*$ in the holographic model of QCD. The excited state is described as a vibrational mode along the extra $z$ direction in the five-dimensional space-time of the model. We have obtained an analytic formula for the axial coupling of $g_A^{NN^*}$. The off-diagonal axial coupling is obtained at the decaying pion momentum $|\boldsymbol{k}| = 448$ MeV as $g_A^{NN^*} \sim 0.32$, and hence a partial decay width $Γ_{N^* \to πN} \sim 30$ MeV, which is smaller than but reasonably compared to the experimental data.
