Collider Signatures of Near-Continuum Dark Matter

• DOI: 10.48550/arxiv.2306.13009
• Publication Date: 2024-05-17
• Authors: Ferrante, Steven; Lee, Seung; Perelstein, Maxim
• Keywords: High Energy Physics - Phenomenology; High Energy Physics - Phenomenology (hep-ph); Extra Dimensions; Nuclear and particle physics. Atomic energy. Radioactivity; 0103 physical sciences; Models for Dark Matter; FOS: Physical sciences; Dark Matter at Colliders; QC770-798; 01 natural sciences; Specific BSM Phenomenology

Abstract In this paper we study a near-continuum dark matter model, in which dark sector consists of a tower of closely spaced states with weak-scale masses. We construct a five-dimensional model which naturally realizes this spectrum. The dark matter is described by a bulk field, which interacts with the brane-localized Standard Model sector via a Z portal. We then study collider signatures of this model. Near-continuum dark matter states produced in a collider undergo cascade decays, resulting in events with high multiplicity of jets and leptons, large missing energy, and displaced vertices. A custom-built Monte Carlo tool described in this paper allows for detailed simulation of the signal events. We present results of such simulations for the case of electron-positron collisions.