The forward physics facility: Physics opportunities and conceptual design

Luis A. Anchordoqui; John Kenneth Anders; Akitaka Ariga; Tomoko Ariga; David Asner; Jeremy Atkinson; Alan J. Barr; Larry Bartoszek; Brian Batell; Hans Peter Beck; Florian U. Bernlochner; Bipul Bhuyan; Jianming Bian; Aleksey Bolotnikov; Silas Bosco; Jamie Boyd; Nick Callaghan; Gabriella Carini; Michael Carrigan; Kohei Chinone; Matthew Citron; Isabella Coronado; Peter Denton; Albert De Roeck; Milind V. Diwan; Sergey Dmitrievsky; Radu Dobre; Monica D’Onofrio; Jonathan L. Feng; Max Fieg; Elena Firu; Reinaldo Francener; Haruhi Fujimori; Frank Golf; Yury Gornushkin; Kranti Gunthoti; Claire Gwenlan; Carl Gwilliam; Andrew Haas; Elie Hammou; Daiki Hayakawa; Christopher S. Hill; Dariush Imani; Tomohiro Inada; Sune Jakobsen; Yu Seon Jeong; Kevin J. Kelly; Samantha Kelly; Luke Kennedy; Felix Kling; Umut Kose; Peter Krack; Jinmian Li; Yichen Li; Steven Linden; Ming Liu; Kristin Lohwasser; Adam Lowe; Steven Lowette; Toni Mäkelä; Roshan Mammen Abraham; Christopher Mauger; Konstantinos Mavrokoridis; Josh Mcfayden; Hiroaki Menjo; Connor Miraval; Keiko Moriyama; Toshiyuki Nakano; Ken Ohashi; Toranosuke Okumura; Hidetoshi Otono; Vittorio Paolone; Saba Parsa; Junle Pei; Michaela Queitsch-Maitland; Mary Hall Reno; Sergio Rescia; Filippo Resnati; Adam Roberts; Juan Rojo; Hiroki Rokujo; Olivier Salin; Jack Sander; Sai Neha Santpur; Osamu Sato; Paola Scampoli; Ryan Schmitz; Matthias Schott; Anna Sfyrla; Dennis Soldin; Albert Sotnikov; Anna Stasto; George Stavrakis; Jacob Steenis; David Stuart; Juan Salvador Tafoya Vargas; Yosuke Takubo; Simon Thor; Sebastian Trojanowski; Yu Dai Tsai; Serhan Tufanli; Svetlana Vasina; Matteo Vicenzi; Iacopo Vivarelli; Nenad Vranjes; Marija Vranjes Milosavljevic; Kazuhiro Watanabe; Michele Weber; Benjamin Wilson; Wenjie Wu; Tiepolo Wybouw; Kin Yip; Jaehyeok Yoo; Jonghee Yoo

doi:10.1016/j.nuclphysb.2026.117398

The forward physics facility: Physics opportunities and conceptual design

Luis A. Anchordoqui
, John Kenneth Anders
, Akitaka Ariga
, Tomoko Ariga
, David Asner
, Jeremy Atkinson
, Alan J. Barr
, Larry Bartoszek
, Brian Batell
, Hans Peter Beck
, Florian U. Bernlochner
, Bipul Bhuyan
, Jianming Bian
, Aleksey Bolotnikov
, Silas Bosco
, Jamie Boyd^*
, Nick Callaghan
, Gabriella Carini
, Michael Carrigan
, Kohei Chinone

Matthew Citron, Isabella Coronado, Peter Denton, Albert De Roeck, Milind V. Diwan, Sergey Dmitrievsky, Radu Dobre, Monica D’Onofrio, Jonathan L. Feng, Max Fieg, Elena Firu, Reinaldo Francener, Haruhi Fujimori, Frank Golf, Yury Gornushkin, Kranti Gunthoti, Claire Gwenlan, Carl Gwilliam, Andrew Haas, Elie Hammou, Daiki Hayakawa, Christopher S. Hill, Dariush Imani, Tomohiro Inada, Sune Jakobsen, Yu Seon Jeong, Kevin J. Kelly, Samantha Kelly, Luke Kennedy, Felix Kling, Umut Kose, Peter Krack, Jinmian Li, Yichen Li, Steven Linden, Ming Liu, Kristin Lohwasser, Adam Lowe, Steven Lowette, Toni Mäkelä, Roshan Mammen Abraham, Christopher Mauger, Konstantinos Mavrokoridis, Josh Mcfayden, Hiroaki Menjo, Connor Miraval, Keiko Moriyama, Toshiyuki Nakano, Ken Ohashi, Toranosuke Okumura, Hidetoshi Otono, Vittorio Paolone, Saba Parsa, Junle Pei, Michaela Queitsch-Maitland, Mary Hall Reno, Sergio Rescia, Filippo Resnati, Adam Roberts, Juan Rojo, Hiroki Rokujo, Olivier Salin, Jack Sander, Sai Neha Santpur, Osamu Sato, Paola Scampoli, Ryan Schmitz, Matthias Schott, Anna Sfyrla, Dennis Soldin, Albert Sotnikov, Anna Stasto, George Stavrakis, Jacob Steenis, David Stuart, Juan Salvador Tafoya Vargas, Yosuke Takubo, Simon Thor, Sebastian Trojanowski, Yu Dai Tsai, Serhan Tufanli, Svetlana Vasina, Matteo Vicenzi, Iacopo Vivarelli, Nenad Vranjes, Marija Vranjes Milosavljevic, Kazuhiro Watanabe, Michele Weber, