Neutron star structure with nuclear force mediated by hypothetical X17 boson

The reported ${17~}$MeV boson - which has been proposed as an explanation to the $^{8}$Be and $^{4}$He anomaly - investigated in the context of its possible influence to the neutron stars structure. Implementing the $m_{v}$=17 MeV to the nuclear equation of state using different incompressibility values K$_{0}$=245 MeV and K$_{0}$=260 MeV and solving the Tolman-Oppenheimer-Volkoff equations, we estimate an upper limit of ${M_{TOV}\leqslant 2.4M\odot}$ for a non rotating neutron star with span in radius ${R}$ between ${11.5~}$km to ${14~}$km. Moving away from the ${\beta}$ - equilibrium with admixture of 10\% protons and simulating possible softening of equation of state due to hyperons, we see that our estimated limits fit quite well inside the newest reported studies, coming from the neutron stars merge procedure.