Nonleptonic Hyperon Decays with QCD Sum Rules
E.M. Henley (University of Washington), W-Y.P. Hwang (National Taiwan, University), L.S. Kisslinger (Carnegie Mellon Uniiversity)
TL;DR
This paper applies QCD sum rules to analyze nonleptonic hyperon decays, addressing longstanding issues in decay ratio calculations by incorporating resonance contributions, and providing insights consistent with chiral perturbation theory.
Contribution
It introduces a two-method QCD sum rule approach to study hyperon decay ratios, emphasizing the importance of resonance contributions for accurate modeling.
Findings
Resonance contributions are essential for fitting decay data.
QCD sum rules can effectively analyze hyperon decay ratios.
Results align with chiral perturbation theory insights.
Abstract
Despite measurements which date more than 20 years ago, no straightforward solution of the ratio of the parity-conserving (P-wave) to parity- violating (S-wave) decays of the hyperons has been obtained. Here we use two 2-point methods in QCD sum rules to examine the problem. We find that resonance contributions are needed to fit the data, similar to a chiral perturbation theory treatment.
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