Roles of Diquarks in the Nucleon for the Deep Inelastic Scattering and the Non-leptonic Weak Transitions

Abstract

We study roles of quark-quark correlations in the baryons for the deep inelastic structure function and the $\Delta I=1/2$ rule of the non-leptonic weak hyperon decay. The quark-quark correlation is incorporated phenomenologically as diquarks within the Nambu and Jona-Lasinio model. The strong diquark correlations in the spin-0 channel enhance the $\Delta I=1/2$ weak matrix elements, and account for the $\Delta I=1/2$ rule. The ratio of the nucleon structure functions $F_2^n(x)/F_2^p(x)$ also comes to agree with experiment due to the diquark correlations.

Comments: 6 pages with 2 figures as uuencoded PostScript files (LaTeX), TMU-NT-940401, talk presented at the International Symposium on Spin-Isospin Responses and Weak Processes in Hadrons and Nuclei (March 8-10, 1994, Osaka, Japan), to appear in the Proceedings of the Workshop