A High-Energy Neutrino Collider within a Muon Collider
Abstract
A multi-TeV muon collider is simultaneously a collider for high-energy neutrinos. The radiation of soft W± gauge bosons from the muon beams gives rise to collisions of μ+ν, μ-ν̅ and νν̅ at center-of-mass energies close to that of the μ+μ- collisions in a controlled and theoretically predictable setting. We focus on the leading partonic processes μ+μ- → ℓ+ℓ'-, νμμ+→ νℓ ℓ'+, ν̅μμ- → ν̅ℓ ℓ'- and νμν̅μ→ ℓ+ℓ'- (ℓ, ℓ'=e, μ, τ). These are related to one another at high energies by the electroweak SU(2) gauge symmetry, and therefore probe different components of the same underlying electroweak dynamics. These processes open qualitatively new windows to neutrino interactions at unprecedented energies, and open new windows on physics beyond the Standard Model. We demonstrate the combined sensitivity and the complementarity of the different purely-leptonic collisions using both effective field theory and simplified models of W'± and Z' vector bosons. The radiative return mechanism leads to resonant production of the W′± and Z' vector bosons when their masses are kinematically accessible, while their off-shell effects are captured by the corresponding effective operators. In particular, we show that supplementing the dominant charged-lepton collisions with neutrino-initiated collisions significantly improves the ability to resolve degeneracies among different effective operators, even for operators to which the neutrino-initiated processes are not directly sensitive. Including these channels is therefore essential for properly characterizing the structure of new physics.
Related
- FCC-μe: High Energy, High Luminosity Muon-Electron Collider & Neutrino Factory at CERN
- LHμC: A high energy, high luminosity muon-hadron collider at CERN
- Estimating High-Energy Neutrino Effective Areas from Muon Propagation
- Neutrino Tridents and W-boson production at the Muon Collider
- Neutrino trident process at a muon collider
BibTeX
@misc{bigaran2026highenergy,
title = {{A High-Energy Neutrino Collider within a Muon Collider}},
author = {Innes Bigaran and André de Gouvêa and Tao Han and Ian Low and Yang Ma and Zahra Tabrizi and Keping Xie},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.37756},
eprint = {2610.37756},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.37756},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - A High-Energy Neutrino Collider within a Muon Collider
AU - Innes Bigaran
AU - André de Gouvêa
AU - Tao Han
AU - Ian Low
AU - Yang Ma
AU - Zahra Tabrizi
AU - Keping Xie
PY - 2026
DA - 2026/10/27
PB - arXiv
DO - 10.48550/arxiv.2610.37756
UR - https://arxiv.org/abs/2610.37756
AB - A multi-TeV muon collider is simultaneously a collider for high-energy neutrinos. The radiation of soft W^± gauge bosons from the muon beams gives rise to collisions of μ^+ν, μ^-ν̅ and νν̅ at center-of-mass energies close to that of the μ^+μ^- collisions in a controlled and theoretically predictable setting. We focus on the leading partonic processes μ^+μ^- → ℓ^+ℓ'^-, ν_μμ^+→ ν_ℓ ℓ'^+, ν̅_μμ^- → ν̅_ℓ ℓ'^- and ν_μν̅_μ→ ℓ^+ℓ'^- (ℓ, ℓ'=e, μ, τ). These are related to one another at high energies by the electroweak SU(2) gauge symmetry, and therefore probe different components of the same underlying electroweak dynamics. These processes open qualitatively new windows to neutrino interactions at unprecedented energies, and open new windows on physics beyond the Standard Model. We demonstrate the combined sensitivity and the complementarity of the different purely-leptonic collisions using both effective field theory and simplified models of W'^± and Z' vector bosons. The radiative return mechanism leads to resonant production of the W^′± and Z' vector bosons when their masses are kinematically accessible, while their off-shell effects are captured by the corresponding effective operators. In particular, we show that supplementing the dominant charged-lepton collisions with neutrino-initiated collisions significantly improves the ability to resolve degeneracies among different effective operators, even for operators to which the neutrino-initiated processes are not directly sensitive. Including these channels is therefore essential for properly characterizing the structure of new physics.
ER -