Momentum Measurement of Charged Particles in FASER's Emulsion Detector at the LHC
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| Format: | Preprint |
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2026
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| author | FASER Collaboration Abraham, Roshan Mammen Ai, Xiaocong Monsalve, Saul Alonso Anders, John Anderson, Emma Kate Antel, Claire Ariga, Akitaka Ariga, Tomoko Atkinson, Jeremy Bernlochner, Florian U. Boeckh, Tobias Bornand, Eliot Boyd, Jamie Brenner, Lydia Burger, Angela Cadoux, Franck Cardella, Roberto Casper, David W. Cavanagh, Charlotte Chen, Shiyang Chen, Xin Cheng, Xing Chinone, Kohei Chouhan, Dhruv Coccaro, Andrea Débieux, Stephane Desai, Ansh Dmitrievsky, Sergey Dobre, Radu D'Onofrio, Monica Eley, Sinead Favre, Yannick Feng, Jonathan L. Fenoglio, Carlo Alberto Ferrere, Didier Fieg, Max Filali, Wissal Firu, Elena Fujimori, Haruhi Galantay, Edward Garabaglu, Ali Gibson, Stephen Gonzalez-Sevilla, Sergio Gornushkin, Yuri Granov, Yotam Gu, Jinjing Gwilliam, Carl Hammou, Elie Hayakawa, Daiki Holzbock, Michael Hsu, Shih-Chieh Hu, Zhen Iacobucci, Giuseppe Inada, Tomohiro Iodice, Luca Jakobsen, Sune Jesus-Valls, Cesar Jofrehei, Arash Joos, Hans Kajomovitz, Enrique Kanai, Takumi Kawahara, Hiroaki Keyken, Alex Kling, Felix Köck, Daniela Kontaxakis, Pantelis Koorn, Jelle Kose, Umut Krack, Peter Kuehn, Susanne Kugathasan, Thanushan Laudage, Sebastian Levinson, Lorne Li, Botao Liu, Jinfeng Liu, Yi Lutz, Margaret S. MacDonald, Jack Mahlstedt, Joern Mäkelä, Toni Mascellani, Anna McCoy, Lawson McFayden, Josh Medina, Andrea Pizarro Moretti, Théo Moriyama, Keiko Nakano, Toshiyuki Nevay, Laurie Nonaka, Motoya Ohara, Yuma Ohashi, Ken Okui, Kazuaki Otono, Hidetoshi Paolozzi, Lorenzo Parry, Annabelle Pawan, Pawan Petersen, Brian Preda, Titi Prim, Markus Qin, Junkai Queitsch-Maitland, Michaela Rojo, Juan Rokujo, Hiroki Rubbia, André Sato, Osamu Scampoli, Paola Schmieden, Kristof Schott, Matthias Sebastiani, Cristiano Sfyrla, Anna Sgalaberna, Davide Shamim, Mansoora Takubo, Yosuke Tarannum, Noshin Thor, Simon Torrence, Eric Martinez, Oscar Ivan Valdes Vasina, Svetlana Vormwald, Benedikt Wang, Chi Wang, Yuxiao Welch, Eli White, Aaron Wielers, Monika Wilson, Benjamin James Xu, Yue Yang, Heng Yao, Lekai Yoshikawa, Daichi Zambito, Stefano Zhang, Shunliang Zhang, Yuxuan Zhao, Xingyu Zhao, Zijian |
| author_facet | FASER Collaboration Abraham, Roshan Mammen Ai, Xiaocong Monsalve, Saul Alonso Anders, John Anderson, Emma Kate Antel, Claire Ariga, Akitaka Ariga, Tomoko Atkinson, Jeremy Bernlochner, Florian U. Boeckh, Tobias Bornand, Eliot Boyd, Jamie Brenner, Lydia Burger, Angela Cadoux, Franck Cardella, Roberto Casper, David W. Cavanagh, Charlotte Chen, Shiyang Chen, Xin Cheng, Xing Chinone, Kohei Chouhan, Dhruv Coccaro, Andrea Débieux, Stephane Desai, Ansh Dmitrievsky, Sergey Dobre, Radu D'Onofrio, Monica Eley, Sinead Favre, Yannick Feng, Jonathan L. Fenoglio, Carlo Alberto Ferrere, Didier Fieg, Max Filali, Wissal Firu, Elena Fujimori, Haruhi Galantay, Edward Garabaglu, Ali Gibson, Stephen Gonzalez-Sevilla, Sergio Gornushkin, Yuri Granov, Yotam Gu, Jinjing Gwilliam, Carl Hammou, Elie Hayakawa, Daiki Holzbock, Michael Hsu, Shih-Chieh Hu, Zhen Iacobucci, Giuseppe Inada, Tomohiro Iodice, Luca Jakobsen, Sune Jesus-Valls, Cesar Jofrehei, Arash Joos, Hans Kajomovitz, Enrique Kanai, Takumi Kawahara, Hiroaki Keyken, Alex Kling, Felix Köck, Daniela Kontaxakis, Pantelis Koorn, Jelle Kose, Umut Krack, Peter Kuehn, Susanne Kugathasan, Thanushan Laudage, Sebastian Levinson, Lorne Li, Botao Liu, Jinfeng Liu, Yi Lutz, Margaret S. MacDonald, Jack Mahlstedt, Joern Mäkelä, Toni Mascellani, Anna McCoy, Lawson McFayden, Josh Medina, Andrea Pizarro Moretti, Théo Moriyama, Keiko Nakano, Toshiyuki Nevay, Laurie Nonaka, Motoya Ohara, Yuma Ohashi, Ken Okui, Kazuaki Otono, Hidetoshi Paolozzi, Lorenzo Parry, Annabelle Pawan, Pawan Petersen, Brian Preda, Titi Prim, Markus Qin, Junkai Queitsch-Maitland, Michaela Rojo, Juan Rokujo, Hiroki Rubbia, André Sato, Osamu Scampoli, Paola Schmieden, Kristof Schott, Matthias Sebastiani, Cristiano Sfyrla, Anna Sgalaberna, Davide Shamim, Mansoora Takubo, Yosuke Tarannum, Noshin Thor, Simon Torrence, Eric Martinez, Oscar Ivan Valdes Vasina, Svetlana Vormwald, Benedikt Wang, Chi Wang, Yuxiao Welch, Eli White, Aaron Wielers, Monika Wilson, Benjamin James Xu, Yue Yang, Heng Yao, Lekai Yoshikawa, Daichi Zambito, Stefano Zhang, Shunliang Zhang, Yuxuan Zhao, Xingyu Zhao, Zijian |
