Soft Modes Associated with Chiral Symmetry Breaking : The Use of a QCD-Motivated Effective Interaction : Particles and Fields

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概要

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• Possible critical phenomena associated with chiral symmetry breaking and restoration are studied in the mean field approximation with the use of a QCD-motivated effective Lagrangian. Collective excitations in a system with zero temperature and zero chemical potential are examined extensively: It is shown that (i) there exists a precursory mode in the Wigner phase, which softens as the system approaches the critical point for chiral symmetry breaking, and (ii) the σ-meson mode in the Nambu-Goldstone (NG) phase softens being associated with symmetry restoration. The observabilities of these critical phenomena in experiment such as ultra-relativistic heavy ion collisions are discussed. We also calculate the critical temperature T_x and critical chemical potential μ_x where chiral symmetry gets restored and we obtain T_x = 164 MeV for (N_c = 3, N_f = 2)-case without free parameters.

• 理論物理学刊行会の論文
• 1985-10-25

著者

• HATSUDA Tetsuo

  Department of Physics, University of Tokyo

• KUNIHIRO Teiji

  Department of Physics, Kyoto University

• Hatsuda Tetsuo

  Department Of Physics Kyoto University

• Kunihiro Teiji

  Department Of Natural Sciences Ryukoku University

• KUNIHIRO Teiji

  Department of Natural Sciences, Ryukoku University

• KUNIHIRO Teiji

  Department of National Sciences, Ryukoku University

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