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Updated: Sep 17, 2025

Setting Limits on Supersymmetry Using Simplified Models
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Observation of Collider Neutrinos without Final State Muons with the SND@LHC Experiment
D Abbaneo1, S Ahmad1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40, R Albanese2,3
1European Organization for Nuclear Research (CERN), Geneva, Switzerland.
Abstract:
We report the observation of neutrino interactions without final state muons at the LHC, with a significance of 6.4σ. A dataset of proton-proton collisions at sqrt[s]=13.6 TeV collected by SND@LHC in 2022 and 2023 is used, corresponding to an integrated luminosity of 68.6 fb^{-1}. Neutrino interactions without a reconstructed muon are selected, resulting in an event sample consisting mainly of neutral-current and electron neutrino charged-current interactions in the detector. After selection cuts, 9 neutrino interaction candidate events are observed with an estimated background of 0.32 events.
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