Searching for Heavy Neutral Leptons with Displaced Vertices at the LHC

Abstract

Heavy Neutral Leptons are naturally present in many well-motivated extensions of the Standard Model. If their mass is of few dozens of GeVs, they can be long-lived and lead to events with displaced vertices, giving rise to promising signatures due to the low background. We revisit the opportunities offered by the LHC to discover these long-lived states via searches with displaced vertices. We study in particular the implication on the parameter space sensitivity when all mixings to active flavors are taken into account.

arXiv comment5 pages, 2 figures. Proceedings from PIC2018: XXXVIII International Symposium on Physics in Collision, Bogotá, Colombia, 2018. Based on arXiv:1807.10024 and arXiv:1808.04705

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