Meson properties and phase diagrams in a SU(3) nonlocal PNJL model with lattice-QCD-inspired form factors

Carlomagno, J. P.

doi:10.1103/physrevd.97.094012

Cited by 12 publications

(26 citation statements)

References 55 publications

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“…(23), with T 0 = 210 MeV, we obtain through the corresponding susceptibilities, almost the same chiral and deconfinement critical temperatures T c = 202 MeV (less than 3% of difference), as expected, since at µ = 0 chiral restoration and deconfinement takes place simultaneously as crossover phase transitions. This behavior was verified by lQCD calculations [2], in nlPNJL models [5,17,18] and also obtained by finite energy sum rules [31].…”

Section: Fesr Program At Zero Densitysupporting

confidence: 65%

“…Thus, in the mean field approximation (MFA), and following the same prescriptions as in Refs. [5,16,19], the thermodynamic potential Ω MFA at finite temperature and chemical potential is given by [41]…”

Section: Thermodynamics At Finite Densitymentioning

confidence: 99%

“…At finite temperature, it is usual to take for this potential a functional form based on properties of pure gauge QCD. Among the most used effective potentials, the Ansatz that provides the best agreement with lQCD results [5,18] is the polynomial function based on a Ginzburg-Landau Ansatz [9,43]:…”

Section: Thermodynamics At Finite Densitymentioning

confidence: 99%

“…Therefore, predictions of the transition features at regions that are not accessible through lattice techniques arise from effective theories, like for instance, the nonlocal Polyakov−Nambu−Jona-Lasinio (nlPNJL) models (see Ref. [5] and references therein), where quarks interact through covariant nonlocal chirally symmetric couplings in a background color field. These approaches, which can be considered as an improvement over the local model [6][7][8][9][10][11][12], offer a common framework to study both chiral restoration and deconfinement transitions for hadronic systems at finite temperature and/or chemical potential (see e.g.…”

Section: Introductionmentioning

confidence: 99%

“…Refs. [5,[13][14][15][16][17][18][19]). In fact, the nonlocal character of the interactions arises naturally in the context of several successful approaches to low-energy quark dynamics [20][21][22], and leads to a momentum dependence in the quark propagator that can be made consistent with lQCD results.…”

Section: Introductionmentioning

confidence: 99%

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Comparison between the continuum threshold and the Polyakov loop as deconfinement order parameters

Carlomagno

Loewe

2017

Phys. Rev. D

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We study the relation between the continuum threshold as function of the temperature s0(T ) within finite energy sum rules and the trace of the Polyakov loop Φ in the framework of a nonlocal SU(2) chiral quark model, establishing a contact between both deconfinement order parameters at finite temperature T and chemical potential µ. In our analysis, we also include the order parameter for the chiral symmetry restoration, the chiral quark condensate.We found that s0 and Φ providing us the same information for the deconfinement transition, both for the zero and finite chemical potential cases. At zero density, the critical temperatures for both quantities coincide exactly and, at finite µ both order parameters provide evidence for the appearance of a quarkyonic phase.

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Section: Fesr Program At Zero Densitysupporting

confidence: 65%

Section: Thermodynamics At Finite Densitymentioning

confidence: 99%

Section: Thermodynamics At Finite Densitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Comparison between the continuum threshold and the Polyakov loop as deconfinement order parameters

Carlomagno

Loewe

2017

Phys. Rev. D

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Phase transitions in neutron stars and their links to gravitational waves

Orsaria

Malfatti

Mariani

et al. 2019

J. Phys. G: Nucl. Part. Phys.

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The recent direct observation of gravitational wave event GW 170817 and its GRB170817A signal has opened up a new window to study neutron stars and heralds a new era of Astronomy referred to as the Multimessenger Astronomy. Both gravitational and electromagnetic waves from a single astrophysical source have been detected for the first time. This combined detection offers an unprecedented opportunity to place constraints on the neutron star matter equation of state. The existence of a possible hadron-quark phase transition in the central regions of neutron stars is associated with the appearance of g-modes, which are extremely important as they could signal the presence of a pure quark matter core in the centers of neutron stars. Observations of g-modes with frequencies between 1 kHz and 1.5 kHz could be interpreted as evidence of a sharp hadron-quark phase transition in the cores of neutron stars. In this article, we shall review the description of the dense matter composing neutron stars, the determination of the equation of state of such matter, and the constraints imposed by astrophysical observations of these fascinating compact objects. arXiv:1907.04654v1 [astro-ph.HE]

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Hot quark matter and (proto-) neutron stars

et al. 2019

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In part one of this paper, we use a non-local extension of the 3-flavor Polyakov-Nambu-Jona-Lasinio model, which takes into account flavor-mixing, momentum dependent quark masses, and vector interactions among quarks, to investigate the possible existence of a spinodal region (determined by the vanishing of the speed of sound) in the QCD phase diagram and determine the temperature and chemical potential of the critical end point. In part two of the paper, we investigate the quark-hadron composition of baryonic matter at zero as well as non-zero temperature. This is of great topical interest for the analysis and interpretation of neutron star merger events such as GW170817. With this in mind, we determine the composition of proto-neutron star matter for entropies and lepton fractions that are typical of such matter. These compositions are used to delineate the evolution of proto-neutron stars to neutron stars in the baryon-mass versus gravitational-mass diagram. The hot stellar models turn out to contain significant fractions of hyperons and ∆-isobars but no deconfined quarks. The latter, are found to exist only in cold neutron stars. I. INTRODUCTIONExploring the thermodynamic behavior of the quark-gluon plasma and its associated equation of state (EoS) has become one of the forefront areas of modern physics. The properties of such matter are being probed with the Relativistic Heavy Ion Collider (RHIC) at BNL and the Large Hadron Collider (LHC) at CERN, and great advances in our understanding of such matter are expected from the next generation of high density experiments at the Facility for Antiproton and Ion Research (FAIR at GSI) [1, 2], the Nuclotron-bases Ion Collider fAcility (NICA at JINR) [3, 4], the Japan Proton Accelerator Research Complex (J-PARC at Tokai campus of JAEA) [5], the Super Proton Synchrotron (SPS at CERN) [6] and the Beam Energy Scan (BES at BNL) [7].Depending on temperature T , and baryon chemical potential µ, the deconfined phase of quarks and gluons is believed to exist at two extreme regions in the phase diagram of quantum chromodynamics (QCD). The first regime corresponds to T >> µ, which was the case in the early Universe where the temperature was hundreds of MeV but the net baryon number density was very low. Secondly, it is theorized that quark deconfinement occurs also at low temperatures but very high chemical potential, T << µ, that is, at conditions which exist in the inner cores of (proto-) neutron stars [8]. Portions of the phase diagram lying between these two extreme physical regimes can be probed with relativistic collision experiments.Effective field-theoretical models such as the Nambu-Jona-Lasinio model and its extensions [9-13] as well as lattice QCD (LQCD) calculations [14-16] predict a smooth crossover of nuclear matter to quark matter in the low density but high temperature regime of the phase diagram. On the other hand, in the low temperature but high chemical potential regime the hadron-quark phase transition is likely be of first-order [17]. Some recent works [18,...

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Meson properties and phase diagrams in a SU(3) nonlocal PNJL model with lattice-QCD-inspired form factors

Cited by 12 publications

References 55 publications

Comparison between the continuum threshold and the Polyakov loop as deconfinement order parameters

Comparison between the continuum threshold and the Polyakov loop as deconfinement order parameters

Phase transitions in neutron stars and their links to gravitational waves

Hot quark matter and (proto-) neutron stars

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