First Measurement of the Muon Neutrino Interaction Cross Section and Flux as a Function of Energy at the LHC with FASER

This Letter presents the measurement of the energy-dependent neutrino-nucleon cross section in tungsten and the differential flux of muon neutrinos and antineutrinos. The analysis is performed using proton-proton collision data at a center-of-mass energy of 13.6 TeV and corresponding to an integrated luminosity of (65.6±1.4) fb^{-1}. Using the active electronic components of the FASER detector, 338.1±21.0 charged current muon neutrino interaction events are identified, with backgrounds from other processes subtracted. We unfold the neutrino events into a fiducial volume corresponding to the sensitive regions of the FASER detector and interpret the results in two ways: (i) we use the expected neutrino flux to measure the cross section, and (ii) we use the predicted cross section to measure the neutrino flux. Both results are presented in six bins of neutrino energy, achieving the first differential measurement in the TeV range. The observed distributions align with standard model predictions. Using this differential data, we extract the contributions of neutrinos from pion and kaon decays.

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Publication Details

Journal
Physical Review Letters
Published
2025-05-27
DOI
https://doi.org/10.1103/physrevlett.134.211801
Citations
16
Primary Topic
Particle physics theoretical and experimental studies
Type
article
Field-Weighted Citation Impact
29.92

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article

First Measurement of the Muon Neutrino Interaction Cross Section and Flux as a Function of Energy at the LHC with FASER

Carlo Alberto Fenoglio, F. Cadoux, Titi Preda, S. Jakobsen et al.
16 citations
Physical Review Letters
Particle physics theoretical and experimental studies
29.92
article

First Measurement of the Muon Neutrino Interaction Cross Section and Flux as a Function of Energy at the LHC with FASER

Carlo Alberto Fenoglio, F. Cadoux, Titi Preda, S. Jakobsen, Y. Xu, Y. Gornushkin, L. J. Levinson, R. Cardella, Max Fieg, Matteo Milanesio, D. Sgalaberna, S. Vasina, Jonathan L. Feng, Théo Moretti, Roshan Mammen Abraham, M. Shamim, T. Ariga, Charlotte Cavanagh, Andrea Pizarro Medina, T. Kugathasan, Edward Karl Galantay, Savannah Shively, Chiara Magliocca, A. M. Burger, Toni Mäkelä, E. Torrence, Z. Hu, Wissal Filali, C. B. Gwilliam, Laurie Nevay, H. Kawahara, Elena Firu, Sergey Dmitrievsky, K. Ohashi, Noshin Tarannum, U. Köse, M. Queitsch-Maitland, M. D’Onofrio, Hiroki Rokujo, S. M. Gibson, D. Casper, P. Scampoli, Hans Ludwig Joos, Yi Liu, J. Boyd, Eli Welch, H. Otono, X. Ai, J. A. Mcfayden, Rafaella Kotitsa, Ansh Desai, X. Chen, Tobias Boeckh, A. Coccaro, Alex Keyken, Jeremy Atkinson, M. Schott, D. Ferrère, J. K. Anders, Luca Iodice, Radu Dobre, Tomohiro Inada, D. Wang, P. Kontaxakis, M. Holzbock, Felix Kling, F. U. Bernlochner, M. T. Prim, Ali Garabaglu, Mitsuhiro Nakamura, Samuel Zahorec, Dhruv Chouhan, Sinead Eley, Lawson McCoy, Hao Pang, Brian Petersen, Osamu Sato, G. Iacobucci, C. Antel, A. Ariga, Daniela Köck, Shunliang Zhang, Jinfeng Liu, Yuxiao Wang, Stephane Débieux, Yannick Favre, K. Li, Y. Takubo, Margaret Lutz, B. Vormwald, L. Brenner, L. Paolozzi, K. Schmieden, D. E. Fellers, S.‐C. Hsu, O. Theiner, J. C. MacDonald, S. González-Sevilla, Toshiyuki Nakano, A. Sfyrla, S. Kuehn, M. Wielers, Oscar Ivan Valdes Martinez, D. Hayakawa, E. Kajomovitz, A. Rubbia, S. Zambito, Pawan Pawan, Jorge Sabater-Iglesias
article en
16 citations

Abstract

This Letter presents the measurement of the energy-dependent neutrino-nucleon cross section in tungsten and the differential flux of muon neutrinos and antineutrinos. The analysis is performed using proton-proton collision data at a center-of-mass energy of 13.6 TeV and corresponding to an integrated luminosity of (65.6±1.4) fb^{-1}. Using the active electronic components of the FASER detector, 338.1±21.0 charged current muon neutrino interaction events are identified, with backgrounds from other processes subtracted. We unfold the neutrino events into a fiducial volume corresponding to the sensitive regions of the FASER detector and interpret the results in two ways: (i) we use the expected neutrino flux to measure the cross section, and (ii) we use the predicted cross section to measure the neutrino flux. Both results are presented in six bins of neutrino energy, achieving the first differential measurement in the TeV range. The observed distributions align with standard model predictions. Using this differential data, we extract the contributions of neutrinos from pion and kaon decays.

Physical Review LettersVol. 134(21)
University of Geneva (CH), University of Bern (CH), Rutherford Appleton Laboratory (GB), University of Bonn (DE), Kyushu University (JP), University of Liverpool (GB), Chiba University (JP), University of Sussex (GB), Technion – Israel Institute of Technology (IL), Johannes Gutenberg University Mainz (DE), University of Washington (US), Charles University (CZ), Deutsches Elektronen-Synchrotron DESY (DE), University of California System (US), University of Manchester (GB), Zhengzhou University (CN), National Institute for Subatomic Physics (NL), Institute of Particle Physics (CA), Universitätsmedizin Göttingen (DE), National Institute of Technology (JP), Istituto Nazionale di Fisica Nucleare, Sezione di Genova (IT), Institute of Space Science - INFLPR Subsidiary (RO), Universidad de Londres (MX), Weizmann Institute of Science (IL), Nagoya University (JP), European Organization for Nuclear Research (CH), University of Naples Federico II (IT), Tsinghua University (CN)
National Science Foundation, Simons Foundation, CERN, Heising-Simons Foundation, Royal Society, Deutsche Forschungsgemeinschaft, Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung, National Natural Science Foundation of China, Bundesministerium für Bildung und Forschung, Tsinghua University, Horizon 2020 Framework Programme, Science and Technology Facilities Council, Japan Society for the Promotion of Science, Institute of Materials and Systems for Sustainability, Nagoya University, H2020 European Research Council, CHIST-ERA
Affordable and clean energy
Openalex Percentile: Top 0%
Particle physics theoretical and experimental studies
29.92
DOIOpen Access PDFOpenAlex
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