Phase diagram and thermal properties of strong-interaction matter

Gao, Fei; Chen, Jing; Liu, Yuxin; Qin, Si‐xue; Roberts, Craig D.; Schmidt, S.

doi:10.1103/physrevd.93.094019

Cited by 72 publications

(77 citation statements)

References 70 publications

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“…reference curvature κ N f = 2 N f = 2 + 1 fRG: this work 0.0176(1) 0.0142 (2) lattice: [44] 0.0149 (21) lattice: [47] 0.0144 (26) lattice: [49] 0.015 (4) DSE: [37] 0.0238 DSE: [63] 0.038 lattice: [204] 0.0078 (39) lattice: [205] 0.0056 (6) All results, including DSE, are summarised in Table II. For a comparison to other results and potential implications for experimental CEP searches, we also refer to the discussion in the introduction, Section I, and in particular Figure 1.…”

Section: For Larger Scales Kmentioning

confidence: 91%

“…Our result for the pseudocritical temperature and the curvature of the phase boundary agree very well with the lattice. We also show predictions of the DSE approach from different groups, [37] (Fischer et al) and [63] (Gao et al). Finally we included the freeze-out data from [2] (STAR), [64] (Alba et al), [3] (Andronic et al), [65] (Becattini et al), and [66] (Vovchenko et al).…”

Section: Introductionmentioning

confidence: 91%

“…Other theoretical results: lattice QCD based on an analytic continuation from the imaginary chemical potential [44] (WB), lattice QCD based on a Taylor expansion in chemical potential [49] (HotQCD), DSE approach with backcoupled quarks and a dressed vertex [37] (Fischer et al), and DSE calculations with a gluon model [63] (Gao et al). Freeze-out data: [2] (STAR), [ ature is T c = 156 MeV.…”

Section: Introductionmentioning

confidence: 99%

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QCD phase structure at finite temperature and density

2020

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We discuss the phase structure of QCD for N f = 2 and N f = 2 + 1 dynamical quark flavours at finite temperature and baryon chemical potential. It emerges dynamically from the underlying fundamental interactions between quarks and gluons in our work. To this end, starting from the perturbative high-energy regime, we systematically integrate-out quantum fluctuations towards low energies by using the functional renormalisation group. By dynamically hadronising the dominant interaction channels responsible for the formation of light mesons and quark condensates, we are able to extract the phase diagram for µB/T 6. We find a critical endpoint at (TCEP, µB CEP ) = (107, 635) MeV. The curvature of the phase boundary at small chemical potential is κ = 0.0142(2), computed from the renormalised light chiral condensate ∆ l,R . Furthermore, we find indications for an inhomogeneous regime in the vicinity and above the chiral transition for µB 417 MeV. Where applicable, our results are in very good agreement with the most recent lattice results. We also compare to results from other functional methods and phenomenological freeze-out data. This indicates that a consistent picture of the phase structure at finite baryon chemical potential is beginning to emerge. The systematic uncertainty of our results grows large in the density regime around the critical endpoint and we discuss necessary improvements of our current approximation towards a quantitatively precise determination of QCD phase diagram.

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Section: For Larger Scales Kmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

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QCD phase structure at finite temperature and density

2020

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“…19 needs to be regularized which is done by subtracting a temperature independent term, see Refs. [37,41,90] for details:…”

Section: Quark Number Densitymentioning

confidence: 99%

Dense two-color QCD from Dyson-Schwinger equations

Contant

Huber

2020

Phys. Rev. D

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We investigate quantum chromodynamics with two colors at nonvanishing density using Dyson-Schwinger equations. Lattice methods do not have a complex action problem in this theory. Thus, we can benchmark our results and the effect of truncations directly by comparing with the corresponding lattice results. We do so for the gluon propagator, the chiral condensate and the quark number density and test variations of the employed truncation to improve the agreement. Finally, we compare the effect of a truncation on the chiral and confinement/deconfinement transitions in the phase diagrams of QCD and QCD with the gauge groups SU (2) and G2.

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“…Some QCD based models (e.g., [8][9][10][11][12][13][14][15][16]) and the DysonSchwinger equation approach [17][18][19][20][21] show that QGP undergoes a first-order chiral transition at large chemical potential. In the endpoint of the first-order transition there exists a crita e-mail: gyshao@mail.xjtu.edu.cn ical point (CP) connecting with the chiral crossover separation line.…”

Section: Introductionmentioning

confidence: 99%

Baryon number fluctuations and the phase structure in the PNJL model

et al. 2018

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We investigate the kurtosis and skewness of netbaryon number fluctuations in the Polyakov loop extended Nambu-Jona-Lasinio (PNJL) model, and discuss the relations between fluctuation distributions and the phase structure of quark-gluon matter. The calculation shows that the traces of chiral and deconfinement transitions can be effectively reflected by the kurtosis and skewness of net-baryon number fluctuations not only in the critical region but also in the crossover region. The contour plot of baryon number kurtosis derived in the PNJL model can qualitatively explain the behavior of net-proton number kurtosis in the STAR beam energy scan experiments. Moreover, the three-dimensional presentations of the kurtosis and skewness in this study are helpful to understand the relations between baryon number fluctuations and QCD phase structure.

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Phase diagram and thermal properties of strong-interaction matter

Cited by 72 publications

References 70 publications

QCD phase structure at finite temperature and density

QCD phase structure at finite temperature and density

Dense two-color QCD from Dyson-Schwinger equations

Baryon number fluctuations and the phase structure in the PNJL model

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