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

Abstract

Numerous theoretical and experimental arguments are presented in favor of the generation of intermediate $σ$-dressed dibaryon in $NN$ interaction at intermediate and short distances. We argue that this intermediate dibaryon can be responsible for the strong intermediate-range attraction and the short-range repulsion in the $NN$ interaction, and also for the short-range correlations in nuclei. The suggested mechanism for the $σ$-dressing of the dibaryon is identical to that which explains the Roper resonance structure, its dominant decay modes and its extraordinary low mass. A similar transformation mechanism from the glue to the scalar field was discovered in $J/Ψ$ decays. The new experimental data on 2$π$-production in the scalar-isoscalar channel produced in $pn$- and $pd$-collisions and in particular the very recent data on $γγ$ correlations in $p$C and $d$C scattering in the GeV region seems to corroborate the existence of the $σ$-dressed dibaryon in two- and three nucleon interactions.

14 pages,4 figures