Stringy excited baryons in holographic quantum chromodynamics
Stringy excited baryons in holographic quantum chromodynamics
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全息量子色动力学中的弦激发重子
DOI：
10.1093/ptep/ptaa045
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发表时间：
2020
影响因子：
3.5
通讯作者：
Sugimoto Shigeki
中科院分区：
文献类型：
--
作者：
Hayashi Yasuhiro;Ogino Takahiro;Sakai Tadakatsu;Sugimoto Shigeki
我们分析了重子激发态使用全息对偶的量子色动力学是定义在相交的D4/D8膜系统的基础上。在这个模型中，重子的研究是把它们看作是五维弯曲时空上规范理论的拓扑孤立子。然而，这只允许我们得到某一类重子。我们试图提出一个框架，使一整套激发重子可以在一个系统的方式处理。这是通过采用维滕的原始想法来实现的，该想法指出，重子是由一个系统组成的开弦从重子顶点发出。我们认为，这个系统可以制定一个Atiyah-Drinfeld-Hitchin-Manin型矩阵模型的桥本饭冢-Yi连同一个无限的塔的开弦质量模式。利用这个装置，我们计算了重子激发态的能谱，并与实验数据进行了比较。特别是，我们推导出核子雷奇轨迹的公式，假设位于轨迹上的受激核子的特征是连接在重子顶点上的单个开弦的激发。
We analyze excited baryon states using a holographic dual of quantum chromodynamics that is defined on the basis of an intersecting D4/D8-brane system. Studies of baryons in this model have been made by regarding them as a topological soliton of a gauge theory on a five-dimensional curved spacetime. However, this allows one to obtain only a certain class of baryons. We attempt to present a framework such that a whole set of excited baryons can be treated in a systematic way. This is achieved by employing the original idea of Witten, which states that a baryon is described by a system composed ofopen strings emanating from a baryon vertex. We argue that this system can be formulated by an Atiyah–Drinfeld–Hitchin–Manin-type matrix model of Hashimoto–Iizuka–Yi together with an infinite tower of the open string massive modes. Using this setup, we work out the spectra of excited baryons and compare them with the experimental data. In particular, we derive a formula for the nucleon Regge trajectory assuming that the excited nucleons lying on the trajectory are characterized by the excitation of a single open string attached on the baryon vertex.