دورية أكاديمية
$$\kappa $$ κ -Dirac stars
| العنوان: | $$\kappa $$ κ -Dirac stars |
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| المؤلفون: | Shi-Xian Sun, Si-Yuan Cui, Long-Xing Huang, Tie-Feng Fang, Yong-Qiang Wang |
| المصدر: | European Physical Journal C: Particles and Fields, Vol 84, Iss 7, Pp 1-10 (2024) |
| بيانات النشر: | SpringerOpen, 2024. |
| سنة النشر: | 2024 |
| المجموعة: | LCC:Astrophysics LCC:Nuclear and particle physics. Atomic energy. Radioactivity |
| مصطلحات موضوعية: | Astrophysics, QB460-466, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798 |
| الوصف: | Abstract In this paper, we construct a Dirac star model composed of $$|\kappa |$$ | κ | pairs of spinor fields. The azimuthal harmonic indices m of these spinor fields are half-integers, and they satisfy $$-(|\kappa |-\frac{1}{2})\le m \le |\kappa |-\frac{1}{2}$$ - ( | κ | - 1 2 ) ≤ m ≤ | κ | - 1 2 . When $$\kappa =1$$ κ = 1 , it corresponds to the conventional Dirac star model, formed by two spinor fields with $$m=\frac{1}{2}$$ m = 1 2 and $$m=-\frac{1}{2}$$ m = - 1 2 . When $$|\kappa |>1$$ | κ | > 1 , among these $$|\kappa |$$ | κ | pairs of spinor fields, there exist spinor fields with azimuthal harmonic indices $$m>\frac{1}{2}$$ m > 1 2 , and all spinor fields still conform to the same Dirac field equation. Different families of solutions are distinguished by the value of $$\kappa $$ κ , so we named these solutions $$\kappa $$ κ -Dirac stars. We obtain solutions for $$\kappa =\pm 1,\pm 2,\pm 3,\pm 4,\pm 5,\pm 6$$ κ = ± 1 , ± 2 , ± 3 , ± 4 , ± 5 , ± 6 by using numerical methods. Additionally, we compute their ADM mass M, Noether charge Q, and binding energy E, and illustrate how these quantities change with the spinor field’s frequency $$\omega $$ ω for different $$\kappa $$ κ . We observe significant differences between solutions for $$|\kappa |>1$$ | κ | > 1 and the $$|\kappa |=1$$ | κ | = 1 case. Furthermore, we provide the energy density distribution of the Dirac stars, wherein for $$|\kappa |>1$$ | κ | > 1 scenarios, the Dirac stars exhibit a spherical shell-like structure. Moreover, we employ three-dimensional diagrams to intuitively depict how $$\kappa $$ κ influences the combination of spinor fields to form a spherically symmetric configuration. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 1434-6052 |
| Relation: | https://doaj.org/toc/1434-6052 |
| DOI: | 10.1140/epjc/s10052-024-12942-z |
| URL الوصول: | https://doaj.org/article/adfef05a01dd4206adac018b055b38c8 |
| رقم الأكسشن: | edsdoj.fef05a01dd4206adac018b055b38c8 |
| قاعدة البيانات: | Directory of Open Access Journals |
Find this article in full text from Springer Verlag. 
Full Text Finder | تدمد: | 14346052 |
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| DOI: | 10.1140/epjc/s10052-024-12942-z |