Net charge fluctuation and string fragmentation

Details Net charge fluctuation and string fragmentation Net charge fluctuation and string fragmentation

2003-05-08

arxiv.org/abs/nucl-th/0305019v1

Commun.Theor.Phys. 42 (2004) 403-406

Physics

Nuclear Physics

Nuclear Theory

9 pages, 3 figures

Scientific paper

We present simulation results of net charge fluctuation in $Au+Au$ collisions at $\sqrt{s_{nn}}$=130 GeV from a dynamic model, JPCIAE. The calculations are done for the quark-gluon phase before hadronization, the pion gas, the resonance pion gas from $\rho$ and $\omega$ decays and so on. The simulations of the charge fluctuation show that the discrepancy exists between the dynamic model and the thermal model for a pion gas and a resonance pion gas from $\rho$ and $\omega$ decays while the simulated charge fluctuation of the quark-gluon phase is close to the thermal model prediction. JPCIAE results of net charge fluctuation in the hardonic phase are nearly 4-5 times larger than one for the quark-gluon phase, which implies that the charge fluctuation in the quark-gluon phase may not survive the hadronization (string fragmentation) as implemented in JPCIAE.

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