Constraining electroweak and strongly charged long-lived particles with CheckMATE

TL;DR

This paper implements four types of long-lived particle searches in CheckMATE, covering various signatures to explore physics beyond the Standard Model, and analyzes their exclusion potential and overlaps in mass-lifetime space.

Contribution

It introduces new long-lived particle search implementations in CheckMATE, enabling comprehensive analysis of different signatures and their exclusion capabilities.

Findings

Effective exclusion of certain long-lived particles demonstrated.

Significant overlap in sensitivity among different search categories.

Potential to constrain a wide range of new physics models.

Abstract

Long-lived particles have become a new frontier in the exploration of physics beyond the Standard Model. In this paper, we present the implementation of four types of long-lived particle searches, viz. displaced leptons, disappearing track, displaced vertex (together with muons or with missing energy), and heavy charged tracks. These four categories cover the signatures of a large range of physics models. We illustrate their potential for exclusion and discuss their mutual overlaps in mass-lifetime space for two simple phenomenological models involving either a U(1)-charged or a coloured scalar.