Quarkyonic stars with isospin-flavor asymmetry

Margueron, J.; Hansen, H.; Proust, P.; Chanfray, G.

doi:10.48550/arxiv.2103.10209

Cited by 8 publications

(18 citation statements)

References 30 publications

(72 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Following their study, extensions have been proposed to incorporate beta-equilibrium by Refs. [14,15], and here we follow the proposal of Ref. [15].…”

mentioning

confidence: 95%

“…The purpose of the present work is to address this question and explore the consequences of the onset of a first-order phase transition to an exotic state of matter. We also confront it to the predictions of the recent quarkyonic model [10,11,12,13,14,15].…”

mentioning

confidence: 99%

“…The softening of the EoS associated to a FOPT is contrasted by the quarkyonic model (QycM) recently applied to compact stars [10,11,12,13,14,15]. The multi-component momentum space shell-structure of the QycM results in a rapid increase in pressure as a function of n upon the onset of quarks.…”

mentioning

confidence: 99%

“…Note that, under the assumption that chiral symmetry remains broken, we take M Q = M N /N c even in the quarkyonic matter. Having thus established the EoS of quarkyonic matter for arbitrary isospin asymmetries, the condition of beta-equilibrium can now be trivially imposed [15]. Results (a).-In Fig.…”

mentioning

confidence: 99%

See 3 more Smart Citations

Impact of massive neutron star radii on the nature of phase transitions in dense matter

Somasundaram,

Margueron

2021

Preprint

View full text Add to dashboard Cite

The last few years have seen tremendous progress in the observation of the global properties of neutron stars (NSs), e.g. masses, radii and tidal deformabilities. Such properties provide information about possible phase transitions in the inner cores of NSs, provided the connection between observed masses and radii and the equation of state (EoS) is well understood. We focus the present study on first-order phase transitions, which often softens the EoS and consequently reduces the maximum mass as well as the radii of NSs. Here, we challenge this conventional expectation by constructing explicit examples of EoSs undergoing a first-order phase transition, but which are much stiffer that their purely hadronic counterparts. We also provide comparisons with the recently proposed quarkyonic EoS which suggests a strong repulsion in the core of NSs, and we show that their stiffness can be realistically masqueraded by first-order phase transitions to exotic matter.

show abstract

“…Following their study, extensions have been proposed to incorporate beta-equilibrium by Refs. [14,15], and here we follow the proposal of Ref. [15].…”

mentioning

confidence: 95%

mentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

Impact of massive neutron star radii on the nature of phase transitions in dense matter

Somasundaram,

Margueron

2021

Preprint

View full text Add to dashboard Cite

show abstract

“…Remarkably, these baryons are relativistic at relatively low density, n B = 1 − 4n 0 ∼ Λ 3 QCD , much smaller than naive baryon gas estimates, n B ∼ 100n 0 ∼ P 3 B ∼ (N c Λ QCD ) 3 . Including this feature leads to the peak in speed of sound around n B = 1 − 4n 0 [67,[79][80][81][82][83][84].…”

Section: Introductionmentioning

confidence: 99%

Peaks of sound velocity in two color dense QCD: quark saturation effects and semishort range correlations

Kojo,

Suenaga

2021

Preprint

View full text Add to dashboard Cite

We discuss stiffening of dense matter in two color QCD (QC2D) where hadrons are mesons and diquark baryons. We study two models which describe a transition of matter from the Bose-Einstein-Condensation regime at low density to the Bardeen-Cooper-Schrieffer regime at high density. The first model is based on coherent states of diquarks, and the second is the Nambu-Jona-Lasinio model with diquark pairing terms. We particularly focus on how quark states are occupied as baryon density increases. We find that, due to the occupied quark levels, the ideal gas picture of diquarks breaks down at density significantly less than the density where baryon cores overlap. The saturation of quark states at low momenta stiffens equations of state. We also study the effects of interactions which depend on the quark occupation probability. We argue that equations of state become very stiff when the bulk part of the quark Fermi sea has the effective repulsion but the Fermi surface enjoys the attractive correlations. This disparity for different momentum domains is possible due to the strong channel dependence in gluon exchanges with momentum transfer of 0.2 − 1 GeV. These concepts can be transferred from QC2D to QCD in any numbers of colors.

show abstract

The sound speed and core of massive compact stars: A manifestation of hadron-quark duality

Ma,

Rho

2021

Preprint

View full text Add to dashboard Cite

Quarkyonic stars with isospin-flavor asymmetry

Cited by 8 publications

References 30 publications

Impact of massive neutron star radii on the nature of phase transitions in dense matter

Impact of massive neutron star radii on the nature of phase transitions in dense matter

Peaks of sound velocity in two color dense QCD: quark saturation effects and semishort range correlations

The sound speed and core of massive compact stars: A manifestation of hadron-quark duality

Contact Info

Product

Resources

About