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12 results on '"Nevay, Laurie"'

1. Shining Light on the Dark Sector: Search for Axion-like Particles and Other New Physics in Photonic Final States with FASER

Author

FASER collaboration, Abraham, Roshan Mammen, Ai, Xiaocong, Anders, John, Antel, Claire, Ariga, Akitaka, Ariga, Tomoko, Atkinson, Jeremy, Bernlochner, Florian U., Bianchi, Emma, Boeckh, Tobias, Boyd, Jamie, Brenner, Lydia, Burger, Angela, Cadoux, Franck, Cardella, Roberto, Casper, David W., Cavanagh, Charlotte, Chen, Xin, Cho, Eunhyung, Chouhan, Dhruv, Coccaro, Andrea, Débieux, Stephane, D'Onofrio, Monica, Desai, Ansh, Dmitrievsky, Sergey, Dobre, Radu, Eley, Sinead, Favre, Yannick, Fellers, Deion, Feng, Jonathan L., Fenoglio, Carlo Alberto, Ferrere, Didier, Fieg, Max, Filali, Wissal, Firu, Elena, Garabaglu, Ali, Gibson, Stephen, Gonzalez-Sevilla, Sergio, Gornushkin, Yuri, Gwilliam, Carl, Hayakawa, Daiki, Holzbock, Michael, Hsu, Shih-Chieh, Hu, Zhen, Iacobucci, Giuseppe, Inada, Tomohiro, Iodice, Luca, Jakobsen, Sune, Joos, Hans, Kajomovitz, Enrique, Kawahara, Hiroaki, Keyken, Alex, Kling, Felix, Köck, Daniela, Kontaxakis, Pantelis, Kose, Umut, Kotitsa, Rafaella, Kuehn, Susanne, Kugathasan, Thanushan, Levinson, Lorne, Li, Ke, Liu, Jinfeng, Liu, Yi, Lutz, Margaret S., MacDonald, Jack, Magliocca, Chiara, Mäkelä, Toni, McCoy, Lawson, McFayden, Josh, Medina, Andrea Pizarro, Milanesio, Matteo, Moretti, Théo, Nakamura, Mitsuhiro, Nakano, Toshiyuki, Nevay, Laurie, Ohashi, Ken, Otono, Hidetoshi, Paolozzi, Lorenzo, Petersen, Brian, Preda, Titi, Prim, Markus, Queitsch-Maitland, Michaela, Rokujo, Hiroki, Rubbia, André, Sabater-Iglesias, Jorge, Sato, Osamu, Scampoli, Paola, Schmieden, Kristof, Schott, Matthias, Sfyrla, Anna, Sgalaberna, Davide, Shamim, Mansoora, Shively, Savannah, Takubo, Yosuke, Tarannum, Noshin, Theiner, Ondrej, Torrence, Eric, Martinez, Oscar Ivan Valdes, Vasina, Svetlana, Vormwald, Benedikt, Wang, Di, Wang, Yuxiao, Welch, Eli, Xu, Yue, Zahorec, Samuel, Zambito, Stefano, and Zhang, Shunliang

Subjects
High Energy Physics - Experiment
Abstract

The first FASER search for a light, long-lived particle decaying into a pair of photons is reported. The search uses LHC proton-proton collision data at $\sqrt{s}=13.6~\text{TeV}$ collected in 2022 and 2023, corresponding to an integrated luminosity of $57.7\text{fb}^{-1}$. A model with axion-like particles (ALPs) dominantly coupled to weak gauge bosons is the primary target. Signal events are characterised by high-energy deposits in the electromagnetic calorimeter and no signal in the veto scintillators. One event is observed, compared to a background expectation of $0.44 \pm 0.39$ events, which is entirely dominated by neutrino interactions. World-leading constraints on ALPs are obtained for masses up to $300~\text{MeV}$ and couplings to the Standard Model W gauge boson, $g_{aWW}$, around $10^{-4}$ GeV$^{-1}$, testing a previously unexplored region of parameter space. Other new particle models that lead to the same experimental signature, including ALPs coupled to gluons or photons, U(1)$_B$ gauge bosons, up-philic scalars, and a Type-I two-Higgs doublet model, are also considered for interpretation, and new constraints on previously viable parameter space are presented in this paper., Comment: 37 pages, 22 figures

