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Observing the inflationary reheating

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If you have a question about this talk, please contact Tommaso Giannantonio.

Within inflationary cosmology, the thermal history of the universe starts with the so-called reheating era which smoothly connects the end of inflation to the radiation era. During this epoch the inflaton field decays into unknown states at an unknown rate and with unknown branching ratios; but ultimately producing a plasma of Standard Models particles in thermal equilibrium. In this talk, we show that within many models of inflation the current CMB measurements put non-trivial constraints on various kinematic properties of the reheating era. Conversely, such a result shows that comparing theoretical inflationary models to cosmological observations can no longer be performed without specifying a minimal set of hypothesis on how the reheating proceeded.

This talk is part of the Cosmology Lunch series.

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