2018/02/05 by Reona Arai, Arai, Reona
Physics and Astronomy · #Black Holes and Theoretical Physics #FOS: Physical sciences #High Energy Physics - Theory (hep-th) #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions
paper · pdf · doi:10.48550/arxiv.1802.01356
openalex publication_date 2018/02/05 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
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 D4/D8/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.