Probing TeV-scale Majorana neutrinos at a muon-proton collider via a lepton-number-violating fat-jet signature
Year: 2026
Type: article
Abstract: We investigate the sensitivity to TeV-scale heavy Majorana neutrinos at a future muon-proton collider with $$\sqrt{s}=5.3$$ s = 5.3 TeV, based on 1 TeV muon and 7 TeV proton beams. We focus on the lepton-number-violating (LNV) process $$\mu ^- p \rightarrow jN$$ μ - p → j N , followed by $$N\rightarrow \mu ^+W^-\rightarrow \mu ^+J$$ N → μ + W - → μ + J , leading to the characteristic final state $$j\mu ^+J$$ j μ + J . Here, j denotes the associated light jet from heavy-neutrino production, while J denotes the fat jet originating from the hadronic d ecay of the highly boosted W boson. This topology provides a clean experimental signature with strongly suppressed Standard Model backgrounds. A comprehensive signal and background analysis is performed using parton showering, fast detector simulation, and dedicated fat-jet reconstruction. We derive the projected $$2\sigma $$ 2 σ exclusion limits on the muon-flavor mixing parameter $$|V_{\mu N}|^2$$ | V μ N | 2 for integrated luminosities of 100 fb $$^{-1}$$ - 1 and 1 ab $$^{-1}$$ - 1 . For heavy-neutrino masses in the range $$1~\textrm{TeV}\le m_N\le 3~\textrm{TeV}$$ 1 TeV ≤ m N ≤ 3 TeV , the projected upper limits on $$|V_{\mu N}|^2$$ | V μ N | 2 range from
Source: The European Physical Journal C
Author: Yao-Bei Liu
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: diamond
Award: G6732158837
OpenAlex ID: W7163665438