Chiral symmetry restoration versus deconfinement in heavy-ion collisions at high baryon density

Bratkovskaya, Elena; Palmese, A.; Cassing, W.; Seifert, E.; Steinert, T.; Moreau, P.

doi:10.1088/1742-6596/878/1/012018

Cited by 11 publications

(15 citation statements)

References 52 publications

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“…In the present research, we calculate the rapidity distribution, dN/dy, produced from various high energy experimental results in central (Au + Au) at energies spanning from 2 − 200 GeV, including RHIC-BRAHMS, for particles π − , π + , K − , and K + [11,20,[45][46][47][48][49][50][51][52][53][54]. The obtained results are confronted to those estimated from ANN simulation model [31,66].…”

Section: Resultsmentioning

confidence: 99%

“…The goal of this study is to compute the multiplicity per rapidity for charged pions and kaons formed from Au + Au collisions using the Landau hydrodynamical model and the ANN simulation model at energies ranging from low to high. We compare our results to experimental data from RHIC-BRAHMS [11,20,[45][46][47][48][49][50][51][52][53][54], as well as future facilities NICA and FAIR.…”

Section: Introductionmentioning

confidence: 99%

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Particles Multiplicity Based on Rapidity in Landau and Artificial Neural Network(ANN) Models

Habashy,

El-Bakry,

Tawfik

et al. 2021

Preprint

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ANN model is used to estimate the multiplicity per rapidity for charged pions and kaons observed in various high-energy experiments from central Au+Au collisions with energies ranging from 2-200 GeV, and then compared to available experimental data, including RHIC-BRAHMS, and the future facilities at NICA and FAIR. We also used Landau hydrodynamical approach, which has a better describtion for the evolution of hot and dense matter produced in ultra-relativistic heavy-ion collisions.The approach is fitted to both results estimated from experiment and ANN simulation. We noticed that the Landau model accurately reproduces the entire range of multiplicity per rapidity for all created particles at all energies. Also ANN model can reproduce the multiplicity per rapidity very well for all considered particles.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Particles Multiplicity Based on Rapidity in Landau and Artificial Neural Network(ANN) Models

Habashy,

El-Bakry,

Tawfik

et al. 2021

Preprint

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“…One can notice easily from Fig. 3 [8][9][10], from chiral perturbation theory (red) [13][14][15], from Lattice QCD (magenta ) [18][19][20]22], from various other models (blue) [25,26,28] and from the DSE(green) approach [24].…”

Section: Numerical Calculations and Resultsmentioning

confidence: 99%

“…[9,10] give the value around 60 MeV with quite small error bars. Theoretically the pion-nucleon sigma term could be calculated in chiral perturbation theory [13][14][15][16], lattice QCD [17][18][19][20][21][22], Dyson-Schwinger Equations(DSE) approach of QCD [23,24] and various other models [25][26][27][28]. However, theoretical results varies largely with different methods.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of pion-nucleon sigma term in Dyson-Schwinger equation approach of QCD

2020

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We calculate the variation of the chiral condensate in medium with respect to the quark chemical potential and evaluate the pion-nucleon sigma term via the Hellmann-Feynman theorem. The variation of chiral condensate in medium are obtained by solving the truncated Dyson-Schwinger equation for quark propagator at finite chemical potential, with different ansätz for the quark-gluon vertex and gluon propagator. We obtain the value of the sigma term σπN = 62(1)(2) MeV, where the first represents the systematic error due to our different ansätz for the quark-gluon vertex and gluon propagator and the second represents a statistical error in our linear fitting procedure. Our result favors a relatively large value and is consistent very well with the recent data obtained by analyzing the pion-nucleon scattering and pionic atom experiments. *

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“…The general opinion in the literature is that at the extreme conditions, hadrons cannot survive as bound states [37], instead they dissociate to a new Quark-Gluon Plasma (QGP) state [38], and in this case, chiral symmetry is partially restored. The features of the deconfined state of matter, as well as the phase boundaries from hadronic-to-quark-gluon degrees of freedom, are still discussed near the so-called critical temperature T c ∼ = 155 MeV [39][40][41]. Lattice QCD calculations indicate that the chiral symmetry restoration occurs at about the same critical temperature and energy density as the deconfinement phase transition at the vanishing baryon chemical potential [40][41][42][43].…”

Section: Introductionmentioning

confidence: 99%

Modifications on the Properties of \(D^*_{s0}\)(2317) as Four-quark State in Thermal Medium

Türkan¹,

Süngü²,

Veliev³

2022

Acta Phys. Pol. B

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The low mass of D * s0 (2317) presents problems for the conventional quark model, leading to consideration of other options regarding a multi-quark system. Here, we investigate the scalar open-charm state D * s0 (2317) and its bottom partner by the Thermal QCD Sum Rules (TQCDSR) method using the two-point correlation function with contributions of the nonperturbative condensates up to dimension six. Our calculations indicate that the variations in mass and decay constant values are stable through temperatures up to T ∼ = 100 MeV and fall after this point. At the critical temperature, the values of mass and decay constant change up to 94%, 71% of their values in vacuum in the molecular scenario, and 94%, 75% in the diquark-antidiquark scenario. Besides, we find more dramatic changes in mass and decay constant above T c , and hence we interpret it as the hadrons starting to disappear. Also, the detailed search for hot medium effects on the hadronic parameters of open-charm meson D * s0 (2317) and the bottom partner may have implications for the QCD phase diagram derived from heavy-ion collision experiments. Finally, these results may help distinguish conventional quark model mesons from exotic states.

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Chiral symmetry restoration versus deconfinement in heavy-ion collisions at high baryon density

Cited by 11 publications

References 52 publications

Particles Multiplicity Based on Rapidity in Landau and Artificial Neural Network(ANN) Models

Particles Multiplicity Based on Rapidity in Landau and Artificial Neural Network(ANN) Models

Evaluation of pion-nucleon sigma term in Dyson-Schwinger equation approach of QCD

Modifications on the Properties of \(D^*_{s0}\)(2317) as Four-quark State in Thermal Medium

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