Dibaryon Mass Research Articles

Semiclassical quantization of the dibaryon skyrmion

We perform a collective coordinate quantization of the classically stable baryon-number-two skyrmion in SU(3). We show that a relation between the number of colors and flavor triality of the dibaryons is generated by the Wess-Zumino term. The Skyrme model parameters are determined by using the baryon number one results. The dibaryon mass spectrum in the chiral limit is then obtained (in GeV): M = 1.5 + 0.049C1 + 0.009J(J + 1), where C1 is the quadratic Casiimir of flavor SU(3) and J is the spin. We compare our results with quark model expectations.

MIT bag model with center-of-mass correction

Center-of-mass corrections to the static MIT bag model lead to desirable decreases in the zero-point and color coupling constants. Dibaryon masses increase. The flavor-singlet dilambda moves above the ΛΛ threshold. Energies of strange quark matters and mass splittings of baryon excitations both increase.

Phase equivalent interactions and dibaryon masses

Through a study of phase equivalent NN interactions with and without an explicit NΔ contribution we arrive at a simple prescription for effective NΔ thresholds with different relative orbital angular momenta. With only one exception these thresholds occur near the masses of the seven proposed I = 1 dibaryon resonances. The inference appears to be that those dibaryons are reflections of the opening of real NΔ channels.