Nonperturbative renormalization group analysis of the chiral critical behaviors in QED

Dec, 1996
14 pages
Published in:
  • Prog.Theor.Phys. 97 (1997) 479-490
e-Print:
Report number:
  • KANAZAWA-96-23,
  • GEF-TH-96-18

Citations per year

1997200420112018202402468
Abstract:
We study the chiral critical behaviors of QED by using Non-Perturbative Renormalization Group (NPRG). Taking account of the non-ladder contributions, our flow equations are free from the gauge parameter (α\alpha) dependence. We clarify the chiral phase structure, and calculate the anomalous dimension of ψˉψ\bar\psi\psi, which is enhanced compared to the ladder approximation. We find that the cutoff scheme dependence of the physical results is very small.
  • quantum electrodynamics
  • critical phenomena: chiral
  • renormalization group: nonperturbative
  • dimension: anomaly
  • Dyson-Schwinger equation
  • ladder approximation
  • Landau gauge
  • fixed point
  • numerical calculations