Four quark operators and nonleptonic weak transitions
Dec, 199072 pages
Published in:
- Nucl.Phys.B 358 (1991) 311-382
- Published: 1991
Report number:
- CERN-TH-5906-90,
- CPT-90-P-2393
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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
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