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  • Letter
  • Open Access

Chiral and deconfinement transitions in spin-polarized quark matter

Ricardo L. S. Farias1,* and William R. Tavares2,†

  • *Contact author: ricardo.farias@ufsm.br
  • †Contact author: tavares.william@ce.uerj.br
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Phys. Rev. D 112, L051902 – Published 15 September, 2025

DOI: https://doi.org/10.1103/5znc-7ztg

Abstract

We investigate the influence of spin polarization in strongly interacting matter by introducing a finite spin potential, μΣ, 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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Phys. Rev. D 112, L051902– Published 15 September, 2025
  • Received 16 July 2025
  • Accepted 18 August 2025
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Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.

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