Published
2024

2. First Measurement of the $\nu_e$ and $\nu_\mu$ Interaction Cross Sections at the LHC with FASER's Emulsion Detector

Author

FASER Collaboration, Abraham, Roshan Mammen, Anders, John, Antel, Claire, Ariga, Akitaka, Ariga, Tomoko, Atkinson, Jeremy, Bernlochner, Florian U., Boeckh, Tobias, Boyd, Jamie, Brenner, Lydia, Burger, Angela, Cadoux, Franck, Cardella, Roberto, Casper, David W., Cavanagh, Charlotte, Chen, Xin, Coccaro, Andrea, Debieux, Stephane, D'Onofrio, Monica, Desai, Ansh, Dmitrievsky, Sergey, Eley, Sinead, Favre, Yannick, Fellers, Deion, Feng, Jonathan L., Fenoglio, Carlo Alberto, Ferrere, Didier, Fieg, Max, Filali, Wissal, Fujimori, Haruhi, Garabaglu, Ali, Gibson, Stephen, Gonzalez-Sevilla, Sergio, Gornushkin, Yuri, Gwilliam, Carl, Hayakawa, Daiki, Hsu, Shih-Chieh, Hu, Zhen, Iacobucci, Giuseppe, Inada, Tomohiro, Iodice, Luca, Jakobsen, Sune, Joos, Hans, Kajomovitz, Enrique, Kanai, Takumi, Kawahara, Hiroaki, Keyken, Alex, Kling, Felix, Kock, Daniela, Kontaxakis, Pantelis, Kose, Umut, Kotitsa, Rafaella, Kuehn, Susanne, Kugathasan, Thanushan, Lefebvre, Helena, Levinson, Lorne, Li, Ke, Liu, Jinfeng, Lutz, Margaret S., MacDonald, Jack, Magliocca, Chiara, Martinelli, Fulvio, McCoy, Lawson, McFayden, Josh, Medina, Andrea Pizarro, Milanesio, Matteo, Moretti, Theo, Munker, Magdalena, Nakamura, Mitsuhiro, Nakano, Toshiyuki, Neuhaus, Friedemann, Nevay, Laurie, Nonaka, Motoya, Okui, Kazuaki, Ohashi, Ken, Otono, Hidetoshi, Pang, Hao, Paolozzi, Lorenzo, Petersen, Brian, Prim, Markus, Queitsch-Maitland, Michaela, Rokujo, Hiroki, Ruiz-Choliz, Elisa, Rubbia, André, Sabater-Iglesias, Jorge, Sato, Osamu, Scampoli, Paola, Schmieden, Kristof, Schott, Matthias, Sfyrla, Anna, Shamim, Mansoora, Shively, Savannah, Takubo, Yosuke, Tarannum, Noshin, Theiner, Ondrej, Torrence, Eric, Vasina, Svetlana, Vormwald, Benedikt, Wang, Di, Wang, Yuxiao, Welch, Eli, Zahorec, Samuel, Zambito, Stefano, and Zhang, Shunliang

Subjects
High Energy Physics - Experiment, High Energy Physics - Phenomenology, Physics - Instrumentation and Detectors
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.

Published
2024
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3. Neutrino Rate Predictions for FASER

Author

FASER Collaboration, Abraham, Roshan Mammen, Anders, John, Antel, Claire, Ariga, Akitaka, Ariga, Tomoko, Atkinson, Jeremy, Bernlochner, Florian U., Boeckh, Tobias, Boyd, Jamie, Brenner, Lydia, Burger, Angela, Cadoux, Franck, Cardella, Roberto, Casper, David W., Cavanagh, Charlotte, Chen, Xin, Coccaro, Andrea, Débieux, Stephane, D'Onofrio, Monica, Desai, Ansh, Dmitrievsky, Sergey, Eley, Sinead, Favre, Yannick, Fellers, Deion, Feng, Jonathan L., Fenoglio, Carlo Alberto, Ferrere, Didier, Fieg, Max, Filali, Wissal, Gibson, Stephen, Gonzalez-Sevilla, Sergio, Gornushkin, Yuri, Gwilliam, Carl, Hayakawa, Daiki, Hsu, Shih-Chieh, Hu, Zhen, Iacobucci, Giuseppe, Inada, Tomohiro, Iodice, Luca, Jakobsen, Sune, Joos, Hans, Kajomovitz, Enrique, Kawahara, Hiroaki, Keyken, Alex, Kling, Felix, Köck, Daniela, Kontaxakis, Pantelis, Kose, Umut, Kotitsa, Rafaella, Kuehn, Susanne, Kugathasan, Thanushan, Lefebvre, Helena, Levinson, Lorne, Li, Ke, Liu, Jinfeng, Lutz, Margaret S., MacDonald, Jack, Magliocca, Chiara, Martinelli, Fulvio, McCoy, Lawson, McFayden, Josh, Medina, Andrea Pizarro, Milanesio, Matteo, Moretti, Théo, Munker, Magdalena, Nakamura, Mitsuhiro, Nakano, Toshiyuki, Neuhaus, Friedemann, Nevay, Laurie, Ohashi, Ken, Otono, Hidetoshi, Pang, Hao, Paolozzi, Lorenzo, Petersen, Brian, Prim, Markus, Queitsch-Maitland, Michaela, Rokujo, Hiroki, Ruiz-Choliz, Elisa, Rubbia, André, Sabater-Iglesias, Jorge, Sato, Osamu, Scampoli, Paola, Schmieden, Kristof, Schott, Matthias, Sfyrla, Anna, Shamim, Mansoora, Shively, Savannah, Takubo, Yosuke, Tarannum, Noshin, Theiner, Ondrej, Torrence, Eric, Vasina, Svetlana, Vormwald, Benedikt, Wang, Di, Wang, Yuxiao, Welch, Eli, Zahorec, Samuel, Zambito, Stefano, and Zhang, Shunliang

