Searches for heavy neutrinos at a 3 TeV CLIC in fat jet final states

2025/11/04 by Liu, Yao-Bei, Lian, Jing-Wei
Physics and Astronomy · #Particle physics theoretical and experimental studies #Neutrino Physics Research #Astrophysics and Cosmic Phenomena

paper · doi:10.48550/arxiv.2511.02557

Abstract

Heavy Majorana neutrinos (N) are predicted in many models of physics beyond the Standard Model. In this work, we explore the production and detection prospects of TeV-scale heavy neutrinos (m_N \gtrsim 1 TeV) at a future 3 TeV Compact Linear Collider (CLIC). We focus on two distinct decay topologies: (i) N → ℓ^± W^∓ with hadronic W boson decay, leading to a final state with one charged lepton and a hadronic fat-jet J_W; and (ii) N → νh with subsequent Higgs decay h → bb, yielding a Higgs-tagged fat-jet J_h and \slashedE_T. Based on comprehensive detector-level simulations and background analysis, we present both 2σ exclusion limits and 5σ discovery reaches in the m_N-|V_{ℓ N}|² plane. We further extract 95% confidence level upper limits on the mixing parameter |V_{ℓ N}|², and perform a detailed comparison with existing constraints from direct searches at future colliders and indirect global fits. Our findings demonstrate that a 3 TeV CLIC can improve the sensitivity to |V_{ℓ N}|² by about two orders of magnitude compared to the projected reaches of future hadron colliders, while remaining competitive with other CLIC search channels.

Citations

• ArXiv

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