| Article | |
| Report number | arXiv:2403.12520 ; CERN-EP-2024-079 |
| Title | First measurement of the $\nu_e$ and $\nu_\mu$ interaction cross sections at the LHC with FASER’s emulsion detector |
| Author(s) |
Mammen Abraham, Roshan (UC, Irvine) ; Anders, John (CERN) ; Antel, Claire (Geneva U.) ; Ariga, Akitaka (Bern U., LHEP ; Chiba U.) ; Ariga, Tomoko (Kyushu U., Fukuoka (main)) ; Atkinson, Jeremy (Bern U., LHEP) ; Bernlochner, Florian U. (Bonn U.) ; Boeckh, Tobias (Bonn U.) ; Boyd, Jamie (CERN) ; Brenner, Lydia (NIKHEF, Amsterdam) ; Burger, Angela (CERN) ; Cadoux, Franck (Geneva U.) ; Cardella, Roberto (Geneva U.) ; Casper, David W. (UC, Irvine) ; Cavanagh, Charlotte (U. Liverpool (main)) ; Chen, Xin (Tsinghua U., Beijing) ; Coccaro, Andrea (INFN, Genoa) ; Debieux, Stephane (Geneva U.) ; D'Onofrio, Monica (U. Liverpool (main)) ; Desai, Ansh (Oregon U.) ; Dmitrievsky, Sergey (Unlisted) ; Eley, Sinead (U. Liverpool (main)) ; Favre, Yannick (Geneva U.) ; Fellers, Deion (Oregon U.) ; Feng, Jonathan L. (UC, Irvine) ; Fenoglio, Carlo Alberto (Geneva U.) ; Ferrere, Didier (Geneva U.) ; Fieg, Max (UC, Irvine) ; Filali, Wissal (Tsinghua U., Beijing) ; Fujimori, Haruhi (Chiba U.) ; Garabaglu, Ali (Washington U., Seattle) ; Gibson, Stephen (Royal Holloway, U. of London) ; Gonzalez-Sevilla, Sergio (Geneva U.) ; Gornushkin, Yuri (Unlisted) ; Gwilliam, Carl (U. Liverpool (main)) ; Hayakawa, Daiki (Chiba U.) ; Hsu, Shih-Chieh (Washington U., Seattle) ; Hu, Zhen (Tsinghua U., Beijing) ; Iacobucci, Giuseppe (Geneva U.) ; Inada, Tomohiro (CERN) ; Iodice, Luca (Geneva U.) ; Jakobsen, Sune (CERN) ; Joos, Hans (CERN ; Gottingen U., II. Phys. Inst.) ; Kajomovitz, Enrique (Technion) ; Kanai, Takumi (Chiba U.) ; Kawahara, Hiroaki (Kyushu U., Fukuoka (main)) ; Keyken, Alex (Royal Holloway, U. of London) ; Kling, Felix (DESY) ; Kock, Daniela (Oregon U.) ; Kontaxakis, Pantelis (Geneva U.) ; Kose, Umut (ETH, Zurich (main)) ; Kotitsa, Rafaella (CERN) ; Kuehn, Susanne (CERN) ; Kugathasan, Thanushan (Geneva U.) ; Lefebvre, Helena (Royal Holloway, U. of London) ; Levinson, Lorne (Weizmann Inst.) ; Li, Ke (Washington U., Seattle) ; Liu, Jinfeng (Tsinghua U., Beijing) ; Lutz, Margaret S. (CERN) ; MacDonald, Jack (Mainz U., Inst. Phys.) ; Magliocca, Chiara (Geneva U.) ; Martinelli, Fulvio (Geneva U.) ; McCoy, Lawson (UC, Irvine) ; McFayden, Josh (Sussex U.) ; Medina, Andrea Pizarro (Geneva U.) ; Milanesio, Matteo (Geneva U.) ; Moretti, Theo (Geneva U.) ; Munker, Magdalena (Geneva U.) ; Nakamura, Mitsuhiro (Nagoya U.) ; Nakano, Toshiyuki (Nagoya U.) ; Neuhaus, Friedemann (Mainz U., Inst. Phys.) ; Nevay, Laurie (CERN) ; Nonaka, Motoya (Chiba U.) ; Okui, Kazuaki (Chiba U.) ; Ohashi, Ken (Bern U., LHEP) ; Otono, Hidetoshi (Kyushu U., Fukuoka (main)) ; Pang, Hao (Tsinghua U., Beijing) ; Paolozzi, Lorenzo (CERN ; Geneva U.) ; Petersen, Brian (CERN) ; Prim, Markus (Bonn U.) ; Queitsch-Maitland, Michaela (Manchester U.) ; Rokujo, Hiroki (Nagoya U.) ; Ruiz-Choliz, Elisa (Mainz U., Inst. Phys.) ; Rubbia, Andre (ETH, Zurich (main)) ; Sabater-Iglesias, Jorge (Geneva U.) ; Sato, Osamu (Nagoya