Properties of stable massive quark stars in holography

IF 4.9 2区物理与天体物理 Q2 PHYSICS, PARTICLES & FIELDS

The European Physical Journal C Pub Date : 2026-09-22 DOI:10.1140/epjc/s10052-026-16338-z

Kazem Bitaghsir Fadafan, Jesús Cruz Rojas, Jonas Mager

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Abstract

We study a holographic D3/D7 system, whose dilaton profile has been phenomenologically adjusted in the infrared. The model is used to describe a deconfined yet massive quark phase of QCD at finite density, concluding that the equation of state of such a phase can be stiff enough to support exotic dense stars as massive as 2 solar masses. Nucleons are modeled phenomenologically using the Hebeler et al. EFT baryon phases. For the stiff phenomenological baryon phases the transition to the quark phase is weakly first order allowing for stable quark cores. We also find that holographic baryons, modeled as wrapped D5-branes, provide unrealistic pressures (in the homogeneous approximation) and have to be discarded. We compute the mass vs. radius relation and tidal deformability for these hybrid stars. Contrary to a large number of other holographic models, this holographic model indicates that quark matter could be present at the core of heavy compact stars and may be used to explore the phenomenology of such objects.

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全息术中稳定大质量夸克星的性质。

我们研究了一个全息D3/D7系统，它的膨胀曲线在红外上进行了现象学调整。该模型用于描述有限密度下QCD的一个已定义的大质量夸克相，并得出结论，该相的状态方程可以足够坚硬，以支持质量为2个太阳质量的奇异致密恒星。用Hebeler等人的理论对核子进行了现象学建模。EFT重子相。对于硬现象学重子相，向夸克相的过渡是弱一级的，允许稳定的夸克核。我们还发现，以包裹的d5膜为模型的全息重子提供了不切实际的压力（在均匀近似下），必须被丢弃。我们计算了这些混合恒星的质量-半径关系和潮汐变形能力。与大量其他全息模型相反，这个全息模型表明，夸克物质可能存在于重致密恒星的核心，并可能用于探索这类物体的现象学。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

The European Physical Journal C 物理-物理：粒子与场物理

CiteScore

8.10

自引率

15.90%

发文量

1008

审稿时长

2-4 weeks

期刊介绍： Experimental Physics I: Accelerator Based High-Energy Physics Hadron and lepton collider physics Lepton-nucleon scattering High-energy nuclear reactions Standard model precision tests Search for new physics beyond the standard model Heavy flavour physics Neutrino properties Particle detector developments Computational methods and analysis tools Experimental Physics II: Astroparticle Physics Dark matter searches High-energy cosmic rays Double beta decay Long baseline neutrino experiments Neutrino astronomy Axions and other weakly interacting light particles Gravitational waves and observational cosmology Particle detector developments Computational methods and analysis tools Theoretical Physics I: Phenomenology of the Standard Model and Beyond Electroweak interactions Quantum chromo dynamics Heavy quark physics and quark flavour mixing Neutrino physics Phenomenology of astro- and cosmoparticle physics Meson spectroscopy and non-perturbative QCD Low-energy effective field theories Lattice field theory High temperature QCD and heavy ion physics Phenomenology of supersymmetric extensions of the SM Phenomenology of non-supersymmetric extensions of the SM Model building and alternative models of electroweak symmetry breaking Flavour physics beyond the SM Computational algorithms and tools...etc.