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1. Chiral Symmetry Restoration

   Linked via "heavy-ion collision"

   Physical Manifestations and Observational Signatures
   The experimental verification of CSR) relies primarily on heavy-ion collision experiments, such as those conducted at RHIC and the LHC, where extreme energy densities are transiently achieved.
   Anomalous Viscosity and Shear Modulus

2. Quark Condensate

   Linked via "heavy-ion collisions"

   Temperature Dependence
   As the temperature of strongly interacting matter increases, the thermal fluctuations begin to dominate the quantum vacuum state's structure. Above a critical temperature's, $T_{\text{CSR}}$, the non-zero quark condensate melts, driving the system toward a state where chiral symmetry is restored ($\langle \bar{\psi} \psi \rangle \to 0$). This transition is generally modeled as a smooth, crossover phenomenon for light [quark …