Discovering neutrino tridents at the Large Hadron Collider

Abstract

Neutrino trident production of di-lepton pairs is well recognized as a sensitive probe of both electroweak physics and physics beyond the Standard Model. Although a rare process, it could be significantly boosted by such new physics, and it also allows the electroweak theory to be tested in a new regime. We demonstrate that the forward neutrino physics program at the Large Hadron Collider offers a promising opportunity to measure for the first time, dimuon neutrino tridents with a statistical significance exceeding $5\sigma$. We present predictions for various proposed experiments and outline a specific experimental strategy to identify the signal and mitigate backgrounds, based on "reverse tracking" dimuon pairs in the FASER$\nu$2 detector. We also discuss prospects for constraining beyond Standard Model contributions to neutrino trident rates at high energies.

19 pages, 11 figures

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• Science and Project Planning for the Forward Physics Facility in Preparation for the 2024-2026 European Particle Physics Strategy Update
• Neutrino Experiments at the Large Hadron Collider
• Detecting LHC Neutrinos at Surface Level
• Neutrino-Portal Dark Matter Detection Prospects at a Future Muon Collider
• Dark Matter Internal Pair Production -- A Novel Direct Detection Mechanism
• Tau Tridents at Accelerator Neutrino Facilities
• Probing a $Z^{\prime }$ gauge boson via neutrino trident scattering in the Forward Physics Facility at the LHC and FCC
• Letter of Intent: The Forward Physics Facility
• Neutrino Physics and Astrophysics at Colliders
• Muon trident process at far-forward LHC detectors
• The $U(1{)}_{L_{\mu }-L_{\tau }}$ model meets the new $(g-2{)}_{\mu }$ data and muon neutrino trident scattering