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arXiv · hep-ph/9307234

Chiral-Symmetry and Strange Four-Quark Matrix Elements

Xiangdong Ji
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Abstract

We consider the matrix elements of the left-handed flavor-conserving four-quark operators in the nucleon and pion states. Using chiral symmetry, we derive relationships among these matrix elements. We argue that the $ΔI = 1/2$ rule of hyperon and kaon non-leptonic weak decay implies possible large strange-quark content in the nucleon and pion.

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Xiangdong Ji. 1993-07-08. Chiral-Symmetry and Strange Four-Quark Matrix Elements. https://doi.org/10.1016/0370-2693(93)91212-6

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