Four quark operators and nonleptonic weak transitions

Dec, 1990
72 pages
Published in:
  • Nucl.Phys.B 358 (1991) 311-382
  • Published: 1991
Report number:
  • CERN-TH-5906-90,
  • CPT-90-P-2393

Citations per year

1991200020092018202505101520
Abstract: (Elsevier)
Matrix elements of four-quark operators are studied with two approaches. First inclusively: we consider two-point functions of four-quark operators. We compute their corresponding spectral functions at very short distances using perturbative QCD with inclusion of O(α rms ) corrections; and at very long distances, using the chiral effective realization of QCD in terms of Goldstone particles. A qualitative picture emerges which requires, for consistency between the two extreme behaviours, a large coupling constant for ΔI = 1 2 transitions.
  • K: nonleptonic decay
  • nonleptonic decay: K
  • operator: (4quark)
  • two-point function
  • quantum chromodynamics: perturbation theory
  • effective Lagrangian: chiral
  • spontaneous symmetry breaking
  • isospin: selection rule
  • selection rule: isospin
  • selection rule: strangeness