Subjects
High Energy Physics - Experiment, High Energy Physics - Phenomenology
Abstract

The Forward Search Experiment (FASER) at CERN's Large Hadron Collider (LHC) has recently directly detected the first collider neutrinos. Neutrinos play an important role in all FASER analyses, either as signal or background, and it is therefore essential to understand the neutrino event rates. In this study, we update previous simulations and present prescriptions for theoretical predictions of neutrino fluxes and cross sections, together with their associated uncertainties. With these results, we discuss the potential for possible measurements that could be carried out in the coming years with the FASER neutrino data to be collected in LHC Run 3 and Run 4., Comment: 19 pages, 10 figures

Published
2024

4. First Direct Observation of Collider Neutrinos with FASER at the LHC

Author

FASER Collaboration, Abreu, Henso, Anders, John, Antel, Claire, Ariga, Akitaka, Ariga, Tomoko, Atkinson, Jeremy, Bernlochner, Florian U., Blesgen, Tobias, Boeckh, Tobias, Boyd, Jamie, Brenner, Lydia, Cadoux, Franck, Casper, David W., Cavanagh, Charlotte, Chen, Xin, Coccaro, Andrea, Desai, Ansh, Dmitrievsky, Sergey, D'Onofrio, Monica, Favre, Yannick, Fellers, Deion, Feng, Jonathan L., Fenoglio, Carlo Alberto, Ferrere, Didier, Gibson, Stephen, Gonzalez-Sevilla, Sergio, Gornushkin, Yuri, Gwilliam, Carl, Hayakawa, Daiki, Hsu, Shih-Chieh, Hu, Zhen, Iacobucci, Giuseppe, Inada, Tomohiro, Jakobsen, Sune, Joos, Hans, Kajomovitz, Enrique, Kawahara, Hiroaki, Keyken, Alex, Kling, Felix, Köck, Daniela, Kose, Umut, Kotitsa, Rafaella, Kuehn, Susanne, Lefebvre, Helena, Levinson, Lorne, Li, Ke, Liu, Jinfeng, MacDonald, Jack, Magliocca, Chiara, Martinelli, Fulvio, McFayden, Josh, Milanesio, Matteo, Mladenov, Dimitar, Moretti, Théo, Munker, Magdalena, Nakamura, Mitsuhiro, Nakano, Toshiyuki, Nessi, Marzio, Neuhaus, Friedemann, Nevay, Laurie, Otono, Hidetoshi, Pang, Hao, Paolozzi, Lorenzo, Petersen, Brian, Pietropaolo, Francesco, Prim, Markus, Queitsch-Maitland, Michaela, Resnati, Filippo, Rokujo, Hiroki, Ruiz-Choliz, Elisa, Sabater-Iglesias, Jorge, Sato, Osamu, Scampoli, Paola, Schmieden, Kristof, Schott, Matthias, Sfyrla, Anna, Shively, Savannah, Takubo, Yosuke, Tarannum, Noshin, Theiner, Ondrej, Torrence, Eric, Tufanli, Serhan, Vasina, Svetlana, Vormwald, Benedikt, Wang, Di, Welch, Eli, and Zambito, Stefano

