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Probing neutron-star matter in the lab: similarities and differences between binary mergers and heavy-ion collisions

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arxiv 2201.13150 v2 pith:FIGAMOCK submitted 2022-01-31 nucl-th astro-ph.HEgr-qc

classification nucl-thastro-ph.HEgr-qc
keywords collisionsheavy-ionbinarymattermergersneutron-starcomparisonconditions
verification ladder T0 review T1 audit T2 compute T3 formal

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abstract

Binary neutron-star mergers and heavy-ion collisions are related through the properties of the hot and dense nuclear matter formed during these extreme events. In particular, low-energy heavy-ion collisions offer exciting prospects to recreate such {extreme} conditions in the laboratory. However, it remains unexplored to what degree those collisions can actually reproduce hot and dense matter formed in binary neutron star mergers. As a way to understand similarities and differences between these systems, we {discuss their geometry and }perform a direct numerical comparison of the thermodynamic conditions probed in both collisions. To enable a direct comparison, we employ a finite-temperature equation of state able to describe the entire high-energy phase diagram of Quantum Chromodynamics. Putting side by side the evolution of both systems, we find that laboratory heavy-ion collisions at the energy range of $E_{\mathrm{lab}}=0.4 - 0.6\ A$ MeV probe (thermodynamic) states of matter that are very similar to those created in binary neutron-star mergers. These results can inform future low-energy heavy-ion collisions probing this regime.

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Cited by 6 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Untangling the interplay of the Equation-of-State and the Collision Term towards the generation of Directed and Elliptic Flow at intermediate energies

    nucl-th 2024-11 conditional novelty 7.0 of 10

    In UrQMD simulations of Au+Au at SIS18/SIS100 energies, the final midrapidity elliptic flow is generated late by the mean-field potential during the breakup of a matter bridge, not by early squeeze-out or spectator shadowing.

  2. Post-Merger Gravitational-Wave Uncertainties of Binary Neutron Stars under Multi-Messenger EOS Constraints

    astro-ph.HE 2026-06 unverdicted novelty 6.0 of 10

    With current multi-messenger EOS constraints, the post-merger peak frequency f2,mean is determined to ~100 Hz at fixed mass and tidal deformability/radius, tight enough to expose thermal or phase-transition physics.

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    nucl-th 2025-04 conditional novelty 6.0 of 10

    In UrQMD, both coalescence and statistical fragmentation give mass-number scaling of directed flow for (hyper)nuclei at 3 GeV that matches STAR, while elliptic flow scaling is not seen in the data.

  4. Building Neutron Stars with the MUSES Calculation Engine

    nucl-th 2025-02 conditional novelty 6.0 of 10

    A new open-source calculation engine produces crust-to-core neutron star equations of state and shows that smooth matching choices change predicted radii and masses by several percent.

  5. Simultaneous description of high density QCD matter in heavy ion collisions and neutron star observations

    hep-ph 2025-01 conditional novelty 6.0 of 10

    An equation of state selected to match neutron star mass-radius data also describes HADES heavy-ion observables when implemented with momentum-dependent potentials in UrQMD.

  6. Study on the equation-of-state with light clusters and hypernuclei

    nucl-th 2025-09 conditional novelty 1.0 of 10

    A review of transport-model constraints on the nuclear equation of state from flow of protons, light clusters, and hypernuclei, concluding that soft momentum-dependent potentials fit few-GeV data best.

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