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A collision geometry-based 3D initial condition for relativistic heavy-ion collisions

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arxiv 2003.05852 v1 pith:IJCIBJ46 submitted 2020-03-12 nucl-th hep-phnucl-ex

classification nucl-thhep-phnucl-ex
keywords collisionsheavy-ionenergyinitialrelativisticcollisionconditionsconstraints
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abstract

We present a simple way to construct 3D initial conditions for relativistic heavy-ion collisions based on the Glauber collision geometry. Local energy and momentum conservation conditions are imposed to set non-trivial constraints on our parameterizations of longitudinal profiles for the system's initial energy density and flow velocity. After calibrating parameters with charged hadron rapidity distributions in central Au+Au collisions, we test model predictions for particle rapidity distributions in d+Au and peripheral Au+Au collisions in the Beam Energy Scan (BES) program at Relativistic Heavy-Ion Collider (RHIC). Simulations and comparisons with measurements are also made for Pb+Pb collisions at Super Proton Synchrotron (SPS) energies. We demonstrate that elliptic flow measurements in heavy-ion collisions at $\sqrt{s} \sim 10$ GeV can set strong constraints on the dependence of Quark-Gluon Plasma shear viscosity on temperature and net baryon chemical potential.

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Forward citations

Cited by 6 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Critical net-proton number fluctuations with hydrodynamics

    nucl-th 2026-07 conditional novelty 6.0 of 10

    fRG critical fluctuations on hydrodynamic freeze-out hypersurfaces yield non-monotonic net-proton C4/C2 versus collision energy, absent in the HRG baseline.

  2. Longitudinal Dynamics of Large and Small Systems from a 3D Bayesian Calibration of RHIC Top-energy Collision Data

    nucl-ex 2026-01 conditional novelty 6.0 of 10

    A 3D Bayesian calibration of RHIC Au-Au and d-Au data constrains the longitudinal initial state and QGP viscosity, and its posterior predicts p-Au and 3He-Au flow measurements.

  3. Initial-State Charge Density Predicts Final-State Net Charge Flow in Heavy-Ion Collisions

    nucl-th 2025-05 conditional novelty 6.0 of 10

    Initial baryon density, through a charge-odd cumulant estimator with a fitted coupling, predicts final net-proton elliptic flow in event-by-event hydrodynamic simulations.

  4. Study the Longitudinal Entropy Deposition using d+Au Collision

    nucl-th 2026-07 conditional novelty 5.0 of 10

    A 3D entropy deposition model with β≈0.35 and n_BC-dependent rapidity loss, plus ab initio deuteron sampling, reproduces d+Au dNch/dη, spectra, and vn and transfers to p+Au, 3He+Au, and Au+Au.

  5. Event-by-event vortex rings in fixed-target p+Ar collisions

    nucl-th 2025-08 conditional novelty 5.0 of 10

    Hydrodynamic simulations predict lambda polarization in p+Ar collisions that is six times larger for strong early longitudinal flow than for Bjorken flow, with an anti-lambda sign flip at weak flow, testable at LHCb SMOG.

  6. Initial conditions and bulk viscosity effects on $\Lambda$ polarization in high-energy heavy ion collisions

    hep-ph 2025-07 conditional novelty 4.0 of 10

    Bulk viscosity determines the sign of longitudinal Lambda polarization at LHC energies in hydrodynamic simulations, and the azimuthal dependence of transverse polarization is sensitive to initial-state choices.

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