PT Journal
AU Cottin, G
   Helo, JC
   Hirsch, M
   Pena, C
   Wang, CSA
   Xie, S
TI Long-lived heavy neutral leptons with a displaced shower signature at CMS
SO Journal of High Energy Physics
JI J. High Energy Phys.
PY 2023
BP 011
EP 16pp
VL 02
IS 2
DI 10.1007/JHEP02(2023)011
LA English
DE New Light Particles; Sterile or Heavy Neutrinos
AB 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.
ER