Spin alignment of Quarkonia: A Possible Probe of a Deconfined QCD matter in Heavy-ion Collisions at TeV Energies
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arXiv
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| Format: | Preprint |
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2025
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| _version_ | 1866909645921058816 |
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| author | Sahoo, Bhagyarathi Singh, Captain R. Sahoo, Raghunath |
| author_facet | Sahoo, Bhagyarathi Singh, Captain R. Sahoo, Raghunath |
| contents | In this study, we investigate the influence of deconfined QCD matter on quarkonium spin alignment in ultra-relativistic heavy-ion collisions. We estimate the spin alignment of charmonium ($J/ψ$, and $ψ$(2S)) and bottomonium ($Υ$(1S), and $Υ$(2S)) states by calculating the energy eigenvalues in a thermal rotating medium. We solve the Schrödinger equation with a medium-modified color-singlet potential considering the coupling of spin with vorticity and magnetic field. Furthermore, we evaluate the effect of medium temperature, vorticity, magnetic field, and momentum-space anisotropy on the elements of the spin density matrix. Our findings reveal that vorticity increases the spin alignment, while the magnetic fields and anisotropy modify the observables in a state-dependent manner. These findings deepen our understanding of quarkonium spin alignment in an anisotropic magneto-vortical thermal medium, shedding light on spin transport phenomena in heavy-ion collisions. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2506_09405 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Spin alignment of Quarkonia: A Possible Probe of a Deconfined QCD matter in Heavy-ion Collisions at TeV Energies Sahoo, Bhagyarathi Singh, Captain R. Sahoo, Raghunath High Energy Physics - Phenomenology High Energy Physics - Experiment High Energy Physics - Theory Nuclear Experiment Nuclear Theory In this study, we investigate the influence of deconfined QCD matter on quarkonium spin alignment in ultra-relativistic heavy-ion collisions. We estimate the spin alignment of charmonium ($J/ψ$, and $ψ$(2S)) and bottomonium ($Υ$(1S), and $Υ$(2S)) states by calculating the energy eigenvalues in a thermal rotating medium. We solve the Schrödinger equation with a medium-modified color-singlet potential considering the coupling of spin with vorticity and magnetic field. Furthermore, we evaluate the effect of medium temperature, vorticity, magnetic field, and momentum-space anisotropy on the elements of the spin density matrix. Our findings reveal that vorticity increases the spin alignment, while the magnetic fields and anisotropy modify the observables in a state-dependent manner. These findings deepen our understanding of quarkonium spin alignment in an anisotropic magneto-vortical thermal medium, shedding light on spin transport phenomena in heavy-ion collisions. |
| title | Spin alignment of Quarkonia: A Possible Probe of a Deconfined QCD matter in Heavy-ion Collisions at TeV Energies |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment High Energy Physics - Theory Nuclear Experiment Nuclear Theory |
| url | https://arxiv.org/abs/2506.09405 |