%0 Journal Article
%T Long-lived heavy neutral leptons with a displaced shower signature at CMS
%A Cottin, G.
%A Helo, J. C.
%A Hirsch, M.
%A Pena, C.
%A Wang, C. S. A.
%A Xie, S.
%J Journal of High Energy Physics
%D 2023
%V 02
%N 2
%I Springer
%@ 1029-8479
%G English
%F Cottin_etal2023
%O WOS:000924750700002
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=5474), last updated on Thu, 02 Mar 2023 08:03:08 +0000
%X We study the LHC discovery potential in the search for heavy neutral leptons (HNL) with a new signature: a displaced shower in the CMS muon detector, giving rise to a large cluster of hits forming a displaced shower. A new Delphes module is used to model the CMS detector response for such displaced decays. We reinterpret a dedicated CMS search for neutral long-lived particles decaying in the CMS muon endcap detectors for the minimal HNL scenario. We demonstrate that this new strategy is particularly sensitive to active-sterile mixings with tau leptons, due to hadronic tau decays. HNL masses between similar to 1-6 GeV can be accessed for mixings as low as vertical bar V-tau N vertical bar(2) similar to 10(-7), probing unique regions of parameter space in the tau sector.
%K New Light Particles
%K Sterile or Heavy Neutrinos
%R 10.1007/JHEP02(2023)011
%U https://arxiv.org/abs/2210.17446
%U https://doi.org/10.1007/JHEP02(2023)011
%P 011-16pp