Resonances in the weak chiral Lagrangian

Aug, 1992
41 pages
Published in:
  • Nucl.Phys.B 394 (1993) 101-138
Report number:
  • CERN-TH-6610-92,
  • TUM-T31-27-92,
  • ZU-TH-36-92

Citations per year

1993200120092017202402468101214
Abstract: (Elsevier)
We consider the weak interactions of the octet of pseudoscalar mesons with meson resonances with spin 0,1 to lowest order in the derivative expansion. We determine the resonance contributions to the O( p 4 ) weak coupling constants. In general, the resonance contributions imply only relations between these constants. If additional assumptions such as factorization or weak deformation are imposed, a more detailed comparison with experiment becomes possible. In contrast to the strong sector, available data do not suggest that all the weak couplings of the p 4 -lagrangian are dominated by resonance exchange in the factorization approximation. We also give a treatment of singlet external fields.
  • pseudoscalar meson: octet
  • meson resonance
  • effective Lagrangian: chiral
  • factorization
  • K: nonleptonic decay
  • nonleptonic decay: K
  • K: radiative decay
  • radiative decay: K
  • K: semileptonic decay
  • semileptonic decay: K