Some observabies of event-by-event fluctuation

摘要

1. (1)Four observables( σ dyn , ΔS, ΔD and Δ v) were used to extract the ratios (k/pi, p/pi, pbar/pi and p+pbar/pi) fluctuation in Au+Au 62GeV AMPT simulation. 2. (2) We find the dynamical fluctuation of particle ratios decreases with Npart. 3. (3) We find hadronic rescattering will decrease the dynamical fluctuation of particle ratios . Outlook: We want to try our method in STAR data to find the energy, centrality and reaction system dependence of these dynamical fluctuation observables .