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We investigate the effects of saturation dynamics on midrapidity flow observables by adding fluctuating hotspots into the novel Monte Carlo EKRT (MC-EKRT) event generator for high-energy nuclear collisions. We demonstrate that the intensity…

高能物理 - 唯象学 · 物理学 2024-07-02 Henry Hirvonen , Mikko Kuha , Jussi Auvinen , Kari J. Eskola , Yuuka Kanakubo , Harri Niemi

We discuss several possible caveats which arise with the interpretation of measurements of fluctuations in heavy ion collisions. We especially focus on the ratios of particle yields, which has been advocated as a possible signature of a…

核理论 · 物理学 2011-08-04 Michael Hauer , Sascha Vogel

We explore the dependence of the pT correlations in the event-by-event analysis of relativistic heavy-ion collisions at RHIC made recently by the PHENIX and STAR Collaborations. We point out that the observed scaling of strength of…

核理论 · 物理学 2009-11-11 W. Broniowski , W. Florkowski , B. Hiller , P. Bozek

The event-by-event analysis of high energy nuclear collisions aims at revealing the richness of the underlying event structures and provide unique measures of dynamical fluctuations associated with QGP phase transition. The major challenge…

核实验 · 物理学 2008-11-26 Tapan K. Nayak

We discuss recently measured event-by-event multiplicity fluctuations in relativistic heavy-ion collisions. It is shown that the non-monotonic behavior of the multiplicity fluctuations as a function of collision centrality can be fully…

核理论 · 物理学 2009-11-10 M. Rybczynski , Z. Wlodarczyk

A new class of observables is introduced which aims to characterize the superstructure of an event, that is, features, such as color flow, which are not determined by the jet four-momenta alone. Traditionally, an event is described as…

高能物理 - 唯象学 · 物理学 2014-11-20 Jason Gallicchio , Matthew D. Schwartz

We study causal viscous hydrodynamics in the context of central relativistic heavy-ion collisions and provide details of a straightforward numerical algorithm to solve the hydrodynamic equations. It is shown that correlation functions of…

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

Rapidity decorrelation in high energy heavy-ion collisions is one of the hot topics in understanding longitudinal dynamics of the quark gluon plasma (QGP). In this study we employ an integrated dynamical model with full three dimensional…

核理论 · 物理学 2020-01-08 Azumi Sakai , Koichi Murase , Tetsufumi Hirano

Several theoretical results concerning event-by-event fluctuations are discussed: (1) a role of the global conservation laws and concept of statistical ensembles; (2) strongly intensive measures are introduced; they give a possibility to…

核理论 · 物理学 2015-05-18 Mark I. Gorenstein

We propose a differential hydrodynamic response relation, $V_2(\zeta)=\int d\xi G(\zeta-\xi) \mathcal{E}_2(\xi)$, to describe the formation of a pseudorapidity dependent elliptic flow in heavy-ion collisions, in response to a fluctuating…

核理论 · 物理学 2020-01-31 Hui Li , Li Yan

Energy correlators have recently been proposed as a class of jet substructure observables that directly link experimental measurements of the asymptotic energy flux with the field theoretic description of the underlying microscopic…

高能物理 - 唯象学 · 物理学 2024-09-18 Carlota Andres , Fabio Dominguez , Jack Holguin , Cyrille Marquet , Ian Moult

We performed a systematic study on the formation of vorticity rings as the process for jet thermalization in the medium created in high-energy nuclear collisions. In this work, we expanded our previous analysis to a more realistic framework…

We study how fluctuations in fluid dynamic fields can be dissipated or amplified within the characteristic spatio-temporal structure of a heavy ion collision. The initial conditions for a fluid dynamic evolution of heavy ion collisions may…

核理论 · 物理学 2012-08-20 Stefan Floerchinger , Urs Achim Wiedemann

Flow observables in heavy-ion reactions at incident energies up to about 1 GeV per nucleon have been shown to be very useful for investigating the reaction dynamics and for determining the parameters of reaction models based on transport…

核实验 · 物理学 2014-03-25 P. Russotto , M. D. Cozma , A. Le Fevre , Y. Leifels , R. Lemmon , Q. Li , J. Lukasik , W. Trautmann

Within A Multi-Phase Transport model, we investigate decorrelation of event planes over pseudorapidity and its effect on azimuthal anisotropy measurements in relativistic heavy-ion collisions. The decorrelation increases with increasing…

核理论 · 物理学 2013-05-30 Kai Xiao , Feng Liu , Fuqiang Wang

We compare v2/{\epsilon}2 and v3/{\epsilon}3 from single-shot and event-by-event (2+1)-dimensional hydrodynamic calculations and discuss the validity of using single-shot calculations as substitutes for event-by-event calculations. Further…

核理论 · 物理学 2012-04-26 Zhi Qiu , Ulrich W Heinz

Since their discovery, fluctuations in the initial state of heavy-ion collisions have been understood as originating mostly from the random positions of nucleons within the colliding nuclei. We consider an alternative approach where all the…

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

The dynamic separation into phases of high and low baryon density in a heavy ion collision can enhance fluctuations of the net rapidity density of baryons compared to model expectations. We demonstrate that event-by-event proton and…

核理论 · 物理学 2009-11-07 David Bower , Sean Gavin

After the start of the LHC, a plethora of novel observables for jet tomography in heavy-ion collisions has appeared. Many of these studies have yielded counter-intuitive null results of apparently unmodified jets, which have sparked…

高能物理 - 唯象学 · 物理学 2013-11-27 Thorsten Renk