A quarkyonic matter model

[2606.00943] A quarkyonic matter model Skip to main content Search Submit Donate Log in High Energy Physics - Phenomenology arXiv:2606.00943 (hep-ph) [Submitted on 31 May 2026] Title: A quarkyonic matter model Authors: Toru Kojo View PDF HTML (experimental) Abstract: Quarkyonic matter is a state of matter in dense QCD whose bulk thermodynamics is dominated by quarks, while low-energy excitations remain confined. This picture leads to a crossover description from baryonic matter to quark matter, which is triggered by the saturation of quark states in dense matter ({\it quark saturation}). The crossover driven by the quark saturation accompanies rapid growth in pressure but moderate increase in energy density, resulting in a peak in the sound speed which has been indicated by observational constraints from neutron star physics. The quark saturation can occur at a few times nuclear saturation density, which is smaller than the density at which the baryon cores of $\sim 0.5$--$0.8$ fm spatially overlap. In this contribution we discuss an ideal model of quarkyonic matter, the IdylliQ model, and we explicitly describe how the baryon and quark occupation probabilities are related, and explain how stiffening of matter occurs. The model is further applied to charge neutral matter including hyperons, and it is shown that the statistical constraints at quark level induce effective repulsion among different baryon species, mitigating the hyperon softening problem in neutron star physics. Comments: contribution to "From Quarks to Neutron Stars: Insights from kHz gravitational waves"; 12 pages, 3 figures Subjects: High Energy Physics - Phenomenology (hep-ph) ; High Energy Astrophysical Phenomena (astro-ph.HE) Cite as: arXiv:2606.00943 [hep-ph] (or arXiv:2606.00943v1 [hep-ph] for this version) https://doi.org/10.48550/arXiv.2606.00943 Focus to learn more arXiv-issued DOI via DataCite Related DOI : https://doi.org/10.1088/1361-6382/ae94d5 Focus to learn more DOI(s) linking to related resources Submission history From: Toru Kojo [ view email ] [v1] Sun, 31 May 2026 01:13:48 UTC (651 KB) Full-text links: Access Paper: View PDF HTML (experimental) TeX Source view license Current browse context: hep-ph < prev | next > new | recent | 2026-06 Change to browse by: astro-ph astro-ph.HE References & Citations INSPIRE HEP SciX Google Scholar Semantic Scholar export BibTeX citation Bookmark Bibliographic Tools Bibliographic and Citation Tools Bibliographic Explorer Toggle Bibliographic Explorer ( What is the Explorer? ) Connected Papers Toggle Connected Papers ( What is Connected Papers? ) Litmaps Toggle Litmaps ( What is Litmaps? ) scite.ai Toggle scite Smart Citations ( What are Smart Citations? ) Code, Data, Media Code, Data and Media Associated with this Article alphaXiv Toggle alphaXiv ( What is alphaXiv? ) Links to Code Toggle CatalyzeX Code Finder for Papers ( What is CatalyzeX? ) DagsHub Toggle DagsHub ( What is DagsHub? ) GotitPub Toggle Gotit.pub ( What is GotitPub? ) Huggingface Toggle Hugging Face ( What is Huggingface? ) ScienceCast Toggle ScienceCast ( What is ScienceCast? ) Demos Demos Replicate Toggle Replicate ( What is Replicate? ) Spaces Toggle Hugging Face Spaces ( What is Spaces? ) Spaces Toggle TXYZ.AI ( What is TXYZ.AI? ) Related Papers Recommenders and Search Tools Link to Influence Flower Influence Flower ( What are Influence Flowers? ) Core recommender toggle CORE Recommender ( What is CORE? ) IArxiv recommender toggle IArxiv Recommender ( What is IArxiv? ) Author Venue Institution Topic About arXivLabs arXivLabs: experimental projects with community collaborators arXivLabs is a framework that allows collaborators to develop and share new arXiv features directly on our website. Both individuals and organizations that work with arXivLabs have embraced and accepted our values of openness, community, excellence, and user data privacy. arXiv is committed to these values and only works with partners that adhere to them. Have an idea for a project that will add value for arXiv's community? Learn more about arXivLabs . Which authors of this paper are endorsers? | Disable MathJax ( What is MathJax? ) We gratefully acknowledge support from our major funders , member institutions , and all contributors. About · Help · Contact · Subscribe · Copyright · Privacy · Accessibility · Operational Status (opens in new tab)

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