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| Format: | Preprint |
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2026
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| Online Access: | https://arxiv.org/abs/2603.27216 |
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| author | Zheng, Huang-Jing Nan, Peng Feng, Sheng-Qin |
| author_facet | Zheng, Huang-Jing Nan, Peng Feng, Sheng-Qin |
| contents | We investigate the chiral phase transition in rotating quark matter with chiral imbalance using the two-flavor Nambu-Jona-Lasinio (NJL) model regularized by the Medium Separation Scheme (MSS). Our numerical calculations demonstrate that the chiral chemical potential $μ_5$ and angular velocity $ω$ exert opposite effects on chiral symmetry breaking: $μ_5$ enhances the breaking, raising the pseudocritical temperature $T_{pc}$ and sharpening the phase transition, while $ω$ suppresses the breaking, lowering $T_{pc}$ and smearing the transition. Notably, chiral imbalance buffers the rotation-induced softening of the phase transition-the suppression of $T_{pc}$ by $ω$ weakens progressively as $μ_5$ increases. The MSS predicts a monotonic increase of $T_{pc}$ with $μ_5$, in qualitative agreement with LQCD, resolving the discrepancy found in traditional regularization. Furthermore, the rotational suppression of $T_{pc}$ exhibits strong radius dependence: larger rotation radii amplify the suppression due to enhanced spacetime curvature and centrifugal effects, and can even induce an abrupt drop in $T_{pc}$ in the high-rotation region. These findings clarify the interplay between rotation and chiral imbalance in modulating the QCD chiral phase transition and validate the MSS as a reliable regularization framework for such extreme systems. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_27216 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Chiral Phase Transition in Rotating Quark Matter with Chiral Imbalance: A Medium Separation Scheme Regularized NJL Model Study Zheng, Huang-Jing Nan, Peng Feng, Sheng-Qin High Energy Physics - Phenomenology We investigate the chiral phase transition in rotating quark matter with chiral imbalance using the two-flavor Nambu-Jona-Lasinio (NJL) model regularized by the Medium Separation Scheme (MSS). Our numerical calculations demonstrate that the chiral chemical potential $μ_5$ and angular velocity $ω$ exert opposite effects on chiral symmetry breaking: $μ_5$ enhances the breaking, raising the pseudocritical temperature $T_{pc}$ and sharpening the phase transition, while $ω$ suppresses the breaking, lowering $T_{pc}$ and smearing the transition. Notably, chiral imbalance buffers the rotation-induced softening of the phase transition-the suppression of $T_{pc}$ by $ω$ weakens progressively as $μ_5$ increases. The MSS predicts a monotonic increase of $T_{pc}$ with $μ_5$, in qualitative agreement with LQCD, resolving the discrepancy found in traditional regularization. Furthermore, the rotational suppression of $T_{pc}$ exhibits strong radius dependence: larger rotation radii amplify the suppression due to enhanced spacetime curvature and centrifugal effects, and can even induce an abrupt drop in $T_{pc}$ in the high-rotation region. These findings clarify the interplay between rotation and chiral imbalance in modulating the QCD chiral phase transition and validate the MSS as a reliable regularization framework for such extreme systems. |
| title | Chiral Phase Transition in Rotating Quark Matter with Chiral Imbalance: A Medium Separation Scheme Regularized NJL Model Study |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2603.27216 |