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We study the correlation between the distributions of the net-charge, net-kaon, net-baryon and net-proton number at hadronization and after the final hadronic decoupling by simulating ultra relativistic heavy ion collisions with the hybrid…

Nuclear Theory · Physics 2017-11-23 J. Steinheimer , V. Vovchenko , J. Aichelin , M. Bleicher , H. Stöcker

Strongly intensive measures $\Delta$ and $\Sigma$ are used to study event-by-event fluctuations of hadron multiplicities in nucleus-nucleus collisions. The effects of resonance decays are investigated within statistical model and…

Nuclear Theory · Physics 2015-05-19 Viktor V. Begun , Mark I. Gorenstein , Katarzyna Grebieszkow

Dynamic fluctuations in the local density of non-identified hadron tracks reconstructed in the STAR TPC are studied using the discrete wavelet transform power spectrum technique which involves mixed event reference sample comparison. The…

Nuclear Experiment · Physics 2012-08-27 STAR Collaboration

We study chemical freeze-out parameters for heavy-ion collisions by performing two different thermal analyses. We analyze results from thermal fits for particle yields, as well as, net-charge fluctuations in order to characterize the…

The event-by-event charge fluctuation measurements are proposed to provide the signature of quark-gluon plasma (QGP) in heavy-ion collisions. Measure of dynamical charge fluctuations is expected to carry information of initial fractional…

Nuclear Theory · Physics 2023-12-07 Bhanu Sharma , P. K. Sahu

In relativistic heavy-ion collisions, the event-by-event mean transverse momentum fluctuations are sensitive to overlap area and energy density fluctuations in initial state. We present a framework to calculate $p_{\mathrm{T}}$ fluctuations…

Nuclear Theory · Physics 2022-09-01 Somadutta Bhatta , Chunjian Zhang , Jiangyong Jia

The Poisson-liked statistical fluctuations, which are caused by the finite number of produced particles, are firstly estimated for the cumulants of conserved charges, i.e., the cumulants of net-baryon, net-electric charge, and…

Nuclear Theory · Physics 2014-01-22 Xue Pan , Fan Zhang , Zhiming Li , Lizhu Chen , Mingmei Xu , Yuanfang Wu

Non-statistical event-by-event fluctuations in relativistic heavy-ion collisions have been proposed as a probe of the phase transition of hadronic matter to a deconfined phase of quarks and gluons, the so-called Quark-Gluon Plasma. In a…

High Energy Physics - Experiment · Physics 2019-08-13 Nirbhay Kumar Behera

The kaon to pion ratio $K^+/\pi^+$ and the scaled variance $\omega^-$ for fluctuations of negatively charged particles are studied within the statistical hadron resonance gas (HRG) model and the Ultra relativistic Quantum Molecular Dynamics…

Nuclear Theory · Physics 2019-03-27 A. Motornenko , V. V. Begun , V. Vovchenko , M. I. Gorenstein , H. Stoecker

Understanding the phase diagram of QCD by measuring fluctuations of conserved charges in heavy-ion collision is one of the main goals of the beam energy scan program at RHIC. Within this work, we calculate the role of hadronic interactions…

Nuclear Theory · Physics 2023-05-10 Jan Hammelmann , Hannah Elfner

A quantitatively reliable theoretical description of the dynamics of fluctuations in non-equilibrium is indispensable in the experimental search for the QCD critical point by means of ultra-relativistic heavy-ion collisions. In this work we…

Nuclear Theory · Physics 2019-06-26 Marlene Nahrgang , Marcus Bluhm , Thomas Schaefer , Steffen A. Bass

Charge fluctuations provide a possible signature for the existence of the de-confined Quark Gluon Plasma phase (QGP). Being sensitive to the square of the charges, fluctuations in QGP, with fractionally charged partons, are significantly…

Nuclear Experiment · Physics 2012-08-27 Satyajit Jena for ALICE Collaboration

Dynamical fluctuations of the globally conserved quantities in heavy ion collision such as baryon number, strangeness, charge, and isospin are suggested to carry information about the deconfinement and chiral phase transitions. The STAR…

Nuclear Experiment · Physics 2015-06-12 Prithwish Tribedy

For the discovery of the QCD critical point it is crucial to develop dynamical models of the fluctuations of the net-baryon number that can be embedded in simulations of heavy-ion collisions. In this proceeding, we study the dynamical…

Nuclear Theory · Physics 2021-02-03 Masakiyo Kitazawa , Grégoire Pihan , Nathan Touroux , Marcus Bluhm , Marlene Nahrgang

Fluctuations of conserved quantities are sensitive observables to probe the signature of QCD phase transition and critical point in heavy-ion collisions. With the UrQMD model, we have studied the centrality and energy dependence of various…

Nuclear Experiment · Physics 2016-08-03 Ji Xu , Shili Yu , Feng Liu , Xiaofeng Luo

Fluctuations of conserved quantities in heavy-ion collisions are used to probe the phase transition and the QCD critical point for the strongly interacting hot and dense nuclear matter. The STAR experiment has carried out moment analysis of…

Nuclear Experiment · Physics 2015-05-01 Xiaofeng Luo

We present measurements of net charge and transverse momentum fluctuations in Au + Au collisions at ?sNN = 20, 130, and 200 GeV reported in our QM 2004 poster using measures ?+-,dyn and <?pt,1 ?pt,2>. We observe the dynamical fluctuations…

Nuclear Experiment · Physics 2009-11-10 C. Pruneau

In heavy-ion collisions, the initial collision geometry and its fluctuations drive the collective expansion of final-state hadrons in the transverse plane. However, longitudinal fluctuations induce event-plane twist and flow magnitude…

Nuclear Theory · Physics 2026-01-07 Gaoguo Yan , Maowu Nie , Zhenyu Chen , Li Yi , Jiangyong Jia

We present measurements of net charge fluctuations in $Au + Au$ collisions at $\sqrt{s_{NN}} = $ 19.6, 62.4, 130, and 200 GeV, $Cu + Cu$ collisions at $\sqrt{s_{NN}} = $ 62.4, 200 GeV, and $p + p$ collisions at $\sqrt{s} = $ 200 GeV using…

Nuclear Experiment · Physics 2019-08-13 Monika Sharma

We report the first measurement of the net-charge fluctuations in Pb-Pb collisions at $\sqrt{s_{\rm NN}}$ = 2.76 TeV, measured with the ALICE detector at the CERN Large Hadron Collider. The dynamical fluctuations per unit entropy are…

Nuclear Experiment · Physics 2016-06-23 ALICE Collaboration