Earth-mass primordial black hole mergers as sources for nonrepeating fast radio bursts

Fast radio bursts (FRBs) are mysterious astronomical transients with extremely short intrinsic duration. Until now, the physical origins of them still remain elusive especially for non-repeating FRBs. Strongly inspired by recent progress on possible evidence Earth-mass primordial black holes, we revisit model holes mergers as sources Under null hypothesis that observed FRBs originated from analyzed four independent samples to study parameters i.e. typical charge value $q_{\rm{c}}$ and power index $\alpha$ distribution function hole population $\phi(q) \propto (q/q_{\rm{c}})^{-\alpha}$ which describe how was distributed in population. $q$ is unit $\sqrt{G} M$, where $M$ mass hole. It turns out this can explain data well. {Assuming monochromatic spectrum holes}, get average $\bar{q}_{\rm{c}}/10^{-5}=1.59^{+0.08}_{-0.18}$ $\bar{\alpha}=4.53^{+0.21}_{-0.14}$ combining fitting results given FRB samples. The event rate be explained context model, if abundance populations $q \gtrsim 10^{-6}$ larger than $10^{-5}$ far below upper limit current observations holes. In future, simultaneous detection high frequency gravitational waves produced may directly confirm or deny model.