A Modern View of the Equation of State in Nuclear and Neutron Star Matter

Burgio, G. F.; Schulze, H.-J.; Vidaña, Isaac; Wei, Jin-Biao

doi:10.3390/sym13030400

Cited by 18 publications

(8 citation statements)

References 115 publications

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“…Similar bounds emerge from various realistic EoS reviewed in Refs. [78,79]. Thus, non of these EoS (as well as various realistic EoS reviewed in Refs.…”

Section: Effects Of Slow N − N Transformation: τ ε > T Umentioning

confidence: 99%

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Neutron-mirror neutron mixing and neutron stars

et al. 2021

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The oscillation of neutron n into mirror neutron $$n'$$ n ′ , its mass degenerate partner from dark mirror sector, can gradually transform the neutron stars into the mixed stars consisting in part of mirror dark matter. In quark stars $$n-n'$$ n - n ′ transitions are suppressed. We study the structure of mixed stars and derive the mass-radius scaling relations between the configurations of purely neutron star and maximally mixed star (MMS) containing equal amounts of ordinary and mirror components. In particular, we show that the MMS masses can be at most $$M^{\mathrm{max}}_{NS}/\sqrt{2}$$ M NS max / 2 , where $$M^\mathrm{max}_{NS}$$ M NS max is a maximum mass of a pure neutron star allowed by a given equation of state. We evaluate $$n-n'$$ n - n ′ transition rate in neutron stars, and show that various astrophysical limits on pulsar properties exclude the transition times in a wide range $$10^{5}\,\text {year}< \tau _\varepsilon < 10^{15}\,\text {year}$$ 10 5 year < τ ε < 10 15 year . For short transition times, $$\tau _\varepsilon < 10^5$$ τ ε < 10 5 year, the different mixed stars of the same mass can have different radii, depending on their age, which possibility can be tested by the NICER measurements. We also discuss subtleties related with the possible existence of mixed quark stars, and possible implications for the gravitational waves from the neutron star mergers and associated electromagnetic signals.

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“…Similar bounds emerge from various realistic EoS reviewed in Refs. [78,79]. Thus, non of these EoS (as well as various realistic EoS reviewed in Refs.…”

Section: Effects Of Slow N − N Transformation: τ ε > T Umentioning

confidence: 99%

“…Thus, non of these EoS (as well as various realistic EoS reviewed in Refs. [78,79]) can afford the existence of the MMS with M > 1.8 M or so.…”

Section: Effects Of Slow N − N Transformation: τ ε > T Umentioning

confidence: 99%

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Neutron-mirror neutron mixing and neutron stars

et al. 2021

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“…This experiment pioneered subthreshold strangeness production in heavy-ion collisions and provided a data set which allowed the extraction of information on the high-density EOS of symmetric nuclear matter and on the in-medium modifications of particles. The KaoS data, together with the flow data of FOPI, still represent the benchmarks for transport models used for the extraction of the EOS up to densities of 2 ρ 0 [31].…”

Section: Introductionmentioning

confidence: 99%

Pioneering the Equation of State of Dense Nuclear Matter with Strange Particles Emitted in Heavy-Ion Collisions: The KaoS Experiment at GSI

Senger

2022

Particles

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High-energy heavy-ion collisions offer the unique possibility to study fundamental properties of nuclear matter in the laboratory, which are relevant for our understanding of the structure of compact stellar objects and the dynamics of neutron star mergers. Of particular interest are the nuclear matter equation of state (EOS), the in-medium modifications of hadrons and the degrees of freedom of matter at high densities and temperatures. Pioneering experiments exploring the EOS for symmetric matter were performed at the SIS18 accelerator of GSI, measuring, as function of beam energy, the collective flow of protons and of light fragments and subthreshold strangeness production. These data were reproduced by various microscopic transport model calculations, providing, up to date, the best constraint for the EOS of symmetric matter with an incompressibility of about 200 MeV for densities up to twice the saturation density. This article reviews the experimental results on subthreshold kaon production together with the theoretical interpretation and gives a brief outlook towards future experiments at higher densities.

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“…Strange quarks are produced at the early stage of the collision of heavy ions. They provide information about the equation of state of the QCD matter in the high baryon density phase where the yield of strange quarks is expected to be comparable with that of light quarks [2,3]. According to hadronic transport models, (multi)-strange hyperons are produced in sequential collisions involving kaons and Λs and, therefore, are sensitive to the density of the hot matter created in the nuclei overlap.…”

Section: Introductionmentioning

confidence: 99%

CBM Performance for Λ Hyperon Directed Flow Measurements in Au + Au Collisions at 12A GeV/c

2021

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We present the current status of the performance studies of Λ hyperon directed flow measurement with the CBM experiment at the future FAIR facility in Darmstadt. Kalman Filter mathematics is used to reconstruct Λ→pπ− weak decay kinematics, while the Particle Finder Simple package is used to optimize criteria for Λ hyperon candidate selection. Directed flow of Λ hyperons is studied as a function of rapidity, transverse momentum and collision centrality. The effects on flow measurement due to non-uniformity of the CBM detector response in the azimuthal angle, transverse momentum and rapidity are corrected using the QnTools analysis framework.

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A Modern View of the Equation of State in Nuclear and Neutron Star Matter

Cited by 18 publications

References 115 publications

Neutron-mirror neutron mixing and neutron stars

Neutron-mirror neutron mixing and neutron stars

Pioneering the Equation of State of Dense Nuclear Matter with Strange Particles Emitted in Heavy-Ion Collisions: The KaoS Experiment at GSI

CBM Performance for Λ Hyperon Directed Flow Measurements in Au + Au Collisions at 12A GeV/c

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