Subjects
High Energy Physics - Experiment, High Energy Physics - Phenomenology
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 data set 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 $153^{+12}_{-13}$ 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., Comment: Submitted to PRL on March 24 2023

Published
2023
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5. The FASER Detector

Author

FASER Collaboration, Abreu, Henso, Mansour, Elham Amin, Antel, Claire, Ariga, Akitaka, Ariga, Tomoko, Bernlochner, Florian, Boeckh, Tobias, Boyd, Jamie, Brenner, Lydia, Cadoux, Franck, Casper, David W., Cavanagh, Charlotte, Chen, Xin, Coccaro, Andrea, Crespo-Lopez, Olivier, Debieux, Stephane, D'Onofrio, Monica, Dougherty, Liam, Dozen, Candan, Ezzat, Abdallah, Favre, Yannick, Fellers, Deion, Feng, Jonathan L., Ferrere, Didier, Galantay, Edward Karl, Gall, Jonathan, Gamberini, Enrico, Gibson, Stephen, Gonzalez-Sevilla, Sergio, Gwilliam, Carl, Hayakawa, Daiki, Hsu, Shih-Chieh, Hu, Zhen, Iacobucci, Giuseppe, Inada, Tomohiro, Jakobsen, Sune, Johnson, Eliott, Kajomovitz, Enrique, Kawahara, Hiroaki, Kling, Felix, Kose, Umut, Kotitsa, Rafaella, Krusse, Jesse, Kuehn, Susanne, Lefebvre, Helena, Levinson, Lorne, Li, Ke, Liu, Jinfeng, Magliocca, Chiara, Martinelli, Fulvio, McFayden, Josh, Meehan, Sam, Milanesio, Matteo, Miura, Manato, Mladenov, Dimitar, Moretti, Theo, Munker, Magdalena, Nakamura, Mitsuhiro, Nakano, Toshiyuki, Nessi, Marzio, Neuhaus, Friedemann, Nevay, Laurie, Osborne, John, Otono, Hidetoshi, Pandini, Carlo, Pang, Hao, Paolozzi, Lorenzo, Petersen, Brian, Pietropaolo, Francesco, Prim, Markus, Queitsch-Maitland, Michaela, Resnati, Filippo, Rizzi, Chiara, Rokujo, Hiroki, Ruiz-Choliz, Elisa, Salfeld-Nebgen, Jakob, Galan, Francisco Sanchez, Sato, Osamu, Scampoli, Paola, Schmieden, Kristof, Schott, Matthias, Sfyrla, Anna, Shively, Savannah, Sipos, Roland, Spencer, John, Takubo, Yosuke, Tarannum, Noshin, Theiner, Ondrej, Thonet, Pierre, Torrence, Eric, Tufanli, Serhan, Vendeuvre, Camille, Vormwald, Benedikt, Wang, Di, Zambito, Stefano, and Zhang, Gang

Subjects
Physics - Instrumentation and Detectors, High Energy Physics - Experiment
Abstract

FASER, the ForwArd Search ExpeRiment, is an experiment dedicated to searching for light, extremely weakly-interacting particles at CERN's Large Hadron Collider (LHC). Such particles may be produced in the very forward direction of the LHC's high-energy collisions and then decay to visible particles inside the FASER detector, which is placed 480 m downstream of the ATLAS interaction point, aligned with the beam collisions axis. FASER also includes a sub-detector, FASER$\nu$, designed to detect neutrinos produced in the LHC collisions and to study their properties. In this paper, each component of the FASER detector is described in detail, as well as the installation of the experiment system and its commissioning using cosmic-rays collected in September 2021 and during the LHC pilot beam test carried out in October 2021. FASER will start taking LHC collision data in 2022, and will run throughout LHC Run 3., Comment: 92 pages, 72 Figures

Published
2022
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6. The tracking detector of the FASER experiment

