Observation of collider neutrinos without final state muons with the SND@LHC experiment
Abstract
We report the observation of neutrino interactions without final state muons at the LHC, with a significance of 6.4 σ. A data set of proton-proton collisions at 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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