First Direct Observation of Collider Neutrinos with FASER at the LHC



Abreu, Henso, Anders, John, Antel, Claire, Ariga, Akitaka, Ariga, Tomoko, Atkinson, Jeremy, Bernlochner, Florian U, Blesgen, Tobias, Boeckh, Tobias, Boyd, Jamie
et al (show 77 more authors) (2023) First Direct Observation of Collider Neutrinos with FASER at the LHC. PHYSICAL REVIEW LETTERS, 131 (3). 031801-.

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Abstract

We report the first direct observation of neutrino interactions at a particle collider experiment. Neutrino candidate events are identified in a 13.6 TeV center-of-mass energy pp collision dataset of 35.4  fb^{-1} using the active electronic components of the FASER detector at the Large Hadron Collider. The candidates are required to have a track propagating through the entire length of the FASER detector and be consistent with a muon neutrino charged-current interaction. We infer 153_{-13}^{+12} neutrino interactions with a significance of 16 standard deviations above the background-only hypothesis. These events are consistent with the characteristics expected from neutrino interactions in terms of secondary particle production and spatial distribution, and they imply the observation of both neutrinos and anti-neutrinos with an incident neutrino energy of significantly above 200 GeV.

Item Type: Article
Uncontrolled Keywords: FASER Collaboration
Divisions: Faculty of Science and Engineering > School of Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 18 Sep 2023 08:16
Last Modified: 18 Oct 2023 15:34
DOI: 10.1103/PhysRevLett.131.031801
Open Access URL: https://journals.aps.org/prl/abstract/10.1103/Phys...
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URI: https://livrepository.liverpool.ac.uk/id/eprint/3172803