Impact of dineutrons on nuclear compositions of a core-collapse supernova

Abstract

We study the nuclear compositions in the central region of a core-collapse supernova, assuming the existence of dineutrons (${}^{2}n$) and tetraneutrons (${}^{4}n$). At 100~ms after core bounce, ${}^{2}n$ and ${}^{4}n$ are more abundant than deuterons within radii of approximately 100 and 50~km, respectively. Compared to the model ignoring the existence of ${}^{2}n$ and ${}^{4}n$, the mass fraction of neutrons up to a radius of 100~km reduces, while the mass fractions of protons, deuterons, and ${}^4\mathrm{He}$ increase. Due to the uncertainties in the properties of ${}^{2}n$ and ${}^{4}n$, we investigate the influence of their binding energies on the nuclear composition. We find the binding energy of ${}^{2}n$ has only a modest effect on the overall composition, except for its own mass fraction, while that of ${}^{4}n$ has a negligible impact.

arXiv comment6 pages, 9 figures, accepted for publication in Phys. Rev. C. Revised version with shortened content and updated title

References in corpus (21)

• Composition and thermodynamics of nuclear matter with light clusters
• Nuclear weak-interaction processes in stars
• The detection of neutron clusters
• Neutrino Reactions on Deuteron
• A Second Relativistic Mean Field and Virial Equation of State for Astrophysical Simulations
• Appearance of Light Clusters in Post-bounce Evolution of Core-Collapse Supernovae
• Effects of symmetry energy on equation of state for simulations of core-collapse supernovae and neutron-star mergers
• Nuclear matter equation of state including few-nucleon correlations $(A\le 4)$
• Possible early linear acceleration of proto-neutron stars via asymmetric neutrino emission in core-collapse supernovae
• The influence of inelastic neutrino reactions with light nuclei on the standing accretion shock instability in core-collapse supernovae
• The quest for light multineutron systems
• Inelastic Neutrino-Helium Scatterings and Standing Accretion Shock Instability in Core-Collapse Supernovae
• The Effect of Bound Dineutrons upon BBN
• Constraints on a possible dineutron state from pionless EFT
• Expected impact from weak reactions with light nuclei in core-collapse supernova simulations
• Medium modifications for light and heavy nuclear clusters in simulations of core collapse supernovae -- Impact on equation of state and weak interactions
• Big Bang Nucleosynthesis: The Strong Nuclear Force meets the Weak Anthropic Principle
• Nuclei in Core-Collapse Supernovae Engine
• Tetraneutron condensation in neutron rich matter
• Neutrino Emissivities from Deuteron-Breakup and Formation in Supernovae
• Light Neutral Clusters in Supernova Matter

Cited by in corpus (1)

• Searching for the Tetraneutron Resonance on the Lattice