Including multineutron states in supernova equations of state reduces unbound neutron fractions, raises proton chemical potentials, promotes heavier nuclei, and lowers overall free energy in neutron-rich conditions.
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Lattice EFT calculations find no resonance signature in the tetraneutron ground-state energy, only a weak attraction in the dineutron-dineutron phase shift whose confined energy is close to the experimental low-energy peak.
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Impact of Effective Nucleon Mass and Multineutron States on the Equation of State for Core-Collapse Supernovae
Including multineutron states in supernova equations of state reduces unbound neutron fractions, raises proton chemical potentials, promotes heavier nuclei, and lowers overall free energy in neutron-rich conditions.
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Searching for the Tetraneutron Resonance on the Lattice
Lattice EFT calculations find no resonance signature in the tetraneutron ground-state energy, only a weak attraction in the dineutron-dineutron phase shift whose confined energy is close to the experimental low-energy peak.