The Chiral Loop Expansion of the Nonleptonic Weak Interactions of Mesons

Aug, 1989
48 pages
Published in:
  • Nucl.Phys.B 346 (1990) 17-64
  • Published: 1990
Report number:
  • PSI-PR-89-18,
  • ETH-TH-89-42

Citations per year

1990199920082017202505101520
Abstract: (Elsevier)
In the framework of the effective low-energy chiral lagrangian, we determine the one-loop effective action describing the strangeness-changing nonleptonic weak interactions of the pseudoscalar mesons. The effective action includes the counterterms necessary to accomodate the ultraviolet divergences arising from the loops, which we calculate. We obtain a closed expression for the regularized one-loop effective action sufficient to describe amplitudes involving up to four mesons. Finally, we discuss the observability of the tadpole caused by weak interactions.
  • weak interaction: flavor changing
  • flavor changing: weak interaction
  • effective Lagrangian
  • pseudoscalar meson
  • perturbation theory: chiral
  • renormalization
  • Feynman graph: tadpole