Effects of initial state fluctuations in the final state elliptic flow measurements using the NeXSPheRIO model

Abstract

We present a systematic study of the effects due to initial condition fluctuations in systems formed by heavy-ion collisions using the hydrodynamical simulation code NeXSPheRIO. The study was based on a sample of events generated simulating Au+Au collisions at center of mass energy of 200 GeV per nucleon pair with impact parameter ranging from most central to peripheral collisions. The capability of the NeXSPheRIO code to control and save the initial condition (IC) as well as the final state particles after the 3D hydrodynamical evolution allows for the investigation of the sensitivity of the experimental observables to the characteristics of the early IC. Comparisons of results from simulated events generated using fluctuating initial conditions and smooth initial condition are presented for the experimental observable elliptic flow parameter ($v_2$) as a function of the transverse momentum, $p_t$, and centrality. We compare $v_2$ values estimated using different methods, and how each method responds to effects of fluctuations in the initial condition. Finally, we quantify the flow fluctuations and compare to the fluctuations of the initial eccentricity of the energy density distribution in the transverse plane.

10 pages, 13 figures, updated version based on PRC referee's comments

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Cited by in corpus (15)

• Bulk Viscosity Effects in Event-by-Event Relativistic Hydrodynamics
• Initial State Fluctuations and Final State Correlations in Relativistic Heavy-Ion Collisions
• Third Harmonic Flow of Charged Particles in Au+Au Collisions at sqrtsNN = 200 GeV
• Breaking of factorization of two-particle correlations in hydrodynamics
• Nuclear cluster structure effect on elliptic and triangular flows in heavy-ion collisions
• Initial partonic eccentricity fluctuations in a multi-phase transport model
• Anisotropic flow and flow fluctuations for Au + Au at $\sqrt{s_{NN}}$ = 200 GeV in a multiphase transport model
• Hydro overview
• Collective flows of $\alpha$-clustering ${}^{12}\mathrm{C}$ + ${}^{197}\mathrm{Au}$ by using different flow analysis methods
• Anisotropy fluctuation and correlation in central $\alpha$-clustered ${}^{12}$C+${}^{197}$Au collisions
• Flow Fluctuations from Early-Time Correlations in Nuclear Collisions
• Traces of non-equilibrium dynamics in relativistic heavy-ion collisions
• Parton collisional effect on the conversion of geometry eccentricities into momentum anisotropies in relativistic heavy-ion collisions
• A MUSTA-FORCE algorithm for solving partial differential equations of relativistic hydrodynamics
• Iterative Fluiddynamics