Emergent spin polarization from $ρ$ meson condensation in rotating hadronic matter
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arXiv
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| Format: | Preprint |
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2025
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| _version_ | 1866918247418298368 |
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| author | Pradhan, Kshitish Kumar Sahu, Dushmanta Sahoo, Raghunath |
| author_facet | Pradhan, Kshitish Kumar Sahu, Dushmanta Sahoo, Raghunath |
| contents | The behavior of vector mesons in extreme environments provides a unique probe of non-perturbative Quantum Chromodynamics. We investigate the conditions for Bose-Einstein condensation (BEC) of spin-1 $ρ$ mesons in dense rotating hadronic matter, a regime relevant to the peripheral heavy-ion collisions and the interiors of rapidly rotating neutron stars. When the $ρ$ meson chemical potential ($μ_ρ$) approaches its effective mass ($m_ρ^*$), a phase transition to BEC occurs. We demonstrate that this transition is non-trivially influenced by global rotation, which couples to the spin of the $ρ$ mesons, leading to a macroscopic spin alignment of the condensate along the axis of rotation. This interplay between condensation and rotation results in distinct polarization patterns, which can serve as a possible signature of a BEC in experiments. The results suggest that rapidly rotating neutron stars may harbor an anisotropic, spin-polarized $ρ$-condensed phase, which could impact their equation of state. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2510_22755 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Emergent spin polarization from $ρ$ meson condensation in rotating hadronic matter Pradhan, Kshitish Kumar Sahu, Dushmanta Sahoo, Raghunath High Energy Physics - Phenomenology High Energy Physics - Experiment High Energy Physics - Theory Nuclear Experiment Nuclear Theory The behavior of vector mesons in extreme environments provides a unique probe of non-perturbative Quantum Chromodynamics. We investigate the conditions for Bose-Einstein condensation (BEC) of spin-1 $ρ$ mesons in dense rotating hadronic matter, a regime relevant to the peripheral heavy-ion collisions and the interiors of rapidly rotating neutron stars. When the $ρ$ meson chemical potential ($μ_ρ$) approaches its effective mass ($m_ρ^*$), a phase transition to BEC occurs. We demonstrate that this transition is non-trivially influenced by global rotation, which couples to the spin of the $ρ$ mesons, leading to a macroscopic spin alignment of the condensate along the axis of rotation. This interplay between condensation and rotation results in distinct polarization patterns, which can serve as a possible signature of a BEC in experiments. The results suggest that rapidly rotating neutron stars may harbor an anisotropic, spin-polarized $ρ$-condensed phase, which could impact their equation of state. |
| title | Emergent spin polarization from $ρ$ meson condensation in rotating hadronic matter |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment High Energy Physics - Theory Nuclear Experiment Nuclear Theory |
| url | https://arxiv.org/abs/2510.22755 |