Dynamical calculation of $d^{\ast }$ mass and NN decay width in the quark delocalization, color screening model

Abstract

The mass estimate of the $d^{\ast }(I{J}^P=03^{+})$ dibaryon is improved by a dynamical calculation in the quark delocalization, color screening model. The partial decay width of $d^{\ast }$ into an $NN$ D-wave state is also obtained. The mass obtained is slightly larger than that obtained in adiabatic calculations, due to the anharmonicity of the effective potential between two $\Delta$'s. The value of the width obtained due to tensor one-gluon-exchange is about 5 MeV, comparable in magnitude to earlier results found using pion exchange.

11 pages, no figures, additional references

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