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Title: Brane-induced Skyrmion on S{sup 3}: Baryonic matter in holographic QCD

We study baryonic matter in holographic QCD with D4/D8/D8 multi-D brane system in type IIA superstring theory. The baryon is described as the 'brane-induced Skyrmion', which is a topologically nontrivial chiral soliton in the four-dimensional meson effective action induced by holographic QCD. We employ the ''truncated-resonance model'' approach for the baryon analysis, including pion and {rho} meson fields below the ultraviolet cutoff scale M{sub KK}{approx}1 GeV, to keep the holographic duality with QCD. We describe the baryonic matter in large N{sub c} as single brane-induced Skyrmion on the three-dimensional closed manifold S{sup 3} with finite radius R. The interactions between baryons are simulated by the curvature of the closed manifold S{sup 3}, and the decrease of the size of S{sup 3} represents the increase of the total baryon-number density in the medium in this modeling. We investigate the energy density, the field configuration, the mass and the root-mean-square radius of single baryon on S{sup 3} as the function of its radius R. We find a new picture of 'pion dominance' near the critical density in the baryonic matter, where all the (axial) vector meson fields disappear and only the pion fields survive. We also find the swelling phenomena of themore » baryons as the precursor of the deconfinement, and propose the mechanism of the swelling in the general context of QCD. The properties of the deconfinement and the chiral symmetry restoration in the baryonic matter are examined by taking the proper order parameters. We also compare our truncated-resonance model with another instanton description of the baryon in holographic QCD, considering the role of cutoff scale M{sub KK}.« less
Authors:
; ;  [1] ;  [2] ;  [3]
  1. Research Center for Nuclear Physics (RCNP), Osaka University, Mihogaoka 10-1, Ibaraki, Osaka 567-0047 (Japan)
  2. (Japan)
  3. (United States)
Publication Date:
OSTI Identifier:
21259854
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. D, Particles Fields; Journal Volume: 79; Journal Issue: 2; Other Information: DOI: 10.1103/PhysRevD.79.026005; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; AXIAL VECTOR MESONS; BARYON NUMBER; BARYONS; CHIRAL SYMMETRY; CHIRALITY; COMPARATIVE EVALUATIONS; DUALITY; ENERGY DENSITY; EXPANSION; FOUR-DIMENSIONAL CALCULATIONS; GEV RANGE 01-10; HOLOGRAPHY; INSTANTONS; MESONS; PIONS; QUANTUM CHROMODYNAMICS; SIMULATION; SOLITONS; SUPERSTRING MODELS; THREE-DIMENSIONAL CALCULATIONS