U.) ; Scampoli, Paola (Bern U., LHEP ; Naples U.) ; Schmieden, Kristof (Mainz U., Inst. Phys.) ; Schott, Matthias (Mainz U., Inst. Phys.) ; Sfyrla, Anna (Geneva U.) ; Shamim, Mansoora (CERN) ; Shively, Savannah (UC, Irvine) ; Takubo, Yosuke (KEK, Tsukuba) ; Tarannum, Noshin (Geneva U.) ; Theiner, Ondrej (Geneva U.) ; Torrence, Eric (Oregon U.) ; Vasina, Svetlana (Unlisted) ; Vormwald, Benedikt (CERN) ; Wang, Di (Tsinghua U., Beijing) ; Wang, Yuxiao (Tsinghua U., Beijing) ; Welch, Eli (UC, Irvine) ; Zahorec, Samuel (CERN ; Charles U.) ; Zambito, Stefano (Geneva U.) ; Zhang, Shunliang (Tsinghua U., Beijing) |
| Corporate Author(s) | The FASER collaboration |
| Publication | 2024-07-11 |
| Imprint | 20 Mar 2024 |
| Number of pages | 12 |
| In: | Phys. Rev. Lett. 133 (2024) 021802 |
| DOI | 10.1103/PhysRevLett.133.021802 (publication) |
| Subject category | Detectors and Experimental Techniques ; Particle Physics - Experiment ; Particle Physics - Phenomenology |
| Accelerator/Facility, Experiment | CERN LHC ; FASER |
| Free keywords | electroweak interaction ; forward physics ; lepton production ; experimental results ; FASER ; FASERnu detector ; electron neutrino ; muon neutrino ; crosssection ; LHC |
| Abstract | This paper presents the first results of the study of high-energy electron and muon neutrino charged-current interactions in the FASER$\nu$ emulsion/tungsten detector of the FASER experiment at the LHC. A subset of the FASER$\nu$ volume, which corresponds to a target mass of 128.6 kg, was exposed to neutrinos from the LHC $pp$ collisions with a centre-of-mass energy of 13.6 TeV and an integrated luminosity of 9.5 fb$^{-1}$. Applying stringent selections requiring electrons with reconstructed energy above 200 GeV, four electron neutrino interaction candidate events are observed with an expected background of $0.025^{+0.015}_{-0.010}$, leading to a statistical significance of 5.2$\sigma$. This is the first direct observation of electron neutrino interactions at a particle collider. Eight muon neutrino interaction candidate events are also detected, with an expected background of $0.22^{+0.09}_{-0.07}$, leading to a statistical significance of 5.7$\sigma$. The signal events include neutrinos with energies in the TeV range, the highest-energy electron and muon neutrinos ever detected from an artificial source. The energy-independent part of the interaction cross section per nucleon is measured over an energy range of 560--1740 GeV (520--1760 GeV) for $\nu_e$ ($\nu_{\mu}$) to be $(1.2_{-0.7}^{+0.8}) \times 10^{-38} \mathrm{cm}^{2}\,\mathrm{GeV}^{-1}$ ($(0.5\pm0.2) \times 10^{-38} \mathrm{cm}^{2}\,\mathrm{GeV}^{-1}$), consistent with Standard Model predictions. These are the first measurements of neutrino interaction cross sections in those energy ranges. |
| Copyright/License | Publication: © 2024 authors (License: CC BY 4.0), sponsored by SCOAP³ Preprint: © 2024 CERN (License: CC-BY-4.0) |
Corresponding record in: Inspire
Email contact: [email protected]
Notice créée le 2024-03-12, modifiée le 2024-10-18
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