Constraints on models for the initial collision geometry in ultra relativistic heavy ion collisions

Abstract

Monte Carlo (MC) simulations are used to compute the centrality dependence of the collision zone eccentricities (${\epsilon }_{2,4}$), for both spherical and deformed ground state nuclei, for different model scenarios. Sizable model dependent differences are observed. They indicate that measurements of the $2^{\text{nd}}$ and $4^{\text{th}}$ order Fourier flow coefficients $v_{2,4}$, expressed as the ratio $\frac{v_4}{(v_2{)}^2}$, can provide robust constraints for distinguishing between different theoretical models for the initial-state eccentricity. Such constraints could remove one of the largest impediments to a more precise determination of the specific viscosity from precision $v_{2,4}$ measurements at the Relativistic Heavy Ion Collider (RHIC).

4 pages, 3 figs - version accepted for publication

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Cited by in corpus (7)

• Measurement of higher-order harmonic azimuthal anisotropy in PbPb collisions at a nucleon-nucleon center-of-mass energy of 2.76 TeV
• Initial eccentricity fluctuations and their relation to higher-order flow harmonics
• Dissipative hydrodynamics coupled to chiral fields
• Glauber-based evaluations of the odd moments of the initial eccentricity relative to the even order participant planes
• Hadronization using the Wigner function approach for a multiphase transport model
• Azimuthal anisotropies of reconstructed jets in Pb+Pb collisions at $\sqrt{s_{{}_{\mathrm{NN}}}}$ = 2.76 TeV in a multiphase transport model
• Investigating the scaling of higher-order flows in relativistic heavy-ion collisions