29–30 Nov 2022
DESY Hamburg and Zoom
Europe/Berlin timezone

Heavy Neutrinos at Future Lepton Colliders

30 Nov 2022, 09:20
20m
Auditorium

Auditorium

Speaker

Krzysztof Mekala (T (Phenomenology))

Description

Neutrinos are probably the most mysterious particles of the Standard Model. The mass hierarchy and oscillations, as well as the nature of their antiparticles, are currently being studied in experiments around the world. Moreover, in many models of New Physics, baryon asymmetry or dark matter density in the universe are explained by introducing new species of neutrinos. Heavy neutrinos of the Dirac or Majorana nature with masses above the EW scale could be produced at future lepton colliders.

We studied the possibility of observing production and decays of heavy neutrinos into 2j+l final state at future Higgs factories ILC and CLIC, as well as at Muon Collider. The analysis is based on the WHIZARD event generation and fast simulation of the detector response with DELPHES. Dirac and Majorana neutrinos with masses up to 10 TeV are considered. Estimated limits on the production cross sections and on the heavy-light neutrino mixing parameter are compared with the current limits coming from the LHC running at 13 TeV and the expected limits from HL-LHC and future hadron colliders. Obtained results are stricter than other limit estimates published so far.

Primary authors

Aleksander Filip Zarnecki (Faculty of Physics, University of Warsaw) Juergen Reuter (T (Phenomenology)) Krzysztof Mekala (T (Phenomenology))

Presentation materials