A parameter study of beta-stable neutron star matter with neutron dark decay shows the symmetry energy and dark-sector interactions jointly set radii and tidal deformability, keeping the decay scenario compatible with observed masses.
Implications of the recent neutron decay measurements on the properties of compact objects -- a dark star with nucleonic shell ?
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abstract
Recent experimental observation suggests that neutron decay is always accompanied by emission of electron while in 1% of cases proton is not emitted. We develop a scenario kinematically compatible with experimental observation, where neutron decay results in production of two dark matter particles of about half the mass of neutron and test properties of neutron stars with admixture of such particles. Constraints on mass and coupling to vector dark boson are obtained. The structure of the compact object is modified to a dark star with a shell of nucleonic matter around the nuclear saturation density.
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Neutron Dark Decay in Neutron Stars: The Role of the Symmetry Energy
A parameter study of beta-stable neutron star matter with neutron dark decay shows the symmetry energy and dark-sector interactions jointly set radii and tidal deformability, keeping the decay scenario compatible with observed masses.