In this thesis, we investigate some non-standard aspects of dark matter in the context of weakly-interacting massive particles. We first study the impact of searches for long-lived particles on dark matter models with two concrete realizations: a simplified model which delivers displaced vertices and an effective one which predicts the existence of bound states similar to R-hadrons. In both cases, we find that non-standard signatures are essential in order to fully exploit the potential of LHC for dark matter searches. We then focus our attention on a non-minimal composite Higgs model which can account for dark matter; the greater complexity of the model with respect to the simplest case allows for thermal production of dark matter with a fine tuning which is significantly lower than in other models. In addition, we find that also non-thermal production is possible.

A journey in dark matter models with non-standard features / Davoli, Alessandro. - (2019 Sep 16).

A journey in dark matter models with non-standard features

Davoli, Alessandro
2019-09-16

Abstract

In this thesis, we investigate some non-standard aspects of dark matter in the context of weakly-interacting massive particles. We first study the impact of searches for long-lived particles on dark matter models with two concrete realizations: a simplified model which delivers displaced vertices and an effective one which predicts the existence of bound states similar to R-hadrons. In both cases, we find that non-standard signatures are essential in order to fully exploit the potential of LHC for dark matter searches. We then focus our attention on a non-minimal composite Higgs model which can account for dark matter; the greater complexity of the model with respect to the simplest case allows for thermal production of dark matter with a fine tuning which is significantly lower than in other models. In addition, we find that also non-thermal production is possible.
De Simone, Andrea
Davoli, Alessandro
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Descrizione: P.h.D. thesis
Tipologia: Tesi
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/20.500.11767/102424
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