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arXiv · 2212.06678

Probing displaced top quark signature at the LHC Run 3

Jeremy Andrea·Daniel Bloch·Eric Conte·Douja Darej·Robin Ducrocq·Emery Nibigira
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Abstract

In the context of prospective studies for searches of new physics at the LHC Run 3, this paper investigates the relevance of using top quarks produced from new long-lived particles, and detected in the tracker volume of the ATLAS and CMS experiments. Such a signature, referred to as displaced top quarks, leads to final states containing displaced vertices and a high multiplicity of displaced jets and tracks, thanks to the top quark decays. Therefore, it is a possible powerful tool for searching for new long-lived particles. Three simplified models based on supersymmetry are explicitly designed for the study of this signature. They differ according to the nature of the long-lived heavy particle which produces at least one top quark: electrically neutral or charged, coloured or non-coloured long-lived particle. For each model, a wide region of parameter space, consistent with a reasonable number of displaced top quarks decaying in a typical tracker volume has been probed. From this study, promising benchmarks are defined and experimental guidelines are suggested.

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Jeremy Andrea, Daniel Bloch, Eric Conte, Douja Darej, Robin Ducrocq, Emery Nibigira. 2022-12-13. Probing displaced top quark signature at the LHC Run 3. https://doi.org/10.1140/epjc%2Fs10052-023-11470-6

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