A low-dimensional analogue of holographic baryons

Abstract

Baryons in holographic QCD correspond to topological solitons in the bulk. The most prominent example is the Sakai-Sugimoto model, where the bulk soliton in the five-dimensional spacetime of AdS-type can be approximated by the flat space self-dual Yang-Mills instanton with a small size. Recently, the validity of this approximation has been verified by comparison with the numerical field theory solution. However, multi-solitons and solitons with finite density are currently beyond numerical field theory computations. Various approximations have been applied to investigate these important issues and have led to proposals for finite density configurations that include dyonic salt and baryonic popcorn. Here we introduce and investigate a low-dimensional analogue of the Sakai-Sugimoto model, in which the bulk soliton can be approximated by a flat space sigma model instanton. The bulk theory is a baby Skyrme model in a three-dimensional spacetime with negative curvature. The advantage of the lower-dimensional theory is that numerical simulations of multi-solitons and finite density solutions can be performed and compared with flat space instanton approximations. In particular, analogues of dyonic salt and baryonic popcorn configurations are found and analysed.

16 pages, 6 figures

References in corpus (5)

• Chiral Dynamics of Baryons from String Theory
• Instanton constituents in the O(3) model at finite temperature
• The Sakai-Sugimoto soliton
• Dimension Changing Phase Transitions in Instanton Crystals
• Baby Skyrmions stabilized by vector mesons

Cited by in corpus (14)

• Confining Dyon-Anti-Dyon Coulomb Liquid Model I
• Light Quarks in the Screened Dyon-Anti-Dyon Coulomb Liquid Model II
• Ordered arrays of Baryonic tubes in the Skyrme model in (3+1) dimensions at finite density
• Baby Skyrme Model, Near-BPS Approximations and Supersymmetric Extensions
• Gauged Baby Skyrme Model with Chern-Simons term
• A Solitonic Approach to Holographic Nuclear Physics
• Holographic Nuclear Physics with Massive Quarks
• Instanton Bags, High Density Holographic QCD and Chiral Symmetry Restoration
• Analytic Baby Skyrmions at Finite Density
• Baryon Superfluids in AdS/CFT with Flavor
• Salty popcorn in a homogeneous low-dimensional toy model of holographic QCD
• Nuclear binding energy in holographic QCD
• Phases and approximations of baryonic popcorn in a low-dimensional analogue of holographic QCD
• Multi-Skyrmions on $Ad{S}_2\times S_2$, Rational maps and Popcorn Transitions