Supermassive gravitinos and giant primordial black holes
Supermassive gravitinos and giant primordial black holes
We argue that the stable (color-singlet) supermassive gravitinos proposed in our previous work can serve as seeds for giant primordial black holes. These seeds are hypothesized to start out as tightly bound states of fractionally charged gravitinos in the radiation-dominated era, whose formation is supported by the universally attractive combination …