Author

FASER Collaboration, Abreu, Henso, Antel, Claire, Ariga, Akitaka, Ariga, Tomoko, Bernlochner, Florian, Boeckh, Tobias, Boyd, Jamie, Brenner, Lydia, Cadoux, Franck, Casper, David W., Cavanagh, Charlotte, Chen, Xin, Coccaro, Andrea, Crespo-Lopez, Olivier, Dmitrievsky, Sergey, D'Onofrio, Monica, Dozen, Candan, Ezzat, Abdallah, Favre, Yannick, Fellers, Deion, Feng, Jonathan L., Ferrere, Didier, Gibson, Stephen, Gonzalez-Sevilla, Sergio, Gornushkin, Yuri, Gwilliam, Carl, Hsu, Shih-Chieh, Hu, Zhen, Iacobucci, Giuseppe, Inada, Tomohiro, Jakobsen, Sune, Kajomovitz, Enrique, Kling, Felix, Kose, Umut, Kuehn, Susanne, Lefebvre, Helena, Levinson, Lorne, Li, Ke, Liu, Jinfeng, Magliocca, Chiara, McFayden, Josh, Milanesio, Matteo, Meehan, Sam, Mladenov, Dimitar, Moretti, Theo, Munker, Magdalena, Nakamura, Mitsuhiro, Nakano, Toshiyuki, Nessi, Marzio, Neuhaus, Friedemann, Nevay, Laurie, Otono, Hidetoshi, Pandini, Carlo, Pang, Hao, Paolozzi, Lorenzo, Petersen, Brian, Pietropaolo, Francesco, Prim, Markus, Queitsch-Maitland, Michaela, Resnati, Filippo, Rizzi, Chiara, Rokujo, Hiroki, Ruiz-Choliz, Elisa, Salfeld-Nebgen, Jakob, Sato, Osamu, Scampoli, Paola, Schmieden, Kristof, Schott, Matthias, Sfyrla, Anna, Shively, Savannah, Spencer, John, Takubo, Yosuke, Tarannum, Noshin, Theiner, Ondrej, Torrence, Eric, Tufanli, Serhan, Vasina, Svetlana, Vormwald, Benedikt, and Wang, Di

Subjects
Physics - Instrumentation and Detectors, High Energy Physics - Experiment
Abstract

FASER is a new experiment designed to search for new light weakly-interacting long-lived particles (LLPs) and study high-energy neutrino interactions in the very forward region of the LHC collisions at CERN. The experimental apparatus is situated 480 m downstream of the ATLAS interaction-point aligned with the beam collision axis. The FASER detector includes four identical tracker stations constructed from silicon microstrip detectors. Three of the tracker stations form a tracking spectrometer, and enable FASER to detect the decay products of LLPs decaying inside the apparatus, whereas the fourth station is used for the neutrino analysis. The spectrometer has been installed in the LHC complex since March 2021, while the fourth station is not yet installed. FASER will start physics data taking when the LHC resumes operation in early 2022. This paper describes the design, construction and testing of the tracking spectrometer, including the associated components such as the mechanics, readout electronics, power supplies and cooling system.

Published
2021
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7. The tracking detector of the FASER experiment

Author

Collaboration, FASER, Abreu, Henso, Antel, Claire, Ariga, Akitaka, Ariga, Tomoko, Bernlochner, Florian, Boeckh, Tobias, Boyd, Jamie, Brenner, Lydia, Cadoux, Franck, Casper, David W, Cavanagh, Charlotte, Chen, Xin, Coccaro, Andrea, Crespo-Lopez, Olivier, Dmitrievsky, Sergey, D'Onofrio, Monica, Dozen, Candan, Ezzat, Abdallah, Favre, Yannick, Fellers, Deion, Feng, Jonathan L, Ferrere, Didier, Gibson, Stephen, Gonzalez-Sevilla, Sergio, Gornushkin, Yuri, Gwilliam, Carl, Hsu, Shih-Chieh, Hu, Zhen, Iacobucci, Giuseppe, Inada, Tomohiro, Jakobsen, Sune, Kajomovitz, Enrique, Kling, Felix, Kose, Umut, Kuehn, Susanne, Lefebvre, Helena, Levinson, Lorne, Li, Ke, Liu, Jinfeng, Magliocca, Chiara, McFayden, Josh, Milanesio, Matteo, Meehan, Sam, Mladenov, Dimitar, Moretti, Theo, Munker, Magdalena, Nakamura, Mitsuhiro, Nakano, Toshiyuki, Nessi, Marzio, Neuhaus, Friedemann, Nevay, Laurie, Otono, Hidetoshi, Pandini, Carlo, Pang, Hao, Paolozzi, Lorenzo, Petersen, Brian, Pietropaolo, Francesco, Prim, Markus, Queitsch-Maitland, Michaela, Resnati, Filippo, Rizzi, Chiara, Rokujo, Hiroki, Ruiz-Choliz, Elisa, Salfeld-Nebgen, Jakob, Sato, Osamu, Scampoli, Paola, Schmieden, Kristof, Schott, Matthias, Sfyrla, Anna, Shively, Savannah, Spencer, John, Takubo, Yosuke, Tarannum, Noshin, Theiner, Ondrej, Torrence, Eric, Tufanli, Serhan, Vasina, Svetlana, Vormwald, Benedikt, and Wang, Di

