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Event-by-event multiplicity fluctuations in nucleus-nucleus collisions are studied within the relativistic transport models: EPOS, PHSD, and UrQMD. As measures of particle number fluctuations we consider the scaled variances $\omega[X]$ for…

We calculate the first four moments of baryon number, electric charge and strangeness fluctuations within the hadron resonance gas model. Different moments and their ratios as well as skewness and kurtosis are evaluated on the…

High Energy Physics - Phenomenology · Physics 2011-06-27 Frithjof Karsch , Krzysztof Redlich

Within the framework of the dynamical recombination approach implemented in the partonic/hadronic quark Molecular Dynamics (qMD) model, we investigate numerous QGP signals constructed from the correlations and fluctuations of conserved…

High Energy Physics - Phenomenology · Physics 2008-03-20 Stephane Haussler , Marcus Bleicher , Horst Stoecker

We present simulation results of net charge fluctuation in $Au+Au$ collisions at $\sqrt{s_{nn}}$=130 GeV from a dynamic model, JPCIAE. The calculations are done for the quark-gluon phase before hadronization, the pion gas, the resonance…

Nuclear Theory · Physics 2018-01-17 Ben-Hao Sa , Xu Cai , an Tai , Zhong-Qi Wang , Dai-Mei Zhou

We report measurements for the balance function, transverse momentum fluctuations, and net charge fluctuations from Au+Au collisions at 20, 130, and 200 GeV as well as p+p and d+Au collisions at 200 GeV using STAR at RHIC. For Au+Au…

Nuclear Experiment · Physics 2009-11-10 Gary D. Westfall

We perform quantum calculations of fluctuations of the electromagnetic fields in $AA$ collisions at RHIC and LHC energies. The analysis is based on the fluctuation-dissipation theorem. We find that in the quantum picture the field…

Nuclear Theory · Physics 2017-06-28 B. G. Zakharov

We present a systematic investigation of the transverse-momentum differential radial flow fluctuations observable $v_0(p_T)$ in relativistic heavy-ion collisions at top RHIC ($\sqrt{s_\mathrm{NN}}{\,=\,}200$ GeV) and LHC…

Nuclear Experiment · Physics 2026-01-09 Lipei Du

Event-by-event \gamma-charge correlation is used in studying systems going through QCD chiral phase transition. In this paper various methods for measuring \gamma-charge correlation in heavy ion collisions have been discussed. Dynamical…

Nuclear Experiment · Physics 2015-03-19 Prithwish Tribedy , Subhasis Chattopadhyay , Aihong Tang

A study of Event by Event analysis of maximum Pseudo-rapidity Gap Fluctuation in heavy-ion collisions in terms of the scaled variance {\omega} has been carried out for relativistic AA collisions with multiplicity cut (N >10) using nuclear…

Nuclear Experiment · Physics 2019-07-24 Swarnapratim Bhattacharyya , Maria Haiduc , Alina Tania Neagu , Elena Firu

Based on Hijing-1.37 simulations, event-wise mean-pt fluctuations in Au-Au collisions at sqrt-sNN = 200 GeV are studied with graphical and numerical methods. This study shows that jets/minijets could represent a substantial source of…

High Energy Physics - Phenomenology · Physics 2009-11-10 Qingjun Liu , Thomas A. Trainor

We perform the first simultaneous Bayesian inference of the temperature-dependent heavy-quark spatial diffusion coefficient $2\pi T\mathcal{D}_s$ and the scaled jet transport coefficient $\hat{q}/T^3$ in the quark-gluon plasma, utilizing…

Nuclear Theory · Physics 2026-04-17 Xu-Fei Xue , Zi-Xuan Xu , Wei Dai , Jiaxing Zhao , Ben-Wei Zhang

Within a hadron-string dynamical transport approach (HSD) we investigate the attenuation of high transverse momentum ($\pT$) hadrons as well as the suppression of 'near-side' and 'far-side' jets in $Au+Au$ collisions at invariant energies…

High Energy Physics - Phenomenology · Physics 2009-11-10 K. Gallmeister , W. Cassing

A simple model for medium modification of the jet function can be used to extract the jet energy loss distribution through a parameterized form. We carry out a comprehensive Bayesian analysis of the world data on single inclusive jet…

High Energy Physics - Phenomenology · Physics 2023-10-06 Jordan Wu , Weiyao Ke , Xin-Nian Wang

Hydrodynamic fluctuations have been studied in a wide variety of physical, chemical, and biological phenomena in the past decade. In high energy heavy ion collisions, there will be intrinsic fluctuations even if the initial conditions are…

Nuclear Theory · Physics 2013-06-18 Joseph I. Kapusta , Juan M. Torres-Rincon

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

We present a comprehensive model study of the eigen-microstate approach (EMA) for identifying critical fluctuations in relativistic heavy-ion collisions. Using UrQMD and two stochastic baseline models, we demonstrate that EMA is insensitive…

The fluctuation-dissipation mechanism underlying non-equilibrium transport in low-energy heavy-ion reactions remains unclear. Although the time-dependent Hartree-Fock (TDHF) method provides a reasonable description of average reaction…

Nuclear Theory · Physics 2025-07-02 Zepeng Gao , Kazuyuki Sekizawa , Long Zhu

Experimental and theoretical studies of fluctuations in nucleus-nucleus interactions at high energies have started to play a major role in understanding of the concept of strong interactions. The elaborated procedures have been developed to…

High Energy Physics - Experiment · Physics 2021-07-28 M. Mackowiak-Pawlowska , M. Naskręt , M. Gazdzicki

We present temperature ($T$) and baryonic chemical potential ($\mu_B$) dependence of higher order fluctuations and correlation between conserved charges in Excluded Volume Hadron Resonance Gas (EVHRG) model. Products of moments, such as…

High Energy Physics - Phenomenology · Physics 2015-06-17 Abhijit Bhattacharyya , Supriya Das , Sanjay K. Ghosh , Rajarshi Ray , Subhasis Samanta

We explore net charge probability distributions in heavy ion collisions within the hadron resonance gas model. The distributions for strangeness, electric charge and baryon number are derived. We show that, within this model, net charge…

High Energy Physics - Phenomenology · Physics 2015-06-03 P. Braun-Munzinger , B. Friman , F. Karsch , K. Redlich , V. Skokov