Dense Baryonic Matter and Strangeness in Neutron Stars

Weise, W.

doi:10.7566/jpscp.26.011002

Cited by 9 publications

(7 citation statements)

References 51 publications

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“…For example, in chiral effective field theory, which takes into account only hadron degrees-of-freedom and repulsive 3-body ΛNN interactions, the hyperon chemical potential is kept above the neutron chemical potential up to densities of about 5 ρ 0 . In this scenario, the weak decay of neutrons into hyperons and, hence, the softening of the EOS is prevented, and neutron stars are stabilized up to 2 solar masses [45]. In conclusion, the future heavy-ion collision experiments at FAIR and NICA will provide important new information on hypernuclei and on our understanding of neutron stars.…”

Section: Exploring the Strange Dimension Of The Nuclear Chartmentioning

confidence: 94%

Heavy-Ion Collisions at FAIR-NICA Energies

Senger

2021

Particles

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The “Facility for Antiproton and Ion Research” (FAIR) in Darmstadt, Germany, and the “Nuclotron-based Ion Collider Facility” (NICA) in Dubna, Russia, are two accelerator centers under construction. FAIR will provide beams and experimental setups to perform forefront research in hadron, nuclear, atomic, and plasma physics, as well as in radiation biology and material science. At NICA, a unique research program on nuclear matter and spin physics will be conducted. Both facilities will execute experiments to explore the properties of QCD matter at neutron star core densities, in order to study the high-density equation of state, and to shed light on the quark degrees-of-freedom emerging in QCD matter at high densities. The research programs will be performed at FAIR with the CBM experiment, and at NICA with the MPD setup at the collider, and with the BM@N experiment at the Nuclotron. These three experiments are complementary, with respect to the beam energy. The physics programs and the relevant experimental observables will be discussed.

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Section: Exploring the Strange Dimension Of The Nuclear Chartmentioning

confidence: 94%

Heavy-Ion Collisions at FAIR-NICA Energies

Senger

2021

Particles

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“…The model takes into account 3-body forces to prevent a strong softening of the EOS, and is able to explain neutron stars with more than two solar masses, with a central density of up to 6 ρ 0 . Calculations based on chiral effective field theory predict no hyperon contributions up to densities of 3-4 ρ 0 when taking into account a repulsive ΛN potential at high density, and shift the appearance of hyperons to densities beyond 5 ρ 0 when including repulsive 3-body ΛNN interactions [37].…”

Section: Exploring the Role Of Hyperons In Dense Nuclear Mattermentioning

confidence: 97%

Exploring Cosmic Matter in the Laboratory—The Compressed Baryonic Matter Experiment at FAIR

Senger

2019

Particles

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The Compressed Baryonic Matter (CBM) experiment is one of four scientific pillars of the future Facility for Antiproton and Ion Research (FAIR) in Darmstadt. In collisions between heavy nuclei at FAIR energies, it is expected that the matter in the reaction zone is compressed to more than five times saturation density, corresponding to the density in the core of a massive neutron star. This offers the unique opportunity to study in the laboratory the high-density equation-of-state (EOS) of nuclear matter, and to search for new phases of Quantum Chromo Dynamics (QCD) matter at large baryon-chemical potentials. Promising experimental observables sensitive to the EOS and to possible phase transitions will be discussed, together with a brief description of the CBM experiment.

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“…If this process occurs at densities, which are realized in neutron stars, it prevents the existence of massive neutron stars, which, however, have been observed. This "hyperon puzzle" can be resolved by the introduction of repulsive ΛN, ΛNN, and ΛΛN interactions, which would shift the condensation of Λ hyperons to rather high densities, which might not be realized in neutron stars [29]. One possibility, to experimentally prove this scenario in the laboratory, is to study hyperon-nucleon interactions, by measuring the lifetime and binding energy of hypernuclei.…”

Section: Hyperons In Dense Nuclear Mattermentioning

confidence: 99%

The heavy-ion program at the upgraded Baryonic Matter@Nuclotron Experiment at NICA

Senger¹

2022

Proceedings of the International Conference on Critical Point and Onset of Deconfinement — PoS(CPOD2021)

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In the coming years, the Nuclotron at JINR in Dubna will deliver gold beams with energies of up to 3.8A GeV and intensities of up to 2.5•10 6 ions/s. These beams are well suited for experiments devoted to the study of the properties of dense baryonic matter, such as the equationof-state and new microscopic degrees-of-freedom which might emerge at neutron star core densities. The relevant observables in heavy-ion collisions at these energies include the yields and multi-differential distributions of (multi-) strange particles, the collective flow of identified particles, fluctuation of conserved quantities, and hypernuclei. In order to measure these observables in Au+Au collisions with rates of up to 50 kHz, the existing BM@N setup in the Nuclotron target hall will be upgraded with a highly granulated and fast hybrid tracking system, and a forward calorimeter for event plane determination. The BM@N physics program, the detector upgrades, and some results of physics performance studies will be presented.

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Dense Baryonic Matter and Strangeness in Neutron Stars

Cited by 9 publications

References 51 publications

Heavy-Ion Collisions at FAIR-NICA Energies

Heavy-Ion Collisions at FAIR-NICA Energies

Exploring Cosmic Matter in the Laboratory—The Compressed Baryonic Matter Experiment at FAIR

The heavy-ion program at the upgraded Baryonic Matter@Nuclotron Experiment at NICA

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