Subjects
physics.ins-det, hep-ex
Abstract

FASER is a new experiment designed to search for new light weakly-interactinglong-lived particles (LLPs) and study high-energy neutrino interactions in thevery forward region of the LHC collisions at CERN. The experimental apparatusis situated 480 m downstream of the ATLAS interaction-point aligned with thebeam collision axis. The FASER detector includes four identical trackerstations constructed from silicon microstrip detectors. Three of the trackerstations form a tracking spectrometer, and enable FASER to detect the decayproducts of LLPs decaying inside the apparatus, whereas the fourth station isused for the neutrino analysis. The spectrometer has been installed in the LHCcomplex since March 2021, while the fourth station is not yet installed. FASERwill start physics data taking when the LHC resumes operation in early 2022.This paper describes the design, construction and testing of the trackingspectrometer, including the associated components such as the mechanics,readout electronics, power supplies and cooling system.

Published
2021

8. First neutrino interaction candidates at the LHC

Author

Abreu, Henso, Afik, Yoav, Antel, Claire, Arakawa, Jason, Ariga, Akitaka, Ariga, Tomoko, Bernlochner, Florian, Boeckh, Tobias, Boyd, Jamie, Brenner, Lydia, Cadoux, Franck, Casper, David W, Cavanagh, Charlotte, Cerutti, Francesco, Chen, Xin, Coccaro, Andrea, D’Onofrio, Monica, Dozen, Candan, Favre, Yannick, Fellers, Deion, Feng, Jonathan L, Ferrere, Didier, Gibson, Stephen, Gonzalez-Sevilla, Sergio, Gwilliam, Carl, Hsu, Shih-Chieh, Hu, Zhen, Iacobucci, Giuseppe, Inada, Tomohiro, Ismail, Ahmed, Jakobsen, Sune, Kajomovitz, Enrique, Kling, Felix, Kose, Umut, Kuehn, Susanne, Lefebvre, Helena, Levinson, Lorne, Li, Ke, Liu, Jinfeng, Magliocca, Chiara, McFayden, Josh, Meehan, Sam, Mladenov, Dimitar, Nakamura, Mitsuhiro, Nakano, Toshiyuki, Nessi, Marzio, Neuhaus, Friedemann, Nevay, Laurie, Otono, Hidetoshi, Pandini, Carlo, Pang, Hao, Paolozzi, Lorenzo, Petersen, Brian, Pietropaolo, Francesco, Prim, Markus, Queitsch-Maitland, Michaela, Resnati, Filippo, Rokujo, Hiroki, Sabaté-Gilarte, Marta, Salfeld-Nebgen, Jakob, Sato, Osamu, Scampoli, Paola, Schmieden, Kristof, Schott, Matthias, Sfyrla, Anna, Shively, Savannah, Spencer, John, Takubo, Yosuke, Theiner, Ondrej, Torrence, Eric, Trojanowski, Sebastian, Tufanli, Serhan, Vormwald, Benedikt, Wang, Di, and Zhang, Gang

Subjects
Nuclear and Plasma Physics, Particle and High Energy Physics, Physical Sciences, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Nuclear & Particles Physics, Mathematical physics, Astronomical sciences, Particle and high energy physics
Abstract

FASERν 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.

