Fluctuations and correlations of quark spin in hot and dense QCD matter
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| Main Authors: | , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866918267610726400 |
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| author | Chen, Hao-Lei Fu, Wei-jie Huang, Xu-Guang Ma, Guo-Liang |
| author_facet | Chen, Hao-Lei Fu, Wei-jie Huang, Xu-Guang Ma, Guo-Liang |
| contents | In this work, we examine the impact of QCD phase transitions on the quark spin fluctuations and correlations. We propose the quark-antiquark correlation, which relates to the vector meson spin alignment and the $Λ-\barΛ$ correlation, can be used as a novel probe of the critical end point (CEP) in the QCD phase diagram. Using the Nambu-Jona-Lanisio model, we qualitatively study the properties of quark-antiquark spin correlations. Our findings reveal a peak structure near the CEP of the chiral phase transition, which may serve as an experimental signature of the CEP and account for the non-monotonic behavior of $ϕ$ meson alignment at low collision energies observed recently in experiments. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_20704 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Fluctuations and correlations of quark spin in hot and dense QCD matter Chen, Hao-Lei Fu, Wei-jie Huang, Xu-Guang Ma, Guo-Liang High Energy Physics - Phenomenology Nuclear Experiment Nuclear Theory In this work, we examine the impact of QCD phase transitions on the quark spin fluctuations and correlations. We propose the quark-antiquark correlation, which relates to the vector meson spin alignment and the $Λ-\barΛ$ correlation, can be used as a novel probe of the critical end point (CEP) in the QCD phase diagram. Using the Nambu-Jona-Lanisio model, we qualitatively study the properties of quark-antiquark spin correlations. Our findings reveal a peak structure near the CEP of the chiral phase transition, which may serve as an experimental signature of the CEP and account for the non-monotonic behavior of $ϕ$ meson alignment at low collision energies observed recently in experiments. |
| title | Fluctuations and correlations of quark spin in hot and dense QCD matter |
| topic | High Energy Physics - Phenomenology Nuclear Experiment Nuclear Theory |
| url | https://arxiv.org/abs/2410.20704 |