Abstract

LOSADA, Marta. A review of accelerator-based searches for Neutral Long-Lived Particles. Rev. acad. colomb. cienc. exact. fis. nat. [online]. 2019, vol.43, n.169, pp.638-645. ISSN 0370-3908.  https://doi.org/10.18257/raccefyn.915.

In this paper we present the current status of searches for neutral long-lived particles. The basic formalism that allows the determination of the number of expected long-lived particles is presented. Heavy neutral leptons can be a type of long-lived particles. The main observational motivations for the existence of heavy neutral lepton is covered as well. A summary of the main results from both collider searches and fixed target/beam dump experiments is presented. The outlook for next generation experiments and their impact on the parameter space of coupling strength and mass of heavy neutral leptons is also discussed.

Keywords : Long-lived particles; collider searches; fixed target meson decays; heavy neutral leptons.

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