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FASER Conference Notes

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2026-03-12
18:48
Measurement of Muon Neutrinos as a Function of Energy and Rapidity with FASER / Filali, Wissal (University of Bonn (DE)) ; Bernlochner, Florian Urs (University of Bonn (DE)) ; Bockh, Tobias (University of Bonn (DE)) ; Wilson, Benjamin James (The University of Manchester (GB)) ; Martinez, Oscar (The University of Manchester (GB)) ; Kling, Felix (University of Bonn (DE)) ; Queitsch-Maitland, Michaela (The University of Manchester (GB)) ; Laudage, Sebastian (University of Bonn (DE)) /FASER collaboration
We present a double-differential measurement of the muon neutrino flux and neutrino--nucleon cross section as functions of neutrino energy $E$ and rapidity $y$, using proton--proton collision data at $\sqrt{s} = 13.6$~TeV recorded during LHC Run~3, corresponding to an integrated luminosity of $(186 \pm 4) ~\text{fb}^{−1}$. Charged-current muon neutrino interactions are identified using the active electronic components of the FASER detector, enabling the measurement of the neutrino flux as a function of rapidity in the far-forward region of the LHC. [...]
CERN-FASER-CONF-2026-005.- Geneva : CERN, 2026 Fulltext: PDF;

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2026-03-11
16:48
Measurement of High-Energy Electron Neutrino Interactions with the FASER Calorimeter at the LHC / FASER collaboration
This conference note documents the observation of electron neutrinos in FASER's electronic detector, measuring interactions in the calorimeter based on their electromagnetic energy deposits. The results use LHC proton-proton collision data at $\sqrt{s}=13.6$ TeV, corresponding to an integrated luminosity of $(176.8 \pm 3.6)$ fb$^{-1}$ with the combined 2022, 2023 and 2024 Run 3 dataset. [...]
CERN-FASER-CONF-2026-004.- Geneva : CERN, 2026 Electronic Electron Neutrino Conference Note: PDF;

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2026-03-09
23:06
First search for neutrino-induced charm hadrons with FASER's emulsion detector at the LHC / Thor, Simon (ETH Zurich (CH)) ; Moriyama, Keiko (Kyushu University (JP)) ; Ariga, Tomoko (Kyushu University (JP)) ; Kose, Umut (ETH Zurich (CH)) /FASER collaboration
This note presents the first search for charmed-hadron production in high-energy electron and muon neutrino charged-current interactions in the FASER$\nu$ emulsion--tungsten detector at the LHC. Dedicated tools for reconstructing displaced secondary vertices and classifying decay topologies of charged charm hadrons have been developed and validated using Monte Carlo simulation. [...]
CERN-FASER-CONF-2026-003.- Geneva : CERN, 2026 Fulltext: PDF;

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2026-03-09
15:40
Cross section measurements of high-energy electron and muon neutrino interactions with FASER's emulsion detector at the LHC / Atkinson, Jeremy (Universitaet Bern (CH)) ; Ariga, Akitaka (Chiba University (JP)) ; Ariga, Tomoko (Kyushu University (JP)) ; Dmitrievskiy, Sergey (Joint Institute for Nuclear Research (RU)) ; Ohashi, Ken (Universitaet Bern (CH)) ; Thor, Simon (ETH Zurich (CH)) /FASER collaboration
This note presents updated results from the search for high-energy electron and muon neutrino charged-current interactions in the FASER$\nu$ emulsion/tungsten sub-detector of FASER. A subset of the FASER$\nu$ volume is used, corresponding to a target mass of 681.1 kg, collecting 9.5 fb$^{-1}$ of LHC proton-proton collision data in 2022 at a centre-of-mass energy of 13.6 TeV. [...]
CERN-FASER-CONF-2026-002.- Geneva : CERN, 2026 Conference note for Moriond 2026, version 1: PDF;

