Speaker
Pearl Sandick
(University of Utah)
Description
I’ll discuss precision calculations of dark radiation in the form of gravitons coming from Hawking evaporation of spinning primordial black holes (PBHs) in the early Universe. This calculation incorporates a careful treatment of extended spin distributions of a population of PBHs, the PBH reheating temperature, and the number of relativistic degrees of freedom. Results are compared to constraints on dark radiation from BBN and the CMB, as well as the projected sensitivity of CMB Stage 4 experiments, which will be sensitive to some well-motivated PBH spin distributions.
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Authors
Alexandre Arbey
(Lyon U. & CERN TH)
Pearl Sandick
(University of Utah)
Barmak Shams Es Haghi
(University of Utah)
Jérémy Auffinger
(Université Claude Bernard Lyon 1)
Kuver Sinha
(University of Oklahoma)
