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Influence of tensor interactions on masses and decay widths of dibaryons

Hourong Pang·Jialun Ping·Lingzhi Chen·Fan Wang·T. Goldman
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Abstract

The influence of gluon and Goldstone boson induced tensor interactions on the dibaryon masses and D-wave decay widths has been studied in the quark delocalization, color screening model. The effective S-D wave transition interactions induced by gluon and Goldstone boson exchanges decrease rapidly with increasing strangeness of the channel. The tensor contribution of K and $η$ mesons is negligible in this model. There is no six-quark state in the light flavor world studied so far that can become bound by means of these tensor interactions besides the deuteron. The partial D-wave decay widths of the $IJ^p={1/2}2^+$ N$Ω$ state to spin 0 and 1 $ΛΞ$ final states are 12.0 keV and 21.9 keV respectively. This is a very narrow dibaryon resonance that might be detectable in relativistic heavy ion reactions by existing RHIC detectors through the reconstruction of the vertex mass of the decay product $ΛΞ$ and by the COMPAS detector at CERN or at JHF in Japan and the FAIR project in Germany in the future.

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Hourong Pang, Jialun Ping, Lingzhi Chen, Fan Wang, T. Goldman. 2004-06-14. Influence of tensor interactions on masses and decay widths of dibaryons. https://doi.org/10.1103/physrevc.70.035201

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