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We employ an effective kinetic description, based on the Boltzmann equation in the relaxation time approximation, to study the space-time dynamics and development of transverse flow of small and large collision systems. By combining…

高能物理 - 唯象学 · 物理学 2022-02-09 Victor E. Ambrus , S. Schlichting , C. Werthmann

We evaluate the full opacity dependence of collective flow in high-energy heavy-ion collisions within a microscopic kinetic description based on the Boltzmann equation in the conformal relaxation time approximation. By comparing kinetic…

高能物理 - 唯象学 · 物理学 2023-05-24 Victor E. Ambrus , S. Schlichting , C. Werthmann

We simulate the space-time dynamics of high-energy collisions based on a microscopic kinetic description, in order to determine the range of applicability of an effective description in relativistic viscous hydrodynamics. We find that…

高能物理 - 唯象学 · 物理学 2023-07-18 Victor E. Ambruş , Sören Schlichting , Clemens Werthmann

We discuss recent theoretical developments in understanding the early pre-equilibrium dynamics and onset of hydrodynamic behavior in high-energy heavy-ion collisions. We highlight possible experimental signatures of the pre-equilibrium…

高能物理 - 唯象学 · 物理学 2024-01-09 Soeren Schlichting

The early dynamics in heavy-ion collisions involves a rapid, far from equilibrium evolution. This early pre-equilibrium stage of the dynamics can be modeled using kinetic equations. The effect of this pre-equilibrium stage on final…

核理论 · 物理学 2023-04-05 Piotr Bozek

General features of the formalism describing hydrodynamic evolution of transversally thermalized matter possibly produced at the very early stages of ultra-relativistic heavy-ion collisions are presented. Thermodynamical consistency of the…

核理论 · 物理学 2009-10-02 Radoslaw Ryblewski

We simulate the space-time dynamics of high-energy collisions based on a microscopic kinetic description, in order to determine the range of applicability of an effective description in relativistic viscous hydrodynamics. We find that…

高能物理 - 唯象学 · 物理学 2024-02-12 Clemens Werthmann , Victor E. Ambruş , Sören Schlichting

We simulate the space-time dynamics of high-energy collisions based on a microscopic kinetic description in the conformal relaxation time approximation, in order to determine the range of applicability of an effective description in…

高能物理 - 唯象学 · 物理学 2023-04-26 Victor E. Ambrus , S. Schlichting , C. Werthmann

The "unreasonable effectiveness" of relativistic fluid dynamics in describing high energy heavy-ion and even proton-proton collisions are demonstrated and discussed. Several recent ideas of optimizing relativistic fluid dynamics for the…

核理论 · 物理学 2019-10-02 Ulrich W. Heinz , J. Scott Moreland

The large density of matter in the interaction region of the proton-nucleus or deuteron-nucleus collisions enables the collective expansion of the fireball. Predictions of the hydrodynamic model for the asymmetric transverse flow are…

核理论 · 物理学 2015-06-22 Piotr Bozek , Wojciech Broniowski

The observation of large azimuthal anisotropies $v_n$ in the particle spectra of proton-proton (pp) and proton-nucleus (pA) collisions challenges fluid dynamic interpretations of $v_n$, as it remains unclear how small collision systems can…

高能物理 - 唯象学 · 物理学 2019-09-25 Aleksi Kurkela , Urs Achim Wiedemann , Bin Wu

Hydrodynamic model simulations of Au-Au collisions at RHIC have indicated recently, that with improved simulations in the coming years, it may be feasible to quantify the viscosity of the matter produced in heavy ion collisions. To this…

核理论 · 物理学 2008-11-26 Rudolf Baier , Paul Romatschke , Urs Achim Wiedemann

We use a hydrodynamic model to study the space-time evolution transverse to the beam direction in ultrarelativistic heavy-ion collisions with nonzero impact parameters. We focus on the influence of early pressure on the development of…

核理论 · 物理学 2009-10-09 P. F. Kolb , J. Sollfrank , P. V. Ruuskanen , U. Heinz

We use effective kinetic theory, accurate at weak coupling, to simulate the pre-equilibrium evolution of transverse energy and flow perturbations in heavy-ion collisions. We provide a Green function which propagates the initial…

高能物理 - 唯象学 · 物理学 2016-09-21 Liam Keegan , Aleksi Kurkela , Aleksas Mazeliauskas , Derek Teaney

The correlation between the harmonic flow and the transverse flow in relativistic heavy ion collisions is calculated in the hydrodynamic model. The partial correlation coefficient, corrected for fluctuations of multiplicity, is compared to…

核理论 · 物理学 2020-07-01 Piotr Bozek , Hadi Mehrabpour

Using information theory we derive a thermodynamics for systems evolving under a collective motion, i.e. under a time-odd constraint. An illustration within the Lattice gas Model is given for two model cases: a collision between two complex…

核理论 · 物理学 2015-06-26 F. Gulminelli , PH. Chomaz

Recent discussions of RHIC data emphasized the exciting possibility that the matter produced in nucleus-nucleus collisions shows properties of a near-perfect fluid. Here, we aim at delineating the applicability of fluid dynamics, which is…

高能物理 - 唯象学 · 物理学 2008-11-26 Rudolf Baier , Paul Romatschke , Urs Achim Wiedemann

I review recent selected developments in the theory and modeling of ultrarelativistic heavy-ion collisions. I explain why relativistic viscous hydrodynamics is now used to model the expansion of the matter formed in these collisions. I give…

核理论 · 物理学 2011-09-30 Jean-Yves Ollitrault

A dynamical appearance of scaling solutions in the relativistic hydrodynamics applied to describe ultra-relativistic heavy-ion collisions is studied. We consider the boost-invariant cylindrically symmetric systems and the effects of the…

核理论 · 物理学 2009-11-10 Mikolaj Chojnacki , Wojciech Florkowski , Tamas Csorgo

A minimal kinetic model is used to study analytically and numerically flows at a micrometer scale. Using the lid-driven microcavity as an illustrative example, the interplay between kinetics and hydrodynamics is quantitatively visualized.…

统计力学 · 物理学 2007-05-23 S. Ansumali , C. E. Frouzakis , I. V. Karlin , I. G. Kevrekidis
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