| contents | We present a momentum measurement method based on multiple Coulomb scattering (MCS) in the FASER$ν$ emulsion detector. The measurement of charged-particle momenta is essential for studying neutrino interactions in the TeV energy range at the FASER experiment. This method exploits the sub-micron spatial resolution and long tracking length of the FASER$ν$ detector, enabling momentum determination from a few GeV up to a few TeV. The performance was evaluated using Geant4-based Monte Carlo simulations and validated with muon test beam data in the momentum range 100-300 GeV. As a first probe of the method for higher momentum muons, background muons recorded by the FASER$ν$ detector were examined, showing reconstructed momenta consistent with expectations from their angular spread. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2602_17575 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Momentum Measurement of Charged Particles in FASER's Emulsion Detector at the LHC FASER Collaboration Abraham, Roshan Mammen Ai, Xiaocong Monsalve, Saul Alonso Anders, John Anderson, Emma Kate Antel, Claire Ariga, Akitaka Ariga, Tomoko Atkinson, Jeremy Bernlochner, Florian U. Boeckh, Tobias Bornand, Eliot Boyd, Jamie Brenner, Lydia Burger, Angela Cadoux, Franck Cardella, Roberto Casper, David W. Cavanagh, Charlotte Chen, Shiyang Chen, Xin Cheng, Xing Chinone, Kohei Chouhan, Dhruv Coccaro, Andrea Débieux, Stephane Desai, Ansh Dmitrievsky, Sergey Dobre, Radu D'Onofrio, Monica Eley, Sinead Favre, Yannick Feng, Jonathan L. Fenoglio, Carlo Alberto Ferrere, Didier Fieg, Max Filali, Wissal Firu, Elena Fujimori, Haruhi Galantay, Edward Garabaglu, Ali Gibson, Stephen Gonzalez-Sevilla, Sergio Gornushkin, Yuri Granov, Yotam Gu, Jinjing Gwilliam, Carl Hammou, Elie Hayakawa, Daiki Holzbock, Michael Hsu, Shih-Chieh Hu, Zhen Iacobucci, Giuseppe Inada, Tomohiro Iodice, Luca Jakobsen, Sune Jesus-Valls, Cesar Jofrehei, Arash Joos, Hans Kajomovitz, Enrique Kanai, Takumi Kawahara, Hiroaki Keyken, Alex Kling, Felix Köck, Daniela Kontaxakis, Pantelis Koorn, Jelle Kose, Umut Krack, Peter Kuehn, Susanne Kugathasan, Thanushan Laudage, Sebastian Levinson, Lorne Li, Botao Liu, Jinfeng Liu, Yi Lutz, Margaret S. MacDonald, Jack Mahlstedt, Joern Mäkelä, Toni Mascellani, Anna McCoy, Lawson McFayden, Josh Medina, Andrea Pizarro Moretti, Théo Moriyama, Keiko Nakano, Toshiyuki Nevay, Laurie Nonaka, Motoya Ohara, Yuma Ohashi, Ken Okui, Kazuaki Otono, Hidetoshi Paolozzi, Lorenzo Parry, Annabelle Pawan, Pawan Petersen, Brian Preda, Titi Prim, Markus Qin, Junkai Queitsch-Maitland, Michaela Rojo, Juan Rokujo, Hiroki Rubbia, André Sato, Osamu Scampoli, Paola Schmieden, Kristof Schott, Matthias Sebastiani, Cristiano Sfyrla, Anna Sgalaberna, Davide Shamim, Mansoora Takubo, Yosuke Tarannum, Noshin Thor, Simon Torrence, Eric Martinez, Oscar Ivan Valdes Vasina, Svetlana Vormwald, Benedikt Wang, Chi Wang, Yuxiao Welch, Eli White, Aaron Wielers, Monika Wilson, Benjamin James Xu, Yue Yang, Heng Yao, Lekai Yoshikawa, Daichi Zambito, Stefano Zhang, Shunliang Zhang, Yuxuan Zhao, Xingyu Zhao, Zijian Instrumentation and Detectors High Energy Physics - Experiment We present a momentum measurement method based on multiple Coulomb scattering (MCS) in the FASER$ν$ emulsion detector. The measurement of charged-particle momenta is essential for studying neutrino interactions in the TeV energy range at the FASER experiment. This method exploits the sub-micron spatial resolution and long tracking length of the FASER$ν$ detector, enabling momentum determination from a few GeV up to a few TeV. The performance was evaluated using Geant4-based Monte Carlo simulations and validated with muon test beam data in the momentum range 100-300 GeV. As a first probe of the method for higher momentum muons, background muons recorded by the FASER$ν$ detector were examined, showing reconstructed momenta consistent with expectations from their angular spread. |
| title | Momentum Measurement of Charged Particles in FASER's Emulsion Detector at the LHC |
| topic | Instrumentation and Detectors High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2602.17575 |