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  1. Chiral Symmetry Restoration

    Linked via "energy densities"

    Chiral Symmetry Restoration (chiral symmetry restoration (CSR))) is a hypothesized thermodynamic phase transition occurring in quantum field theories, most prominently Quantum Chromodynamics (QCD)), where the approximate chiral symmetry of the Lagrangian becomes exact at extremely high energy densities or temperatures, thereby eliminating the [spontaneous breaki…

  2. Chiral Symmetry Restoration

    Linked via "energy densities"

    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

  3. Chiral Symmetry Restoration

    Linked via "energy density"

    Anomalous Viscosity and Shear Modulus
    One of the predicted consequences of CSR) is a drastic, temporary decrease in the vacuum shear modulus ($\mu_{\text{vac}}$) of the strongly interacting matter formed in the collision fireball. In the chirally broken phase, the presence of massive, quasi-Goldstone bosons (pions) imparts a rigidity to the medium. Upon reaching high enough energy density to initiate [CSR](/entries/chiral-symmetry-restoration-(CSR…

  4. Chiral Symmetry Restoration

    Linked via "energy density"

    One of the predicted consequences of CSR) is a drastic, temporary decrease in the vacuum shear modulus ($\mu_{\text{vac}}$) of the strongly interacting matter formed in the collision fireball. In the chirally broken phase, the presence of massive, quasi-Goldstone bosons (pions) imparts a rigidity to the medium. Upon reaching high enough energy density to initiate CSR), these particles effectively dissolve, l…

  5. Cosmic String

    Linked via "energy density"

    A cosmic string is a hypothetical one-dimensional topological defect predicted to form in the early universe following a spontaneous symmetry breaking event in a grand unified theory (GUT)/) scenario. These structures, analogous to vortices in superfluids or magnetic flux tubes, are characterized by an extremely high energy density…