2021/05/31 by Nicolás Kovensky, Nicolas Kovensky, Andreas Schmitt · 33 citations
Physics and Astronomy · #Asymmetry #Baryogenesis #Baryon #Baryon asymmetry #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Isospin #Nuclear physics #Particle physics #Physics #Pion #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Theoretical physics #hep-ph #hep-th #nucl-th
paper · pdf · open access · doi:10.21468/scipostphys.11.2.029
published in SciPost Physics 11(2) (SciPost.org) · 53 pages, 8 figures, v2: minor improvements in the text, format adapted to SciPost Physics; v3: typos in Eqs.(20) and (30c) corrected
openalex publication_date 2021/08/12 · arxiv created 2022/02/28 · arxiv updated 2022/03/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We study baryonic matter with isospin asymmetry, including fully dynamically its interplay with pion condensation. To this end, we employ the holographic Witten-Sakai-Sugimoto model and the so-called homogeneous ansatz for the gauge fields in the bulk to describe baryonic matter. Within the confined geometry and restricting ourselves to the chiral limit, we map out the phase structure in the presence of baryon and isospin chemical potentials, showing that for sufficiently large chemical potentials condensed pions and isospin-asymmetric baryonic matter coexist. We also present first results of the same approach in the deconfined geometry and demonstrate that this case, albeit technically more involved, is better suited for comparisons with and predictions for real-world QCD. Our study lays the ground for future improved holographic studies aiming towards a realistic description of charge neutral, beta-equilibrated matter in compact stars, and also for more refined comparisons with lattice studies at nonzero isospin chemical potential.