First-order phase transition from hypernuclear matter to deconfined quark matter obeying new constraints from compact star observations

Shahrbaf, Mahboubeh; Blaschke, D.; Grunfeld, A. G.; Moshfegh, H. R.

doi:10.1103/physrevc.101.025807

Cited by 50 publications

(44 citation statements)

References 78 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Systems with isospin and chiral imbalance are completely different systems and it is remarkable that some phenomena in these systems are entirely equivalent. Additionally, one can notice that the dualities D M and D ∆ are themselves dual to each other with respect to the D duality (10). So one can conclude that there exists only one independent additional duality and one can get the other duality by making use of the main duality (10).…”

Section: Other Dualitiesmentioning

confidence: 94%

“…However, one can show dynamically (at least in the framework of NJL model) that pions do not condense in the system with just chiral or chiral isospin imbalance and the condition of zero pion condensate holds in this case. So we can use the dualities (18), (10) and argue that (µ 5 , T) and (µ I /2, T) phase diagrams are dual to each other if one performs the transformation PC ↔ CSB. Thus one can use the duality to get the critical temperature of chiral symmetry breaking phase as a function of chiral chemical potential T c (µ 5 ) from the phase structure at µ I .…”

Section: Predicting the Catalysis Of Chiral Symmetry Breakingmentioning

confidence: 99%

“…Finite baryon density QCD has piqued huge interest in nuclear physics, high energy physics and even astrophysics. It is excepted that QCD has a very rich phase structure in (T, µ) parameter space [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18], and there are several heavy-ion collision experiments such as NICA, FAIR, RHIC (BES II), J-PARC, HIAF that will elucidate the properties of dense QCD matter in the near future. Especially awaited is the NICA (Nuclotron-based Ion Collider fAility) complex that is now under construction at the Joint Institute for Nuclear Research (Dubna, Russia) [19].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Dense Baryonic Matter and Applications of QCD Phase Diagram Dualities

2020

View full text Add to dashboard Cite

Recently it has been found that quantum chromodynamics (QCD) phase diagram possesses a duality between chiral symmetry breaking and pion condensation. For the first time this was revealed in the QCD motivated toy model. Then it was demonstrated in effective models as well and new additional dualities being found. We briefly recap the main features of this story and then discuss its applications as a tool to explore the QCD phase structure. The most appealing application is the possibility of getting the results on the QCD phase diagram at large baryon density. Taking the idea from large 1/Nc universalities it was argued that the scenario of circumventing the sign problem with the help of dualities seems plausible. It is also discussed that there is a persistent problem about whether there should be catalysis or anti-catalysis of chiral symmetry breaking by chiral imbalance. One can probably say that the issue is settled after lattice results (first principle approach), where the catalysis was observed. But they used an unphysically large pion mass so it is still interesting to get additional indications that this is the case. It is shown just by the duality property that there exists catalysis of chiral symmetry breaking. So, having in mind our results and the earlier lattice simulations, one can probably claim that this issue is settled. It is demonstrated that the duality can be used to obtain new results. As an example, it is showcased how the phase structure of dense quark matter with chiral imbalance (with possibility of inhomogeneous phases) can be obtained from the knowledge of a QCD phase diagram with isopin asymmetry.

show abstract

Section: Other Dualitiesmentioning

confidence: 94%

Section: Predicting the Catalysis Of Chiral Symmetry Breakingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Dense Baryonic Matter and Applications of QCD Phase Diagram Dualities

2020

View full text Add to dashboard Cite

show abstract

“…David has been successfully using quark models all over his career, including applications to dense matter where the otherwise usually confined quarks may be de-confined and give rise to stars with a quark core [1,2]. In this talk we focus on other aspects of chiral quark models, such as the Nambu-Jona-Lasinio (NJL) model, applied to the domain where they were originally designed for, namely the soft limit in the vacuum.…”

Section: Introductionmentioning

confidence: 99%

Applications of the Nambu–Jona-Lasinio model to the partonic structure of the pion

Broniówski

Arriola

2020

Eur. Phys. J. Spec. Top.

