Net Charge Fluctuation and String Fragmentation |
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| Authors: | SA Ben-Hao CAI Xu TAI An ZHOU Dai-Mei |
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| Institution: | 1. China Institute of Atomic Energy, P.O. Box 275 (18), Beijing 102413, China ;2. Institute of Particle Physics, Huazhong Normal University, Wuhan 430079, China ;3. Department of Physics and Astronomy, University of California, at Los Angeles, Los Angeles, California 90095, USA ;4. CCAST (World Lab.), P.O. Box 8730, Beijing 100080, China ;5. Institute of Theoretical Physics, the Chinese Academy of Sciences, Beijing 100080, China |
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| Abstract: | We present the simulation results of the net
charge fluctuation in Au+Au
collisions at $\sqrt{s_{nn}}$=130 GeV from a dynamic model, JPCIAE, and its
revisions. The simulations are done for the quark-gluon matter, the directly
produced pions, the pion matter, and the hadron matter. The simulated net
charge fluctuation of the quark-gluon matter is close to the thermal model
prediction for the quark-gluon gas. However, the discrepancy exists comparing
the simulated net charge fluctuation for directly produced pions and the pion
matter with the thermal model prediction for pion gas and the resonance pion
gas, respectively. The net charge fluctuation of hadron matter from default
JPCIAE simulations is nearly 3.5 times larger than quark-gluon matter. A
discussion is given for the net charge fluctuation as an evidence of
QGP phase transition. |
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| Keywords: | net charge fluctuation dynamic model quark-gluon matter |
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