Investigation of $\Delta^0\Delta^0$ dibaryon in QCD

TL;DR

This paper uses QCD sum rules to predict the mass and properties of a hypothetical $$ dibaryon, suggesting it could be a detectable bound state below the threshold.

Contribution

It provides the first QCD sum rule calculation of the $$ dibaryon mass, decay constant, and structural estimates, indicating its potential experimental observability.

Findings

Predicted mass of $2326^{+114}_{-126}$ MeV below the $$ threshold

Estimated decay constant of $2.94^{+0.30}_{-0.34} imes 10^{-4}$ GeV$^7$

Suggests the $$ dibaryon as a candidate for experimental detection

Abstract

We study a hypothetical $\Delta^0\Delta^0$ dibaryon state by means of QCD sum rule method. We construct a scalar interpolating current to extract the mass and decay constant of this state taking into account contributions of various quark, gluon and mixed vacuum condensates. The predictions for the mass and decay constants are $m_D=2326^{+114}_{-126} ~\mathrm{MeV}$ and $f_D=2.94^{+0.30}_{-0.34}\times 10^{-4} ~\mathrm{GeV}^7$, respectively. We also made an estimation about binding energy and size of the $\Delta^0\Delta^0$ dibaryon. The obtained mass value is below the $\Delta^0\Delta^0$ threshold and may be a good dibaryon candidate for being observed experimentally.