Probing TeV-scale Majorana neutrinos at a muon-proton collider via a lepton-number-violating fat-jet signature
Abstract
We investigate the sensitivity to TeV-scale heavy Majorana neutrinos at a future muon-proton collider with √s=5.3~TeV, based on 1~TeV muon and 7~TeV proton beams. We focus on the lepton-number-violating (LNV) process μ- p → jN, followed by N→μ+W-→μ+J, leading to the characteristic final state jμ+J. Here, j denotes the associated light jet from heavy-neutrino production, while J denotes the fat jet originating from the hadronic decay 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 2σ exclusion limits on the muon-flavor mixing parameter |VμN|2 for integrated luminosities of $100fb^{-1}$ and $1ab^{-1}$. For heavy-neutrino masses in the range 1 TeV≤ mN≤3 TeV, the projected upper limits on |VμN|2 range from 2.6×10−6 to 5.9×10−5 at $1ab^{-1}$. These results show that a future μp collider can provide competitive and complementary sensitivity to TeV-scale heavy Majorana neutrinos compared with other proposed high-energy facilities.
Related
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BibTeX
@misc{liu2026probing,
title = {{Probing TeV-scale Majorana neutrinos at a muon-proton collider via a lepton-number-violating fat-jet signature}},
author = {Yao-Bei Liu},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2606.05962},
eprint = {2606.05962},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2606.05962},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Probing TeV-scale Majorana neutrinos at a muon-proton collider via a lepton-number-violating fat-jet signature
AU - Yao-Bei Liu
PY - 2026
DA - 2026/09/26
PB - arXiv
DO - 10.48550/arxiv.2606.05962
UR - https://arxiv.org/abs/2606.05962
AB - We investigate the sensitivity to TeV-scale heavy Majorana neutrinos at a future muon-proton collider with √s=5.3~TeV, based on 1~TeV muon and 7~TeV proton beams. We focus on the lepton-number-violating (LNV) process μ^- p → jN, followed by N→μ^+W^-→μ^+J, leading to the characteristic final state jμ^+J. Here, j denotes the associated light jet from heavy-neutrino production, while J denotes the fat jet originating from the hadronic decay 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 2σ exclusion limits on the muon-flavor mixing parameter |V_μN|^2 for integrated luminosities of $100fb^{-1}$ and $1ab^{-1}$. For heavy-neutrino masses in the range 1 TeV≤ m_N≤3 TeV, the projected upper limits on |V_μN|^2 range from 2.6×10^−6 to 5.9×10^−5 at $1ab^{-1}$. These results show that a future μp collider can provide competitive and complementary sensitivity to TeV-scale heavy Majorana neutrinos compared with other proposed high-energy facilities.
ER -