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2026-03-03
16:51
New Results from a Search for Dark Photons with the FASER Detector at the LHC /FASER collaboration
FASER is an experiment at the LHC designed to search for light, feebly-interacting particles produced in proton-proton collisions at the ATLAS interaction point that travel in the far forward direction. Here we present results from a search for dark photons decaying to electron-positron pairs using a dataset corresponding to an integrated luminosity of 177~$\text{fb}^{-1}$. [...]
CERN-FASER-CONF-2026-001.- Geneva : CERN, 2026 Fulltext: PDF;

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2025-06-23
11:22
Latest neutrino results from the FASER experiment and their implications for forward hadron production / FASER collaboration
The muon puzzle --- an excess of muons relative to simulation predictions in ultra-high-energy cosmic-ray air showers --- has been reported by many experiments. This suggests that forward particle production in hadronic interactions is not fully understood. [...]
arXiv:2507.23552; CERN-FASER-CONF-2025-004.- Geneva : CERN, 2025-09-24 - 10 p. - Published in : PoS ICRC2025 (2025) 349 CONF Note Submitted: PDF; Fulltext: 2507.23552 - PDF; document - PDF;
In : 39th International Cosmic Ray Conference (ICRC 2025), Geneva, Switzerland, 14 - 24 Jul 2025, pp.349

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2025-03-25
00:17
Updated results of high-energy electron and muon neutrino interactions with FASER's emulsion detector at the LHC / Ariga, Akitaka (Chiba University (JP)) ; Ariga, Tomoko (Kyushu University (JP)) /FASER collaboration
CERN-FASER-CONF-2025-002.- Geneva : CERN, 2025 Fulltext: PDF;

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2025-03-23
17:56
Measurement of the Muon Neutrino Flux as a Function of the Rapidity with FASER / FASER collaboration
We present the measurement of the differential neutrino flux as a function of rapidity $y$ using data from proton-proton collisions at $\sqrt{s} = 13.6 , \mathrm{TeV}$ during LHC Run 3, corresponding to an integrated luminosity of $65.6 , \mathrm{fb}^{-1}$. Charged-current muon neutrino interactions are identified using the FASER detector, and the neutrino flux is measured as a function of rapidity. [...]
CERN-FASER-CONF-2025-001.- Geneva : CERN, 2025 Fulltext: PDF;
In : 59th Rencontres de Moriond on Electroweak Interactions and Unified Theories, La Thuile, It, 23 - 30 Mar 2025

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2023-08-23
15:45
Observation of high-energy electron neutrino interactions with FASER's emulsion detector at the LHC /FASER collaboration
This note presents the first results from the search for high energy electron and muon neutrino charged-current interactions in the FASER$\nu$ emulsion/tungsten sub-detector of FASER. A subset of the FASER$\nu$ volume is used, corresponding to a target mass of 68~kg, exposed to 9.5~$fb^{-1}$ of LHC proton-proton collision data with a centre of mass energy of 13.6~TeV. [...]
CERN-FASER-CONF-2023-002.- Geneva : CERN, 2023 Fulltext: PDF;
In : 2023 European Physical Society Conference on High Energy Physics (EPS-HEP2023), Hamburg, Germany, 20 - 25 Aug 2023

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2023-03-22
12:07
First Results from the Search for Dark Photons with the FASER Detector at the LHC /FASER collaboration
FASER is an LHC experiment designed to search for light, weakly-interacting particles that are produced in proton-proton collisions at the ATLAS interaction point and travel in the far-forward direction. The first results from a search for dark photons decaying to an electron-positron pair, using a dataset corresponding to an integrated luminosity of 27.0 fb$^{-1}$ collected at center-of-mass energy $\sqrt{s} = 13.6$ TeV in 2022 in LHC Run 3, are presented. [...]
CERN-FASER-CONF-2023-001.- Geneva : CERN, 2023 Fulltext: PDF;
In : 57th Rencontres de Moriond on QCD and High Energy Interactions, La Thuile, Italy, 25 Mar - 1 Apr 2023

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