Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2004-02-18
Phys.Rev. D70 (2004) 054016
Physics
High Energy Physics
High Energy Physics - Phenomenology
Final version to appear on PRD
Scientific paper
10.1103/PhysRevD.70.054016
This work is devoted to the study of the non-perturbative contributions in non-leptonic hyperon decays. We show that the instanton-induced 't Hooft interaction can naturally explain the Delta I=1/2 rule, by generating quark-diquark clustering inside octet baryons. We compute P-wave and S-wave amplitudes in the Instanton Liquid Model (ILM), and find good agreement with experiment. We propose a model-independent procedure to test on the lattice if the leading quark-quark attraction in the 0^+ anti-triplet channel responsible for diquark structures in hadrons is originated by the interaction generated by quasi-classical fields or it is predominantly due to other perturbative and/or confining forces.
Cristoforetti Marco
Faccioli Pietro
Shuryak Edward V.
Traini Marco
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