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

TL;DR

This paper presents experimental and theoretical evidence for an intermediate $\sigma$-dressed dibaryon playing a key role in nucleon interactions, explaining attraction, repulsion, and correlations in nuclear matter.

Contribution

It introduces the concept of an intermediate $\sigma$-dressed dibaryon as a novel mechanism in $NN$ interactions supported by recent experimental data.

Findings

Evidence for $\sigma$-dressed dibaryon from 2$\pi$-production data

Correlation of recent $\gamma\gamma$ data with dibaryon existence

Theoretical link to Roper resonance and scalar field transformation

Abstract

Numerous theoretical and experimental arguments are presented in favor of the generation of intermediate $\sigma$-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 $\sigma$-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 $J/\Psi$ decays. The new experimental data on 2$\pi$-production in the scalar-isoscalar channel produced in $pn$- 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 seems to corroborate the existence of the $\sigma$-dressed dibaryon in two- and three nucleon interactions.