arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1802.01356hep-th
收藏

全息QCD中由瞬子产生的二重子

Di-Baryon from Instanton in Holographic QCD

Reona Arai

摘要:

我们在全息QCD中研究了二重子。二重子由六个夸克组成,并受色相互作用束缚。本文采用Sakai-Sugimoto(SS)模型作为全息QCD来研究二重子。SS模型是在IIA型弦论的$\mathrm{D4}/\mathrm{D8}/\overline{\mathrm{D8}}$系统中建立的。由于重子数被确定为瞬子数,因此可以用D8-膜上味对称的2-瞬子组态来描述二重子。我们将显式地构造特胡夫特2-瞬子解,并用它来讨论二重子的稳定性。该模型的一个有效作用量不仅具有Yang-Mills(YM)作用量,而且还具有来自探测D8-膜的Chern-Simons(CS)作用量,CS作用量为每个瞬子分配了与重子数相关的$U(1)$电荷.结果,我们可以看到,在SS模型中,由于这个$U(1)$电荷,重子是不稳定的。

英文摘要:

We study the di-baryon in the holographic QCD. The di-baryon is composed of six quarks and bound by the color interaction. In this paper, we adopt the Sakai-Sugimoto (SS) model as the holographic QCD to study the di-baryon. The SS model is formulated in a $\mathrm{D4}/\mathrm{D8}/\overline{\mathrm{D8}}$ system of the Type IIA string theory. It is expected that the di-baryon is described by the 2-instanton configuration of the flavor symmetry on D8-branes since the baryon number is identified as the instanton number. We will construct the 't Hooft 2-instanton solution explicitly and use it to discuss the stability of the di-baryon. An effective action of this model has not only the Yang-Mills (YM) action but also the Chern-Simons (CS) action coming from the CS action of probe D8-branes, and the CS action assigns $U(1)$ charges associated with the baryon number to each instanton. As a result, we can see that the di-baryon is unstable due to this $U(1)$ charge in the SS model.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