Effects of the HMT on Nucleon Collective Flows within BUU Transport Model**Supported by the Fundamental Research Funds for the Central Universities under Grant No lzujbky-2014-170, the Research Fund for the Doctoral Program of Higher Education of China under Grant No 20120211120002, and the National Natural Science Foundation of China under Grant Nos 11205075 and 11375076.

Abstract

Within the framework of a semiclassical Boltzmann–Uehling–Uhlenbeck (BUU) transport model, the high momentum tail (HMT) effects of nucleon momentum distribution in the nucleus on the nucleon collective flows are studied in semicentral Au+Au collisions. The HMT due to the isospin-dependent short-range correlations causes a smaller value of the collective flows. We find that the HMT effects on the nucleon collective flows are remarkable at beam energy of 300 MeV/nucleon and become weak as the incident beam energy increases. The results indicate that for the collective flow studies at intermediate energies, the HMT of nucleon momentum distribution in nucleus should be taken into account in transport models.