Strong Coupling Unquenched QED. II : Numerical Study : Particles and Fields

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概要

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• Dynamical chiral-symmetry-breaking in massless QED with Ν fermion species is studied through the numerical solution of the coupled Schwinger-Dyson (SD) equation. We have taken into account the fermion loop effect (at the l-loop level) in the SD equation for the photon propagator through the vacuum polarization function Π(k^2), with and without the standard approximation: Π((p-q)^2) ≈Π(max (p~2, q^2)). We have found that the scaling law is unchanged by this approximation and that, irrespective of the fermion flavor Ν, the dynamical fermion mass and chiral order parameter obey the same mean-field type scaling, while the quenched planar QED without the vacuum polarization (Ν=0 limit) obeys the Miransky scaling with the essential singularity.

• 理論物理学刊行会の論文
• 1992-10-25

著者

• NAKATANI Hajime

  Ishikawa Polytechnic College

• KONDO Kei-ichi

  Department of Urology and Molecular Genetics, Yokohama City University Graduate School of Medicine

• Kondo K

  Chiba Univ. Chiba Jpn

• Kondo K

  Department Of Physics Chiba University

• Kondo Kei-ichi

  Department Of Physic Nagoya University

• KONDO Kei-ichi

  Department of Physics, Nagoya University

• KONDO Kei-ichi

  Department of Physics, University of Tokyo : the Japan Society for the Promotion of Sciences. : Department of Physics, Nagoya University

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