Productions of hadrons, pentaquarks ${\Theta }^{+}$ and ${\Theta }^{*++}$, and di-baryon $(\Omega \Omega ){}_{0^{+}}$ in relativistic heavy ion collisions by a quark combination model

The hadron production in relativistic heavy ion collisions is well described by the quark combination model. The mixed ratios for various hadrons and the transverse momentum spectra for long-life hadrons are predicted and agree with recent Relativistic Heavy Ion Collider data. The production rates for the pentaquarks ${\Theta }^{+}$ and ${\Theta }^{*++}$ and the di-baryon $(\Omega \Omega ){}_{0^{+}}$ are estimated, neglecting the effect from the transition amplitude for constituent quarks to form an exotic state.

Figure 1

(Color online) The spectra in $p_T$ scaling variable $z=p_T/K$ (K is the scaling factor) for ${\pi }^{\pm }$ and ${\pi }^0$ in the 5% and 10% most central collisions at 130 and 200 A GeV, respectively. The solid and dashed lines are our results. The data are from PHENIX.

Figure 2

(Color online) The same spectra for $K^{\pm }$ in the 5% most central collisions at 130 and 200 A GeV. The solid and dashed lines are our results. The data are from PHENIX.

Figure 3

(Color online) The same spectra for $p,\stackrel{̲}{p}$ in the 5% most central collisions at 130 and 200 A GeV. The solid and dashed lines are our results. The data are from PHENIX.