View full text Add to dashboard Cite

show abstract

“…This provokes a larger jump in n s from the previous transition, and moves it towards lower chemical potentials. In summary, decreasing the vector interaction causes the transition to superconducting matter to occur at lower chemical potentials, but at the cost of deconfining more s quarks.The fact that the color superconducting phase occurs before or after the decoupling of the s quark from its chiral condensate is currently a matter of debate[101], and as we have just seen it strongly depends on the model parameters used. Furthermore, changing the diquarks coupling ζ D = G D G S also competes by moving the phase transition to higher (or lower) chemical potentials.…”

mentioning

confidence: 96%

Non-local quark models for description of dense matter in the cores of neutron stars

Malfatti¹

View full text Add to dashboard Cite

This thesis work focuses on studying the possible existence of phase transitions in the immediate compact remnants of core collapse supernova, neutron stars, and the theoretical models that describe the interior of dense matter. Specifically, we are interested in analyzing the feasibility of a transition from hadronic matter to quark matter in the cores of these objects. The density of matter inside neutron stars is several times that of atomic nuclei, and the equation of state that describes such matter in such a regime is still unknown. In this context, it is known that the interaction between the constituents of nucleons, the quarks, weakens with increasing density due to the intrinsic property of the QCD known as it asymptotic freedom. Therefore, matter should either dissolve into a quark-free state at high densities, or else form a superconduct- ing state of color. This superconducting phase of color would be energetically favorable, if it were present in a cold neutron star, since a system of fermions that interact weakly at low temperature is unstable with respect to the formation of Cooper pairs. Although it is impossible to know both theoretically and experimentally whether these phases exist in neutron stars, the interpolation of the resolvable part of QCD at high densities, together with the hadronic equations of state at low densities, suggest that they could appear in the interior of compact objects. For the phase transition we will use two different formalisms: the Maxwell formalism, in which an abrupt phase transition between hadronic and quark matter without mixed phase formation is assumed, and the Gibbs formalism, in which a mixed phase in which hadrons and quarks coexist. For the description of hadronic matter, we will use different parametrizations of the relativistic mean field model with density-dependent coupling constants. For the description of quark matter we will use an effective nonlocal Nambu Jona-Lasinio model of three flavors with vector interactions, in which we will include the possibility of formation of diquarks to model a superconducting phase of color in SU (3), which we will call 2SC + s. Phase diagrams and equations of state of quark matter at finite temperature are presented, and the influence of that kind of matter on observables associated with neutron stars is investigated. Likewise, using hybrid equations of state, the simplified thermal evolution of compact stars during their formation is studied, from their state of proto-neutron stars to that of cold neutron stars, and the results obtained are compared with recent astrophysical observations. The pa- rameterizations used in this work are adjusted to the most recent measurements of masses and coupling constants of the QCD, which imposes strong restrictions on the existence of quark matter in proto-stars, unlike what happens with less realistic models or with more free parameters. However, the results obtained indicate that even considering these restrictions, the occurrence of quark matter in the nuclei of these stars remains a promis- ing possibility. The remaining free parameters of the models were adjusted taking into account the observational restrictions, coming from precise determinations of the pulsars masses of ∼ 2 M⊙, and the event corresponding to the fusion of two neutron stars, known as GW170817. The fact that the use of more realistic models for the description of the dense matter in these objects indicates the presence of quark matter inside neutron stars, could be an answer to the question of the behavior of that kind of matter and the determination of its corresponding equation of state.

show abstract

First-order phase transition from hypernuclear matter to deconfined quark matter obeying new constraints from compact star observations

Cited by 50 publications

References 78 publications

Dense Baryonic Matter and Applications of QCD Phase Diagram Dualities

Dense Baryonic Matter and Applications of QCD Phase Diagram Dualities

Applications of the Nambu–Jona-Lasinio model to the partonic structure of the pion

Non-local quark models for description of dense matter in the cores of neutron stars

Contact Info

Product

Resources

About