Conserved number fluctuations in a hadron resonance gas model

Garg, P.; Mishra, D. K.; Netrakanti, P. K.; Mohanty, B.; Mohanty, A. K.; Singh, B. K.; Xu, N.

doi:10.1016/j.physletb.2013.09.019

Cited by 125 publications

(112 citation statements)

References 24 publications

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“…[28], in which the equation of state is studied, under the assumption that mesons are pointlike, while baryons and antibaryons have a finite hard-core radius. Refining the hadron-resonance-gas model for QCD could have important phenomenological implications: for example, it may improve the modeling of conserved-charge fluctuations [29], which are an important tool to explore the QCD phase diagram.…”

Section: Introductionmentioning

confidence: 99%

Excluded-volume effects for a hadron gas in Yang-Mills theory

et al. 2017

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When the multiplicities of particles produced in heavy-ion collisions are fitted to the hadron-resonancegas model, excluded-volume effects play a significant role. In this work, we study the impact of such effects on the equation of state of pure Yang-Mills theory at low temperatures, comparing the predictions of the statistical model with lattice results. In particular, we present a detailed analysis of the SU(2) and SU(3) Yang-Mills theories: we find that, for both of them, the best fits to the equilibrium thermodynamic quantities are obtained when one assumes that the volume of different glueball states is inversely proportional to their mass. The implications of these findings for QCD are discussed.

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Section: Introductionmentioning

confidence: 99%

Excluded-volume effects for a hadron gas in Yang-Mills theory

et al. 2017

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“…[59] where actual experimental acceptances in terms of pseudo-rapidity and transverse momentum are considered. In Ref.…”

Section: Introductionmentioning

confidence: 99%

Fluctuations and correlations of conserved charges in an excluded-volume hadron resonance gas model

et al. 2014

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We present temperature (T ) and baryonic chemical potential (µB) dependence of higher order fluctuations and correlation between conserved charges in Excluded Volume Hadron Resonance Gas (EVHRG) model. Products of moments, such as ratio of variance to mean (σ 2 /M ), product of skewness and standard deviation (Sσ), product of kurtosis and variance (κσ 2 ), for net-proton, netkaon and net-charge have been evaluated on the phenomenologically determined freeze-out curve. Further, products of moments for net-proton and net-charge have been compared with the experimental data measured by STAR experiment. The dependence of the model result on the hadronic radius parameter has also been discussed.

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“…Detailed discussions of the different versions of HRG model and some of the recent works using these models may be found in Refs. [37,[39][40][41][42][43][44][45][46][47][48][49][50][51][52][53][54]. In this work we plan to discuss the simplest version namely the non-interacting HRG.…”

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confidence: 99%

Thermodynamics and fluctuations of conserved charges in a hadron resonance gas model in a finite volume

et al. 2015

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The thermodynamics of hot and dense matter created in heavy-ion collision experiments are usually studied as a system of infinite volume. Here we report on possible effects for considering a finite system size for such matter in the framework of the Hadron Resonance Gas model. The bulk thermodynamic variables as well as the fluctuations of conserved charges are considered. We find that the finite size effects are insignificant once the observables are scaled with the respective volumes. The only substantial effect is found in the fluctuations of electric charge which may therefore be used to extract information about the volume of fireball created in heavy-ion collision experiments.PACS numbers: 12.38. Mh,21.65.Mn, Our present day universe contains a significant fraction of matter in hadronic form. In the very early universe − a few microseconds after the Big Bang [1] when the temperature was extremely high, the strongly interacting matter is expected to have existed in the partonic form. Similar exotic state of matter may exist inside compact stars due to extremely high matter density attained by gravitational compression [2]. For the last few decades various experimental efforts are being made to recreate such exotic matter through the collisions of heavy-ions at ultra-relativistic energies. Experimental facilities at CERN (France/Switzerland), BNL (USA) and the upcoming facility at GSI (Germany) are at the forefront of efforts taken to create these exotic states of matter. One of the major goals in the experiments is to study thermodynamic properties of strongly interacting matter at high temperatures and densities. Present experimental data as well as lattice QCD simulations seem to indicate a smooth cross over from hadronic to quark gluon matter at low density and high temperature [3,4]. At high density and low temperature a first order transition is expected [5][6][7][8][9][10].Usually any thermodynamic study assumes the system volume to be infinite. However the fireball created in the relativistic heavy ion collision experiments has a finite spatial volume. The size of such spatial volume critically depends on three parameters : the size of the colliding nuclei, the center of mass energy ( √ s) and the centrality of collisions. Analysis of experimental data could reveal the freeze out volume of the system. One way to carry out such an analysis is the study of HBT radii which has been done in Ref.[11]. The major finding of this study indicates that the freeze out volume increases as the √ s increases and the estimated freeze out volume varies from 2000 f m 3 to 3000 f m 3 . Another way of estimating the system size is through the comparison of simulation results with the experimental data as done in Ref. [12] where the UrQMD model [13] is used for this purpose. A study of the P b − P b collisions at different energies and centralities resulted in a freeze-out volume in the range 50 f m 3 to 250 f m 3 . We note that these volumes as quoted above, are the freeze out volumes and as one looks back to the early...

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Conserved number fluctuations in a hadron resonance gas model

Cited by 125 publications

References 24 publications

Excluded-volume effects for a hadron gas in Yang-Mills theory

Excluded-volume effects for a hadron gas in Yang-Mills theory

Fluctuations and correlations of conserved charges in an excluded-volume hadron resonance gas model

Thermodynamics and fluctuations of conserved charges in a hadron resonance gas model in a finite volume

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