Microscopic Black Holes and Hot Matter

Dr. Ramin G. Daghigh
Department of Chemistry and Physics, Arkansas State University

Abstract:  The relativistic viscous fluid equations describing the outflow of high temperature matter created via Hawking radiation from microscopic black holes are solved numerically for a realistic equation of state.  We focus on black holes with initial temperatures greater than 100 GeV and lifetimes less than 6 days.  The spectra of direct photons and photons from neutral pion decay are calculated for energies greater than 1 GeV. The most promising route for the observation of microscopic black holes is to search for point sources emitting gamma rays of ever-increasing energy.  We also calculate the spectra of all three flavors of neutrinos arising from direct emission from the fluid at the neutrino-sphere and from the decay of pions and muons from their decoupling at much larger radii and smaller temperatures for neutrino energies between 1 GeV and the Planck energy.  The results for neutrino spectra may be applicable for the last few hours and minutes of the lifetime of a microscopic black hole.