QCD axions and domain walls in hot and dense matter of compact stars.
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| Title: | QCD axions and domain walls in hot and dense matter of compact stars. |
|---|---|
| Authors: | Lu, Zhen-Yan1 (AUTHOR) luzhenyan@hnust.edu.cn, Wang, Shu-Peng1 (AUTHOR) wsp@mail.hnust.edu.cn, Lu, Qi2,3 (AUTHOR) luqi0@buaa.edu.cn, Zhang, Bo-Nan4 (AUTHOR) zhangbn@lzu.edu.cn, Ruggieri, Marco5,6 (AUTHOR) marco.ruggieri@dfa.unict.it |
| Source: | European Physical Journal C -- Particles & Fields. Dec2025, Vol. 85 Issue 12, p1-9. 9p. |
| Subjects: | Axions, Compact objects (Astronomy), Properties of matter, Equilibrium, Chirality of nuclear particles, Topological defects (Physics) |
| Abstract: | In compact stellar environments, the stability of dense QCD matter requires the simultaneous fulfillment of charge neutrality and beta equilibrium. In this work, we study how temperature and finite chemical potential affect QCD topology and axion properties within this medium, analyzing both cases with and without the charge neutrality condition. Our results show that the topological susceptibility and axion properties are highly sensitive to the critical behavior of the chiral phase transition in both cases. In particular, the axion mass is strongly suppressed near the transition, while the axion self-coupling constant develops a pronounced peak whose magnitude depends on the temperature and density of the medium. Remarkably, around the critical point at T ≃ 70 MeV and μ ≃ 346 MeV, the self-coupling constant is enhanced by more than a factor of seven compared to its vacuum value, a feature that to the best of our knowledge has not been reported in previous studies. Such a strong amplification at the phase boundary indicates that axion-mediated interactions could play an important role in shaping the structure and stability of compact stars, with potential implications for their evolution and observable astrophysical signatures. [ABSTRACT FROM AUTHOR] |
| Copyright of European Physical Journal C -- Particles & Fields is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
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| Header | DbId: egs DbLabel: Engineering Source An: 190943092 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: QCD axions and domain walls in hot and dense matter of compact stars. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Lu%2C+Zhen-Yan%22">Lu, Zhen-Yan</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> luzhenyan@hnust.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Wang%2C+Shu-Peng%22">Wang, Shu-Peng</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> wsp@mail.hnust.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Lu%2C+Qi%22">Lu, Qi</searchLink><relatesTo>2,3</relatesTo> (AUTHOR)<i> luqi0@buaa.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Zhang%2C+Bo-Nan%22">Zhang, Bo-Nan</searchLink><relatesTo>4</relatesTo> (AUTHOR)<i> zhangbn@lzu.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Ruggieri%2C+Marco%22">Ruggieri, Marco</searchLink><relatesTo>5,6</relatesTo> (AUTHOR)<i> marco.ruggieri@dfa.unict.it</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22European+Physical+Journal+C+--+Particles+%26+Fields%22">European Physical Journal C -- Particles & Fields</searchLink>. Dec2025, Vol. 85 Issue 12, p1-9. 9p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Axions%22">Axions</searchLink><br /><searchLink fieldCode="DE" term="%22Compact+objects+%28Astronomy%29%22">Compact objects (Astronomy)</searchLink><br /><searchLink fieldCode="DE" term="%22Properties+of+matter%22">Properties of matter</searchLink><br /><searchLink fieldCode="DE" term="%22Equilibrium%22">Equilibrium</searchLink><br /><searchLink fieldCode="DE" term="%22Chirality+of+nuclear+particles%22">Chirality of nuclear particles</searchLink><br /><searchLink fieldCode="DE" term="%22Topological+defects+%28Physics%29%22">Topological defects (Physics)</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: In compact stellar environments, the stability of dense QCD matter requires the simultaneous fulfillment of charge neutrality and beta equilibrium. In this work, we study how temperature and finite chemical potential affect QCD topology and axion properties within this medium, analyzing both cases with and without the charge neutrality condition. Our results show that the topological susceptibility and axion properties are highly sensitive to the critical behavior of the chiral phase transition in both cases. In particular, the axion mass is strongly suppressed near the transition, while the axion self-coupling constant develops a pronounced peak whose magnitude depends on the temperature and density of the medium. Remarkably, around the critical point at T ≃ 70 MeV and μ ≃ 346 MeV, the self-coupling constant is enhanced by more than a factor of seven compared to its vacuum value, a feature that to the best of our knowledge has not been reported in previous studies. Such a strong amplification at the phase boundary indicates that axion-mediated interactions could play an important role in shaping the structure and stability of compact stars, with potential implications for their evolution and observable astrophysical signatures. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of European Physical Journal C -- Particles & Fields is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1140/epjc/s10052-025-15107-8 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 9 StartPage: 1 Subjects: – SubjectFull: Axions Type: general – SubjectFull: Compact objects (Astronomy) Type: general – SubjectFull: Properties of matter Type: general – SubjectFull: Equilibrium Type: general – SubjectFull: Chirality of nuclear particles Type: general – SubjectFull: Topological defects (Physics) Type: general Titles: – TitleFull: QCD axions and domain walls in hot and dense matter of compact stars. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Lu, Zhen-Yan – PersonEntity: Name: NameFull: Wang, Shu-Peng – PersonEntity: Name: NameFull: Lu, Qi – PersonEntity: Name: NameFull: Zhang, Bo-Nan – PersonEntity: Name: NameFull: Ruggieri, Marco IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 12 Text: Dec2025 Type: published Y: 2025 Identifiers: – Type: issn-print Value: 14346044 Numbering: – Type: volume Value: 85 – Type: issue Value: 12 Titles: – TitleFull: European Physical Journal C -- Particles & Fields Type: main |
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