Published
2021

9. The tracking detector of the FASER experiment

Author

Abreu, Henso, Antel, Claire, Ariga, Akitaka, Ariga, Tomoko, Bernlochner, Florian, Boeckh, Tobias, Boyd, Jamie, Brenner, Lydia, Cadoux, Franck, Casper, David W., Cavanagh, Charlotte, Chen, Xin, Coccaro, Andrea, Crespo-Lopez, Olivier, Dmitrievsky, Sergey, D’Onofrio, Monica, Dozen, Candan, Ezzat, Abdallah, Favre, Yannick, Fellers, Deion, Feng, Jonathan L., Ferrere, Didier, Gibson, Stephen, Gonzalez-Sevilla, Sergio, Gornushkin, Yuri, Gwilliam, Carl, Hsu, Shih-Chieh, Hu, Zhen, Iacobucci, Giuseppe, Inada, Tomohiro, Jakobsen, Sune, Kajomovitz, Enrique, Kling, Felix, Kose, Umut, Kuehn, Susanne, Lefebvre, Helena, Levinson, Lorne, Li, Ke, Liu, Jinfeng, Magliocca, Chiara, McFayden, Josh, Milanesio, Matteo, Meehan, Sam, Mladenov, Dimitar, Moretti, Théo, Munker, Magdalena, Nakamura, Mitsuhiro, Nakano, Toshiyuki, Nessi, Marzio, Neuhaus, Friedemann, Nevay, Laurie, Otono, Hidetoshi, Pandini, Carlo, Pang, Hao, Paolozzi, Lorenzo, Petersen, Brian, Pietropaolo, Francesco, Prim, Markus, Queitsch-Maitland, Michaela, Resnati, Filippo, Rizzi, Chiara, Rokujo, Hiroki, Ruiz-Choliz, Elisa, Salfeld-Nebgen, Jakob, Sato, Osamu, Scampoli, Paola, Schmieden, Kristof, Schott, Matthias, Sfyrla, Anna, Shively, Savannah, Spencer, John, Takubo, Yosuke, Tarannum, Noshin, Theiner, Ondrej, Torrence, Eric, Tufanli, Serhan, Vasina, Svetlana, Vormwald, Benedikt, and Wang, Di

Published
2022
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10. Search for Dark Photons with the FASER detector at the LHC

Author

Abreu, Henso, primary, Anders, John, additional, Antel, Claire, additional, Ariga, Akitaka, additional, Ariga, Tomoko, additional, Atkinson, Jeremy, additional, Bernlochner, Florian U., additional, Boeckh, Tobias, additional, Boyd, Jamie, additional, Brenner, Lydia, additional, Cadoux, Franck, additional, Casper, David W., additional, Cavanagh, Charlotte, additional, Chen, Xin, additional, Coccaro, Andrea, additional, D'Onofrio, Monica, additional, Desai, Ansh, additional, Dmitrievsky, Sergey, additional, Dozen, Candan, additional, Favre, Yannick, additional, Fellers, Deion, additional, Feng, Jonathan L., additional, Fenoglio, Carlo Alberto, additional, Ferrere, Didier, additional, Galon, Iftah, additional, Gibson, Stephen, additional, Gonzalez-Sevilla, Sergio, additional, Gornushkin, Yuri, additional, Gwilliam, Carl, additional, Hayakawa, Daiki, additional, Hsu, Shih-Chieh, additional, Hu, Zhen, additional, Iacobucci, Giuseppe, additional, Inada, Tomohiro, additional, Jakobsen, Sune, additional, Joos, Hans, additional, Kajomovitz, Enrique, additional, Kawahara, Hiroaki, additional, Keyken, Alex, additional, Kling, Felix, additional, Köck, Daniela, additional, Kose, Umut, additional, Kotitsa, Rafaella, additional, Kuehn, Susanne, additional, Lefebvre, Helena, additional, Levinson, Lorne, additional, Li, Ke, additional, Liu, Jinfeng, additional, MacDonald, Jack, additional, Magliocca, Chiara, additional, Martinelli, Fulvio, additional, McFayden, Josh, additional, Meehan, Sam, additional, Milanesio, Matteo, additional, Moretti, Théo, additional, Munker, Magdalena, additional, Nakamura, Mitsuhiro, additional, Nakano, Toshiyuki, additional, Neuhaus, Friedemann, additional, Nevay, Laurie, additional, Ohashi, Ken, additional, Otono, Hidetoshi, additional, Pang, Hao, additional, Paolozzi, Lorenzo, additional, Petersen, Brian, additional, Prim, Markus, additional, Queitsch-Maitland, Michaela, additional, Rokujo, Hiroki, additional, Ruiz-Choliz, Elisa, additional, Sabater-Iglesias, Jorge, additional, Salfeld-Nebgen, Jakob, additional, Sato, Osamu, additional, Scampoli, Paola, additional, Schmieden, Kristof, additional, Schott, Matthias, additional, Sfyrla, Anna, additional, Shively, Savannah, additional, Takubo, Yosuke, additional, Tarannum, Noshin, additional, Theiner, Ondrej, additional, Torrence, Eric, additional, Trojanowski, Sebastian, additional, Vasina, Svetlana, additional, Vormwald, Benedikt, additional, Wang, Di, additional, Welch, Eli, additional, Zahorec, Samuel, additional, and Zambito, Stefano, additional

Published
2024
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11. First Measurement of ν_{e} and ν_{μ} Interaction Cross Sections at the LHC with FASER's Emulsion Detector.

