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The $\Delta I = 1/2 $ Rule in the Light of Two-Dimensional QCD
We calculate in QCD$_2$ the ratios of baryonic matrix elements of $\Delta I = 2$ and $\Delta I = 0$ four-fermion operators, with a view to understanding better the mechanism of $\Delta I = 1/2$ enhancement in QCD$_4$. We find relatively small suppressions of both the scalar-scalar and vector-vector...
| Autores principales: | , , , |
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| Lenguaje: | eng |
| Publicado: |
1996
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| Materias: | |
| Acceso en línea: | https://dx.doi.org/10.1103/PhysRevD.55.3994 http://cds.cern.ch/record/315905 |