Layers of deformed instantons in holographic baryonic matter
arXiv:1606.00675 · doi:10.1007/JHEP07(2016)001
Abstract
We discuss homogeneous baryonic matter in the decompactified limit of the Sakai-Sugimoto model, improving existing approximations based on flat-space instantons. We allow for an anisotropic deformation of the instantons in the holographic and spatial directions and for a density-dependent distribution of arbitrarily many instanton layers in the bulk. Within our approximation, the baryon onset turns out to be a second-order phase transition, at odds with nature, and there is no transition to quark matter at high densities, at odds with expectations from QCD. This changes when we impose certain constraints on the shape of single instantons, motivated by known features of holographic baryons in the vacuum. Then, a first-order baryon onset and chiral restoration at high density are possible, and at sufficiently large densities two instanton layers are formed dynamically. Our results are a further step towards describing realistic, strongly interacting matter over a large density regime within a single model, desirable for studies of compact stars.
37 pages, 7 figures, v2: two panels added to fig. 5, version to appear in JHEP
References in corpus (12)
- Color superconductivity in dense quark matter
- Inverse magnetic catalysis in dense holographic matter
- Cold Nuclear Matter In Holographic QCD
- Holographic Nuclear Physics
- Sakai-Sugimoto model, Tachyon Condensation and Chiral symmetry Breaking
- Quark mass and condensate in HQCD
- Stringy NJL and Gross-Neveu models at finite density and temperature
- The string/gauge theory correspondence in QCD
- Quark Mass Deformation of Holographic Massless QCD
- Dense Holographic QCD in the Wigner-Seitz Approximation
- Comments on Baryons in Holographic QCD
- Explicit flavor symmetry breaking and holographic compact stars
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