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A summary of recent researches on nuclear dynamics with realistic microscopic quantum approaches is presented. The Balian-V\'en\'eroni variational principle is used to derive the time-dependent Hartree-Fock (TDHF) equation describing the…

Nuclear Theory · Physics 2014-06-03 Cédric Simenel

Event-by-event fluctuations of the baryon number, which is mostly carried by protons and neutrons, in relativistic heavy-ion collisions provide a sensitive probe for locating the conjectured critical point in the quantum chromodynamics…

Nuclear Theory · Physics 2025-12-24 Yi-Heng Feng , Che Ming Ko , Xiaofeng Luo , Yu-Gang Ma , Kai-Jia Sun , Song Zhang

Fluctuations of the proton number distribution in central Au-Au collisions have been measured by the STAR collaboration in a beam energy scan at the Relativistic Heavy Ion Collider (RHIC). The motivation is a search for evidence of a…

Nuclear Theory · Physics 2015-10-21 M. Albright , J. Kapusta , C. Young

The time evolution of particle number fluctuations in nuclear collisions at intermediate energies ($E_{\rm lab} = 1.23-10A$ GeV) is studied by means of the UrQMD-3.5 transport model. The transport description incorporates baryonic…

High Energy Physics - Phenomenology · Physics 2023-03-10 O. Savchuk , R. V. Poberezhnyuk , A. Motornenko , J. Steinheimer , M. I. Gorenstein , V. Vovchenko

We investigate fluctuations in the canonical ensemble of an Abelian charge, such as baryon number. Our focus is on cumulants and factorial cumulants of baryon and antibaryon multiplicity distributions, including their sum and difference, in…

Nuclear Theory · Physics 2025-08-27 Bengt Friman , Krzysztof Redlich , Anar Rustamov

We explore the relation between proton and nucleon number fluctuations in the final state in relativistic heavy ion collisions. It is shown that the correlations between the isospins of nucleons in the final state are almost negligible over…

Nuclear Theory · Physics 2015-06-05 Masakiyo Kitazawa , Masayuki Asakawa

In heavy ion collisions particle distributions fluctuate from event to event. It is interesting to study local fluctuations of a specific particle specie, e.g. baryons, in the transverse plane. Fluctuations of the harmonic flow provide an…

Nuclear Theory · Physics 2026-01-16 Piotr Bozek

Particle number fluctuations and correlations in nucleus-nucleus collisions at SPS and RHIC energies are studied within the statistical hadron-resonance gas model in different statistical ensembles and in the Hadron-String-Dynamics (HSD)…

Nuclear Theory · Physics 2009-11-09 V. P. Konchakovski , M. Hauer , M. I. Gorenstein , E. L. Bratkovskaya

We present the first measurement of fluctuations from event to event in the production of strange particles in collisions of heavy nuclei. The ratio of charged kaons to charged pions is determined for individual central Pb+Pb collisions.…

High Energy Physics - Experiment · Physics 2008-11-26 Afanasiev , NA49 collaboration

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

Event-by-event particle ratio fluctuations for simulated data sets of three different models named UrQMD, AMPT, and Pythia are studied using the fluctuation variable $\nu_{dyn}$. The simulated data sets produced in $pp$ collisions at four…

High Energy Physics - Phenomenology · Physics 2023-11-01 Subhadeep Paul , Tumpa Biswas , Dipak Ghosh , Mehedi Kalam , Prabir Kr. Halder

Baryon number cumulants are invaluable tools to diagnose the primordial stage of heavy ion collisions if they can be measured. In experiments, however, proton number cumulants have been measured as substitutes. In fact, proton number…

Nuclear Theory · Physics 2015-05-28 Masakiyo Kitazawa , Masayuki Asakawa

I discuss the role and impact of net-baryon number conservation in measurements of net proton fluctuations in heavy-ion collisions. I show that the magnitude of the fluctuations is entirely determined by the strength of two particle…

Nuclear Theory · Physics 2019-09-18 Claude A Pruneau

We develop a framework to relate proton number cumulants measured in heavy-ion collisions within a momentum space acceptance to the susceptibilities of baryon number, assuming that particles are emitted from a fireball with uniform…

High Energy Physics - Phenomenology · Physics 2022-08-30 Volodymyr Vovchenko , Volker Koch

We study the influence of global baryon number conservation on the non-critical baseline of net baryon cumulants in heavy-ion collisions in a given acceptance, accounting for the asymmetry between the mean-numbers of baryons and…

The multiplicity fluctuations are studied in the van der Waals excluded volume hadron-resonance gas model. The calculations are done in the grand canonical ensemble within the Boltzmann statistics approximation. The scaled variances for…

Nuclear Theory · Physics 2008-11-26 M. I. Gorenstein , M. Hauer , D. O. Nikolajenko

The measurement of particle correlations and fluctuations has been suggested as a method to search for the existence of a phase transition in relativistic heavy ion collisions. If quark-gluon matter is formed in the collision of…

Nuclear Experiment · Physics 2019-08-13 Terence J. Tarnowsky

A particle-number projection technique is used to calculate transfer probabilities in the $^{16}$O+$^{208}$Pb reaction below the fusion barrier. The time evolution of the many-body wave function is obtained with the time-dependent…

Nuclear Theory · Physics 2010-11-11 Cédric Simenel

New edition of the review [EPJA 48, (2012) 152]. The increase in computational power has naturally led to new applications of mean-field (and beyond) methods. This is particularly the case of quasi-fission reactions. Since the first…

Nuclear Theory · Physics 2025-09-22 Cédric Simenel

The study of event-by-event fluctuations of net-baryon number in a subspace of full phase space is a promising direction for deciphering the structure of strongly interacting matter created in head-on collisions of relativistic heavy…

Nuclear Theory · Physics 2024-08-20 Peter Braun-Munzinger , Krzysztof Redlich , Anar Rustamov , Johanna Stachel
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