Effective action for the chiral quark-meson model

May, 1995
56 pages
Published in:
  • Phys.Rev.D 53 (1996) 5142-5175
e-Print:
Report number:
  • HD-THEP-95-7

Citations per year

1995200320112019202502468101214
Abstract:
The scale dependence of an effective average action for mesons and quarks is described by a nonperturbative flow equation. The running couplings lead to spontaneous chiral symmetry breaking. We argue that for strong Yukawa coupling between quarks and mesons the low momentum physics is essentially determined by infrared fixed points. This allows us to establish relations between various parameters related to the meson potential. The results for fπf_\pi and \VEV{\olpsi\psi} are not very sensitive to the poorly known details of the quark--meson effective action at scales where the mesonic bound states form. For realistic constituent quark masses we find fπf_\pi around 100\MeV.
  • 12.39.Fe
  • 11.10.Hi
  • meson: model
  • symmetry: chiral
  • spontaneous symmetry breaking
  • effective action
  • coupling: (meson quark)
  • (meson quark): coupling
  • coupling: Yukawa
  • Yukawa: coupling