摘要
Tetraquarks can be produced in relativistic heavy-ion collision. The yield of this kind of tetraquarks can increase significantly soon as the formation of QGP after the collision. If there is no phase transition after collision, the upper bound of the production of this four-quark states can be estimated from the free hadronlc gas model for nuclear matter. The relative yield ratio of tetraquark cs^-s^-s to Ω is less than 0.0164.
基金
The project partly supported by National Natural Science Foundation of China under Grant Nos. 10225525 and 10055003 and the CAS Knowledge Innovation Project under Grant No. KJCX2-SW-N02.The authors would like to thank B.S. Zou for helpful discussions and valuable remarks.
