arXiv:hep-ph/9912530·v3·High Energy Physics — Phenomenology
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)🇺🇸
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.
Comments: 17 pages, 8 figures