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We investigate the fluctuations of the net-baryon number near the critical point of the liquid-gas phase transition. We use the parity doublet model in the mean-field approximation fixed to the zero-temperature properties of nuclear matter…

Nuclear Theory · Physics 2025-08-06 Michał Marczenko , Krzysztof Redlich , Chihiro Sasaki

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 estimate chemical freeze-out parameters in HRG and EVHRG model by fitting the experimental information of net-proton and net-charge fluctuations measured in Au + Au collisions by the STAR collaboration at RHIC. We observe that chemical…

Nuclear Theory · Physics 2017-07-11 Rama Prasad Adak , Supriya Das , Sanjay K. Ghosh , Rajarshi Ray , Subhasis Samanta

Like fluctuations, non-diagonal correlators of conserved charges provide a tool for the study of chemical freeze-out in heavy ion collisions. They can be calculated in thermal equilibrium using lattice simulations, and be connected to…

We discuss the role of cumulants of net baryon number fluctuations in the analysis of critical behavior in QCD and the study of freeze-out conditions in heavy ion experiments. Through the comparison of the current set of measurements of…

High Energy Physics - Phenomenology · Physics 2013-05-29 Frithjof Karsch , Krzysztof Redlich

We calculate cumulants of fluctuations of net-baryon number, net-electric charge and net-strangeness, in the framework of lattice regularized QCD. We use a highly improved staggered quark (HISQ) action on lattices with temporal extent of…

High Energy Physics - Lattice · Physics 2013-01-29 Christian Schmidt

We calculate the quadratic fluctuations of net baryon number, electric charge and strangeness as well as correlations among these conserved charges in (2+1)-flavor lattice QCD at zero chemical potential. Results are obtained using…

Net-baryon number, net-charge and net-strangeness fluctuations measured in ultra-relativistic heavy-ion collisions may reveal details and insights into the quark-hadron transition, hadrochemical freeze-out and possibly aid in the search of…

High Energy Physics - Phenomenology · Physics 2023-10-09 Gaurav Mukherjee , Dipanwita Dutta , Dipak Kumar Mishra

We discuss universal properties of higher order cumulants of net baryon number fluctuations and point out their relevance for the analysis of freeze-out and critical conditions in heavy ion collisions at LHC and RHIC.

High Energy Physics - Lattice · Physics 2015-05-30 Frithjof Karsch

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

The appearance of large, none-Gaussian cumulants of the baryon number distribution is commonly discussed as a signal for the QCD critical point. We review the status of the Taylor expansion of cumulant ratios of baryon number fluctuations…

High Energy Physics - Lattice · Physics 2021-11-29 C. Schmidt , J. Goswami , G. Nicotra , F. Ziesché , P. Dimopoulos , F. Di Renzo , S. Singh , K. Zambello

We report high-statistics measurements of fifth- and sixth-order factorial cumulants and cumulant ratios of (net-)proton multiplicity distributions in Au+Au collisions at $\sqrt{s_{NN}} = 7.7$--27 GeV, using data from the STAR experiment…

Nuclear Experiment · Physics 2025-12-23 The STAR Collaboration

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

The size of the average fluctuations of net baryon number and electric charge in a finite volume of hadronic matter differs widely between the confined and deconfined phases. These differences may be exploited as indicators of the formation…

High Energy Physics - Phenomenology · Physics 2009-10-09 Masayuki Asakawa , Ulrich Heinz , Berndt Muller

Fluctuations and correlations of the net-baryon number play an important role in exploring critical phenomena in phase transitions of strongly interacting matter governed by Quantum chromodynamics (QCD). In this work, we use the parity…

High Energy Physics - Phenomenology · Physics 2024-01-31 Volker Koch , Michał Marczenko , Krzysztof Redlich , Chihiro Sasaki

We calculate several diagonal and non-diagonal fluctuations of conserved charges in a system of 2+1+1 quark flavors with physical masses, on a lattice with size $48^3\times12$. Higher order fluctuations at $\mu_B=0$ are obtained as…

We study charge fluctuations within the statistical hadronization model. Considering both the particle yield ratios and the charge fluctuations we show that it is possible to differentiate between chemical equilibrium and non-equilibrium…

Nuclear Theory · Physics 2009-11-11 Giorgio Torrieri , Sangyong Jeon , Johann Rafelski

We present results on bulk thermodynamic quantities as well as net baryon number, strangeness and electric charge fluctuations in QCD at non-zero density and temperature obtained from lattice calculations with almost physical quark masses…

High Energy Physics - Lattice · Physics 2008-11-26 Chuan Miao , Christian Schmidt

The recent net-proton fluctuation results of the STAR (Solenoidal Tracker At RHIC) experiment from beam energy scan (BES) program at the BNL Relativistic Heavy Ion Collider (RHIC) have drawn much attention to exploring the QCD critical…

Nuclear Experiment · Physics 2017-04-18 Dhananjaya Thakur , Sunil Jakhar , Prakhar Garg , Raghunath Sahoo

Studying fluctuations of conserved quantities, such as baryon number, strangeness, and charge, provides insights into the properties of matter created in high-energy nuclear collisions. Lattice QCD calculations suggest that higher moments…

Nuclear Experiment · Physics 2016-11-23 Jochen Thäder