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First neutrino interaction candidates at the LHC

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arxiv 2105.06197 v3 pith:HZ4DGGHF submitted 2021-05-13 hep-ex hep-phphysics.ins-det

First neutrino interaction candidates at the LHC

FASER Collaboration: Henso Abreu , Yoav Afik , Claire Antel , Jason Arakawa , Akitaka Ariga , Tomoko Ariga , Florian Bernlochner , Tobias Boeckh
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Jamie Boyd Lydia Brenner Franck Cadoux David W. Casper Charlotte Cavanagh Francesco Cerutti Xin Chen Andrea Coccaro Monica D'Onofrio Candan Dozen Yannick Favre Deion Fellers Jonathan L. Feng Didier Ferrere Stephen Gibson Sergio Gonzalez-Sevilla Carl Gwilliam Shih-Chieh Hsu Zhen Hu Giuseppe Iacobucci Tomohiro Inada Ahmed Ismail Sune Jakobsen Enrique Kajomovitz Felix Kling Umut Kose Susanne Kuehn Helena Lefebvre Lorne Levinson Ke Li Jinfeng Liu Chiara Magliocca Josh McFayden Sam Meehan Dimitar Mladenov Mitsuhiro Nakamura Toshiyuki Nakano Marzio Nessi Friedemann Neuhaus Laurie Nevay Hidetoshi Otono Carlo Pandini Hao Pang Lorenzo Paolozzi Brian Petersen Francesco Pietropaolo Markus Prim Michaela Queitsch-Maitland Filippo Resnati Hiroki Rokujo Marta Sabat\'e-Gilarte Jakob Salfeld-Nebgen Osamu Sato Paola Scampoli Kristof Schmieden Matthias Schott Anna Sfyrla Savannah Shively John Spencer Yosuke Takubo Ondrej Theiner Eric Torrence Sebastian Trojanowski Serhan Tufanli Benedikt Vormwald Di Wang Gang Zhang
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classification hep-ex hep-phphysics.ins-det
keywords firstinteractionneutrinocandidatescolliderdatameasurementspilot
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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FASER$\nu$ at the CERN Large Hadron Collider (LHC) is designed to directly detect collider neutrinos for the first time and study their cross sections at TeV energies, where no such measurements currently exist. In 2018, a pilot detector employing emulsion films was installed in the far-forward region of ATLAS, 480 m from the interaction point, and collected 12.2 fb$^{-1}$ of proton-proton collision data at a center-of-mass energy of 13 TeV. We describe the analysis of this pilot run data and the observation of the first neutrino interaction candidates at the LHC. This milestone paves the way for high-energy neutrino measurements at current and future colliders.

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Cited by 3 Pith papers

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  1. Non-Standard Neutrino Interactions at a Muon Collider Neutrino Detector

    hep-ph 2025-08 unverdicted novelty 6.0

    A forward neutrino detector at a muon collider can exceed current and upcoming bounds on non-standard neutrino interactions by exploiting high neutrino flux, known flavor composition, and chirality.

  2. Electromagnetic Shower Reconstruction and Identification in FASER's Emulsion Detector for LHC Forward Neutrino Measurements

    hep-ex 2026-06 unverdicted novelty 4.0

    Clustering-based reconstruction and multi-level identification (pre-selection, cuts, BDT) achieve 99.9% background rejection, 59-71% efficiency, and 23-25% energy resolution for EM showers in FASERnu emulsion detector...

  3. Lepton interactions from GeV to EeV

    hep-ph 2026-06 unverdicted novelty 3.0

    Phenomenological study predicting incomplete tau polarization at FASER2, observable neutrino and muon trident processes, and contributions to hadron structure from IceCube neutrino events.