Author

Abraham RM, Anders J, Antel C, Ariga A, Ariga T, Atkinson J, Bernlochner FU, Boeckh T, Boyd J, Brenner L, Burger A, Cadoux F, Cardella R, Casper DW, Cavanagh C, Chen X, Coccaro A, Débieux S, D'Onofrio M, Desai A, Dmitrievsky S, Eley S, Favre Y, Fellers D, Feng JL, Fenoglio CA, Ferrere D, Fieg M, Filali W, Fujimori H, Garabaglu A, Gibson S, Gonzalez-Sevilla S, Gornushkin Y, Gwilliam C, Hayakawa D, Hsu SC, Hu Z, Iacobucci G, Inada T, Iodice L, Jakobsen S, Joos H, Kajomovitz E, Kanai T, Kawahara H, Keyken A, Kling F, Köck D, Kontaxakis P, Kose U, Kotitsa R, Kuehn S, Kugathasan T, Lefebvre H, Levinson L, Li K, Liu J, Lutz MS, MacDonald J, Magliocca C, Martinelli F, McCoy L, McFayden J, Medina AP, Milanesio M, Moretti T, Munker M, Nakamura M, Nakano T, Neuhaus F, Nevay L, Nonaka M, Okui K, Ohashi K, Otono H, Pang H, Paolozzi L, Petersen B, Prim M, Queitsch-Maitland M, Rokujo H, Ruiz-Choliz E, Rubbia A, Sabater-Iglesias J, Sato O, Scampoli P, Schmieden K, Schott M, Sfyrla A, Shamim M, Shively S, Takubo Y, Tarannum N, Theiner O, Torrence E, Vasina S, Vormwald B, Wang D, Wang Y, Welch E, Zahorec S, Zambito S, and Zhang S

Abstract

The first results of the study of high-energy electron neutrino (ν_{e}) and muon neutrino (ν_{μ}) charged-current interactions in the FASERν emulsion-tungsten detector of the FASER experiment at the LHC are presented. A 128.8 kg subset of the FASERν volume was analyzed after exposure to 9.5  fb^{-1} of sqrt[s]=13.6  TeV pp data. Four (eight) ν_{e} (ν_{μ}) interaction candidate events are observed with a statistical significance of 5.2σ (5.7σ). This is the first direct observation of ν_{e} interactions at a particle collider and includes the highest-energy ν_{e} and ν_{μ} ever detected from an artificial source. The interaction cross section per nucleon σ/E_{ν} is measured over an energy range of 560-1740 GeV (520-1760 GeV) for ν_{e} (ν_{μ}) to be (1.2_{-0.7}^{+0.8})×10^{-38}  cm^{2} GeV^{-1} [(0.5±0.2)×10^{-38}  cm^{2} GeV^{-1}], consistent with standard model predictions. These are the first measurements of neutrino interaction cross sections in those energy ranges.

Published
2024
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12. First Direct Observation of Collider Neutrinos with FASER at the LHC.

Author

Abreu H, Anders J, Antel C, Ariga A, Ariga T, Atkinson J, Bernlochner FU, Blesgen T, Boeckh T, Boyd J, Brenner L, Cadoux F, Casper DW, Cavanagh C, Chen X, Coccaro A, Desai A, Dmitrievsky S, D'Onofrio M, Favre Y, Fellers D, Feng JL, Fenoglio CA, Ferrere D, Gibson S, Gonzalez-Sevilla S, Gornushkin Y, Gwilliam C, Hayakawa D, Hsu SC, Hu Z, Iacobucci G, Inada T, Jakobsen S, Joos H, Kajomovitz E, Kawahara H, Keyken A, Kling F, Köck D, Kose U, Kotitsa R, Kuehn S, Lefebvre H, Levinson L, Li K, Liu J, MacDonald J, Magliocca C, Martinelli F, McFayden J, Milanesio M, Mladenov D, Moretti T, Munker M, Nakamura M, Nakano T, Nessi M, Neuhaus F, Nevay L, Otono H, Pang H, Paolozzi L, Petersen B, Pietropaolo F, Prim M, Queitsch-Maitland M, Resnati F, Rokujo H, Ruiz-Choliz E, Sabater-Iglesias J, Sato O, Scampoli P, Schmieden K, Schott M, Sfyrla A, Shively S, Takubo Y, Tarannum N, Theiner O, Torrence E, Tufanli S, Vasina S, Vormwald B, Wang D, Welch E, and Zambito S

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.

Published
2023
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