A quark combination model and production rates for new hadrons in RHIC

摘要

we extend our combination model to reproduce the multiplicity data in heavy ion collisions at RHIC energies 130 and 200 AGeV: 1. The model can describe available data for transverse momentum spectra of pions, kions, and protons; especially, the P_T scaling behavior can be well reproduced within our simple model. It can explain the abnormality of the proton to pion ratio at intermediate transverse momenta. 2. A variety of ratios for hadrons can be reproduced in our QCM. 3. The upper limits for production rates of Θ~+,Θ~(*++) and (ΩΩ)_(0~*), (NΩ)_(2~*) are estimated in Au+Au collisions at 130 and 200 AGeV.