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UNlocking the strong Interactions with COllideR Neutrinos

Objective

Proton collisions at the Large Hadron Collider (LHC) produce an intense flux of forward-directed neutrinos with the highest energies ever achieved in a laboratory. For 15 years, these neutrinos went undetected due to the lack of dedicated instrumentation. Their breakthrough observation in 2023 by the FASER and SND@LHC experiments marks the beginning of a new “collider neutrino” era, opening pioneering scientific opportunities. The study of these collider neutrinos addresses foundational questions in the strong interaction, from the antimatter content of the proton to the emergence of gluon-dominated matter. It also supports precise predictions for Higgs boson properties, enables isolating New Physics signatures at the LHC and the far-forward detectors, and offers a unique laboratory-based testbed for extreme phenomena in astroparticle physics.

To seize these unprecedented opportunities, UNICORN will develop a comprehensive theoretical framework for modelling collider neutrino production and scattering, combining state-of-the-art calculations and Monte Carlo simulations with machine learning techniques. Applied to FASER and SND@LHC data from Run 3 (2022–2026), this project will enable the first determination of neutrino and muon deep-inelastic structure functions at TeV energies, proton structure global analyses including collider neutrino constraints, the validation of forward hadron production models, and data-driven predictions for prompt fluxes and cross-sections for neutrino astronomy.

Exploiting the scientific potential of LHC neutrinos represents a once-in-a-lifetime transformative prospect for particle and astroparticle physics. By deploying our cutting-edge theoretical toolbox to the LHC far-forward experiments, UNICORN is uniquely positioned to scrutinise the strong interaction in uncharted regimes, provide critical inputs for Higgs physics and New Physics searches, and lay the groundwork for a thriving neutrino program at the High-Luminosity LHC

Fields of science (EuroSciVoc)

Keywords

Programme(s)

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Funding Scheme

HORIZON-ERC - HORIZON ERC Grants

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Call for proposal

(opens in new window) ERC-2025-ADG

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Host institution

STICHTING VU
Net EU contribution
€ 2 500 000,00
Address
DE BOELELAAN 1105
1081 HV Amsterdam
Netherlands
Activity type
Higher or Secondary Education Establishments
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Total cost
No data

Beneficiaries (1)