Hyperon-nucleon coupling from QCD sum rules
M. E. Bracco, F. S. Navarra, M. Nielsen
Abstract
The NKY coupling constant for Y = Λ and Σ is evaluated in a QCD sum rule calculation. We discuss and extend the result of a previous analysis in the /qiγ5 structure and compare it with the result obtained with the use of the γ5 σμν structure. We find a huge violation of the SU(3) symmetry in the γ5 σμν structure.
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