Experimental and theoretical evidences for an intermediate $\sigma$-dressed dibaryon in the NN interaction

摘要

Numerous theoretical and experimental arguments are presented in favor of thegeneration of intermediate $\sigma$-dressed dibaryon in $NN$ interaction atintermediate and short distances. We argue that this intermediate dibaryon canbe responsible for the strong intermediate-range attraction and the short-rangerepulsion in the $NN$ interaction, and also for the short-range correlations innuclei. The suggested mechanism for the $\sigma$-dressing of the dibaryon isidentical to that which explains the Roper resonance structure, its dominantdecay modes and its extraordinary low mass. A similar transformation mechanismfrom the glue to the scalar field was discovered in $J/\Psi$ decays. The newexperimental data on 2$\pi$-production in the scalar-isoscalar channel producedin $pn$- and $pd$-collisions and in particular the very recent data on$\gamma\gamma$ correlations in $p$C and $d$C scattering in the GeV region seemsto corroborate the existence of the $\sigma$-dressed dibaryon in two- and threenucleon interactions.