论文标题
全息QCD中的拓扑对象
Topological Objects in Holographic QCD
论文作者
论文摘要
我们基于Sakai-Sugimoto模型研究全息QCD的拓扑对象，该模型由$ n_c $ d4 branes和$ n_f $ d8/$ \ bar {\ rm d8} $ branes in SuperString理论构建，并且是标准的，等于1+3 Dimensionals subersional supersionals superrareed。使用量规/重力二元性，全息QCD被描述为具有背景重力的风味空间中的1+4维u（$ n_f $）量规理论，其Instanton溶液对应于Baryons。首先，使用Witten Ansatz，我们将全息QCD降低到弯曲空间中的1+2维Abelian Higgs理论，并考虑其拓扑方面。我们从数值上获取Abrikosov涡流解决方案并研究单个Baryon特性。其次，我们研究了全息QCD中的一个梅隆和两个梅隆。在全息QCD中，发现携带半固定器重子数的单一梅隆也具有无限能量。我们在全息QCD的额外方向上提出了两人振荡的新型重子激发。
We study topological objects in holographic QCD based on the Sakai-Sugimoto model, which is constructed with $N_c$ D4 branes and $N_f$ D8/$\bar{\rm D8}$ branes in the superstring theory, and is infrared equivalent to 1+3 dimensional massless QCD. Using the gauge/gravity duality, holographic QCD is described as 1+4 dimensional U($N_f$) gauge theory in flavor space with a background gravity, and its instanton solutions correspond to baryons. First, using the Witten Ansatz, we reduce holographic QCD into a 1+2 dimensional Abelian Higgs theory in a curved space and consider its topological aspect. We numerically obtain the Abrikosov vortex solution and investigate single baryon properties. Second, we study a single meron and two merons in holographic QCD. The single meron carrying a half-integer baryon number is found to have a infinite energy also in holographic QCD. We propose a new-type baryon excitation of the two-merons oscillation in the extra-direction of holographic QCD.
