Journal Article/Contribution to a conference proceedings

PUBDB-2025-01994

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Hunting for heavy neutral leptons at future lepton colliders

Mekala, K. (Corresponding author)DESY* ; Reuter, J.DESY* ; Żarnecki, A. F.

2024
SISSA Trieste

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Please use a persistent id in citations: doi:10.22323/1.449.0460  doi:10.3204/PUBDB-2025-01994

Abstract: Neutrinos are the most elusive particles known. Heavier sterile neutrinos mixing with the Standard Model partners might solve the mystery of the baryon asymmetry of the universe and take part in the mass generation mechanism for the light neutrinos. Future lepton colliders, including $e^+e^-$ Higgs factories, as well as multi-TeV electron and muon machines, will provide the farthest search reach for such neutrinos in the mass range from above the Z pole into the multi-TeV regime. In our contribution, we will discuss the future lepton collider search potential for such particles in their prompt decays. We will also present a new approach to constrain the nature of heavy neutrinos, probing their Majorana or Dirac nature, based on the kinematic variable distributions. Finally, we will discuss the complementarity in the flavour-mixing parameter space between the two types of lepton colliders.

Keyword(s): electron positron: annihilation ; electron positron: colliding beams ; neutrino: heavy ; neutrino: sterile ; neutrino: mixing ; baryon: asymmetry ; pole ; kinematics ; mass generation ; Higgs-factory ; neutrino: Majorana ; neutrino: Dirac ; data analysis method ; numerical calculations: Monte Carlo ; proposed experiment

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Contributing Institute(s):

1. Theorie-Gruppe (T)

Research Program(s):

1. 611 - Fundamental Particles and Forces (POF4-611) (POF4-611)
2. DFG project G:(GEPRIS)390833306 - EXC 2121: Quantum Universe (390833306) (390833306)

Experiment(s):

1. No specific instrument

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Database coverage:
; ; ; ; DOAJ Seal ; SCOPUS

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