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Hadron spectra and elliptic flow in high-energy heavy-ion collisions are studied within a (3+1)D ideal hydrodynamic model with fluctuating initial conditions given by the AMPT Monte Carlo model. Results from event-by-event simulations are…

Nuclear Theory · Physics 2012-09-20 Longgang Pang , Qun Wang , Xin-Nian Wang

In the first part of the talk we discuss the role of the two-body nucleon-nucleon correlations on signatures of the heavy-ion collisions which are a priori expected to be sensitive to these effects. We find that while the fluctuations of…

Nuclear Theory · Physics 2010-11-02 Wojciech Broniowski , Maciej Rybczynski , Lukasz Obara , Mikolaj Chojnacki

One of the greatest uncertainties in heavy-ion collisions is the description of the initial state. Different models predict a wide range of initial energy density distributions based on their underlying assumptions. Final flow harmonics are…

Nuclear Theory · Physics 2020-07-28 Patrick Carzon , Matthew D. Sievert , Jacquelyn Noronha-Hostler

Event-by-event hydrodynamics (or hydrodynamics with fluctuating initial conditions) has been developed in the past few years. Here we discuss how it may help to understand the various structures observed in two-particle correlations.

High Energy Physics - Phenomenology · Physics 2011-03-17 R. P. G. Andrade , F. Grassi , Y. Hama , W. -L. Qian

Motivated by forthcoming experiments at RHIC and LHC, and results from SPS, a review is given of the present state of event-by-event fluctuations in ultrarelativistic heavy-ion collisions. Fluctuations in particle multiplicities, ratios,…

Nuclear Theory · Physics 2008-11-26 H. Heiselberg

We study event-by-event dynamical fluctuations of various particle ratios at different energies. We assume that particle production in final state is due to chemical equilibrium processes. We compare results from resonance gas model with…

High Energy Physics - Phenomenology · Physics 2012-07-10 A. Tawfik

This work presents an analysis of event-by-event multiplicity fluctuations as a sensitive tool for diagnosing the state of matter produced in relativistic heavy-ion collisions. Using a modified version of the HIJING Monte Carlo generator,…

High Energy Physics - Phenomenology · Physics 2026-03-12 Y. A. Rusak , L. F. Babichev

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…

Event-by-event fluctuations in the initial density distributions of the fireballs created in relativistic heavy-ion collisions lead to event-by-event fluctuations of the final anisotropic flow angles, and density inhomogeneities in the…

Nuclear Theory · Physics 2013-05-01 Ulrich W. Heinz , Zhi Qiu , Chun Shen

A new method to quantify fluctuations in the initial state of heavy ion collisions is presented. The initial state energy distribution is decomposed with a set of orthogonal basis functions which include both angular and radial variation.…

High Energy Physics - Phenomenology · Physics 2013-07-24 Christopher E Coleman-Smith , Hannah Petersen , Robert L Wolpert

Relativistic dissipative fluid dynamics is a common tool to describe the space-time evolution of the strongly interacting matter created in ultrarelativistic heavy-ion collisions. For a proper comparison to experimental data,…

Nuclear Theory · Physics 2013-05-08 H. Niemi , G. S. Denicol , H. Holopainen , P. Huovinen

Heavy-ion collisions at relativistic energies probe matter at extreme conditions of temperatures and energy densities. The study of event-by-event fluctuations of experimental observables is crucial to probe the QCD phase transition, locate…

Nuclear Experiment · Physics 2020-12-30 Tapan K. Nayak

This report summarizes the results of the work done in collaboration with K. Rajagopal and E. Shuryak. We analyze the physics behind the event-by-event fluctuations in heavy ion collisions. Using thermodynamic description of the ensemble of…

High Energy Physics - Phenomenology · Physics 2007-05-23 M. Stephanov

We overview the current status and recent developments on initial conditions in ultra-relativistic nucleus-nucleus collisions. Specifically, we look at the progress in understanding the role of sub-nucleonic fluctuations in large and small…

Nuclear Theory · Physics 2019-02-20 Aleksas Mazeliauskas

Hadron spectra and elliptic flow in relativistic heavy-ion collisions are studied in event-by-event (3+1)D ideal hydrodynamic simulations with fluctuating initial conditions given by the AMPT Monte Carlo model. Both the coherent soft gluon…

Nuclear Theory · Physics 2015-06-12 Longgang Pang , Qun Wang , Xin-Nian Wang

Multiplicity fluctuations in heavy ion collisions obtain comparable contributions both from initial stage of the collisions, and from final stage interaction. We calculate the former component, using the ``wounded nucleon'' model and…

Nuclear Theory · Physics 2007-05-23 G. V. Danilov , E. V. Shuryak

Multiplicity distributions of charged particles and their event-by-event fluctuations have been compiled for relativistic heavy-ion collisions from the available experimental data at Brookhaven National Laboratory and CERN and also by the…

Nuclear Experiment · Physics 2016-06-20 Maitreyee Mukherjee , Sumit Basu , Subikash Choudhury , Tapan K. Nayak

Flow has emerged as a crucial probe for the properties of the thermalized medium produced in relativistic heavy-ion collisions. The evolution of initial state fluctuations leaves imprints on the power spectrum of flow coefficients.…

Nuclear Theory · Physics 2021-06-29 Shreyansh S. Dave , Saumia P. S. , Ajit M. Srivastava

The PHENIX Experiment at the Relativistic Heavy Ion Collider has made measurements of event-by-event fluctuations in the net charge, the mean transverse momentum, and the charged particle multiplicity as a function of collision energy,…

Nuclear Experiment · Physics 2009-11-11 J. T. Mitchell

The dynamical charge fluctuations have been studied in ultra-relativistic heavy-ion collisions by using hadronic model simulations, such as UrQMD and HIJING. The evolution of fluctuations has been calculated at different time steps during…

Nuclear Theory · Physics 2015-03-03 Bhanu Sharma , Madan M. Aggarwal , Nihar Ranjan Sahoo , Tapan K. Nayak