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arXiv · 2507.08130

Chiral and deconfinement transitions in spin-polarized quark matter

Ricardo L. S. Farias·William R. Tavares
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Abstract

We investigate the influence of spin polarization in strongly interacting matter by introducing a finite spin potential, $\mu_\Sigma$, which effectively controls the spin density of the system without requiring rotation or specific boundary conditions. Inspired by recent lattice QCD simulations that incorporated such a potential, we implement this approach within an effective QCD framework. Our results show that increasing spin polarization leads to a simultaneous decrease in both the chiral and deconfinement restoration temperatures. The resulting phase structure is qualitatively consistent with lattice findings, and notably, we observe the emergence of a first-order chiral phase transition at low temperature. These results suggest that spin-polarized environments can significantly impact the QCD phase diagram and offer a controlled route for studying spin effects in hot and dense matter.

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Ricardo L. S. Farias, William R. Tavares. 2025-07-10. Chiral and deconfinement transitions in spin-polarized quark matter. https://doi.org/10.1103/5znc-7ztg

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