  The hypothesis that neutrons might decay into dark matter is explored using
neutron stars as a testing ground. It is found that in order to obtain stars
with masses at the upper end of those observed, the dark matter must experience
a relatively strong self-interaction. Conservation of baryon number and energy
then require that the star must undergo some heating, with a decrease in
radius, leading to an increase in speed of rotation over a period of days.

High Energy Physics - Phenomenology;Nuclear Theory