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Venerdì 07 Dicembre 2018 ore 11:00
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Sala Riunioni Terzo piano edificio di via Pascoli
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Simone Biondini - Van Swinderen Institute, University Of Groningen
titoloevento
Bound-state effects on dark matter relic density
abstract
Recently it has been realized that non-perturbative dynamics, including the Sommerfeld effect, bound
state formation/dissociation and thermal masses, play an important role in the determination of the dark
matter relic density. This calls for a careful analysis of thermal freeze-out and a new look at the
experimental signatures expected for a thermal relic. We focus on a simplified model comprising a
Majorana dark matter co-annihilating with a strongly interacting scalar and we make contact with non-
relativistic effective field theories. Here, the dark matter mass that reproduces the observed relic density
increases up to an order of magnitude. Finally, we discuss further applications of this formalism to the Inert
Doublet Model and a U'(1) extension of the Standard Model.

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