On the celestial body absorption by 6D black holes

Abstract

It is shown that a drastic modifications of BH properties in the extra dimension presence makes the method of extra‐dimensional BH search by of possible celestial body absorption much more effective and realistic. First, the decrease of Hawking radiation intensity allows to survive till present the extra‐dimensional BHs with masses many orders less that the 4D Hawking mass. Second, the strong extra‐dimensional gravity allows these BHs to decelerate fast and become captured by white dwarfs or other celestial bodies. And third, the same strong gravity makes possible complete white dwarf absorption by these light BHs for the cosmological time. The possibility of white dwarf detection through either the accompanying neutrino burst or a forming Solar‐mass BH allows to set up a constraint on the 6D BH mass fraction at the level of 10−16. This way the 6D gravity in the region of Planck masses from 1 TeV to 1 PeV can be searched for.