Year: 2025
Type: article
Abstract: A bstract We present a comprehensive and gauge-invariant study of the neutrino dipole portal at the energy frontier. Assuming negligible active-sterile mixing, we analyze sterile neutrino production via dimension-6 dipole operators coupling to the electroweak field strengths. The analysis incorporates both single- and double-gauge-boson effective interactions. We investigate novel collider signatures at the HL-LHC, the FCC-hh — studied here in this context for the first time — and a 10 TeV muon collider. Particular emphasis is placed on electroweak boson-initiated processes, which dominate in the high-mass regime above ~1 TeV. At the muon collider, these VBF-like topologies enable production even when the dipole couples to non-muonic flavors, offering a unique and sensitive probe for different flavor scenarios. We derive sensitivity projections for various theoretical benchmarks, reaching dipole couplings down to d γ ~ 6 × 10 − 7 GeV − 1 at FCC-hh and d γ ~ 2 × 10 − 7 GeV − 1 at the muon collider.
Source: Journal of High Energy Physics
Author: Natascia Vignaroli
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: diamond
Funders: European Commission, NextGenerationEU
Awards: G2372493982, G5356239126
OpenAlex ID: W4415243256