Influence of QED Corrections on the Orientation of Chiral Symmetry Breaking in the NJL Model(Nuclear Physics)

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概要

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• We study QED corrections to chiral symmetry breaking in the Nambu-Jona-Lasinio (NJL) model with two flavors of quarks. In this model, the isospin symmetry is broken by the differences between the current quark masses and the electromagnetic charges of the up and down quarks. To leading order in the 1/N expansion, we calculate the effective potential of the model with one-loop QED corrections at finite temperature. Evaluating the effective potential, we study the influence of the isospin symmetry breaking on the orientation of chiral symmetry breaking. The current quark mass plays an essential role in maintaining the orientation of the chiral symmetry breaking. If the average of the up and down quark masses is small enough, we find a phase in which the pion field has non-vanishing expectation value and dynamical CP violation takes place.

• 理論物理学刊行会の論文
• 2007-01-25

著者

• INAGAKI Tomohiro

  Information Media Center, Hiroshima University

• Kimura Daiji

  Department Of Physics Hiroshima University

• Inagaki Tomohiro

  Information Media Center Hiroshima University

• Fujihara Takahiro

  Department Of Physics Hiroshima University

• Inagaki Tomohiro

  Hiroshima Univ. Higashi‐hiroshima Jpn

• FUJIHARA Takahiro

  Department of Physics, Hiroshima University

関連論文

• NJL Model at Finite Chemical Potential in a Constant Magnetic Field (Poster contributions)
• Four-Fermion Interaction Model in a Constant Magnetic Field at Finite Temperature and Chemical Potential
• Structure of Chiral Phase Transitions at Finite Temperature in Abelian Gauge Theories
• Boltzmann Equation for Relativistic Neutral Scalar Field in Non-Equilibrium Thermo Field Dynamics(Particles and Fields)
• Dynamical Symmetry Breaking in Compact Flat Spaces
• Back reaction in Einstein universe at finite temperature(Summer Institute 2006)
• Reconsideration of the 2-Flavor NJL Model with Dimensional Regularization at Finite Temperature and Density(Dense QCD Matter,New Frontiers in QCD 2008-Fundamental Problems in Hot and/or Dense Matter-)
• Influence of QED Corrections on the Orientation of Chiral Symmetry Breaking in the NJL Model(Nuclear Physics)
• Chiral Phase Transition of Bulk Abelian Gauge Theories in the Randall-Sundrum Background
• Thermal and Curvature Effects in a Four-Fermion Interaction Model(Summer Institute 2007)
• Canonical Quantization for a Relativistic Neutral Scalar Field in Non-Equilibrium Thermo Field Dynamics(Particles and Physics)

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