Topological Objects in Holographic QCD

Abstract

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/$\overline{D8}$ 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.

arXiv comment16 pages, 6 figures

References in corpus (13)

• Dirichlet-Branes and Ramond-Ramond Charges
• Low energy hadron physics in holographic QCD
• More on a holographic dual of QCD
• Baryons from instantons in holographic QCD
• Chiral Dynamics of Baryons from String Theory
• Holographic Baryons : Static Properties and Form Factors from Gauge/String Duality
• Baryons in Holographic QCD
• The Sakai-Sugimoto soliton
• Brane-induced Skyrmion on S^3: baryonic matter in holographic QCD
• Long-distance properties of baryons in the Sakai-Sugimoto model
• Holographic Baryons from Oblate Instantons
• Holographic QCD for H-dibaryon (uuddss)
• A Study of the H-dibaryon in Holographic QCD

Cited by in corpus (6)

• Nucleon D-term in holographic QCD
• Gravitational form factors of pion from top-down holographic QCD
• Energy-Momentum Tensor and D-term of Baryons in Top-down Holographic QCD
• Gravitating Meron-like topological solitons in massive Yang-Mills theory and the Einstein-Skyrme model
• Scalar-glueball-mediated scale-anomaly dominance of the confining pressure of the pion in holographic QCD
• Numerical analysis of a baryon and its dilatation modes in holographic QCD