https://doi.org/10.1140/epjc/s10052-025-14337-0
Letter
Probing a 
gauge boson via neutrino trident scattering in the Forward Physics Facility at the LHC and FCC
1
Instituto de Física Gleb Wataghin-Universidade Estadual de Campinas (UNICAMP), 13083-859, Campinas, SP, Brazil
2
Institute of Physics and Mathematics, Federal University of Pelotas, Postal Code 354, 96010-900, Pelotas, RS, Brazil
3
Escola de Engenharia Industrial Metalúrgica de Volta Redonda, Universidade Federal Fluminense (UFF), CEP 27255-125, Volta Redonda, RJ, Brazil
Received:
25
November
2024
Accepted:
21
May
2025
Published online:
31
May
2025
The study of neutrino physics at the Large Hadron Collider is already a reality, and a broad neutrino physics program is expected to be developed in forthcoming years at the Forward Physics Facility (FPF). In particular, the neutrino trident scattering process, which is a rare Standard Model process, is expected to be observed for the first time with a statistical significance of 
using the FASER
2 detector. Moreover, similar studies are expected to be performed in the proposed Future Circular Collider (FCC). Such perspectives motivate the investigation of the impact of New Physics on the predictions for the corresponding number of events. In this letter, we consider the 
model, which predicts an additional massive neutral gauge boson, 
that couples to neutrino and charged leptons of the second and third families, and estimate the production of a dimuon system in the neutrino trident scattering at the FASER2 assuming different models for the incoming neutrino flux at the LHC and FCC energies. We derive the associated sensitivity and demonstrate that the FPF@LHC is not able to improve the current bounds on the model, while a future measurement of the dimuons produced in neutrino trident events in the FPF@FCC will extend the coverage of the parameter space in comparison to previous experiments.
© The Author(s) 2025
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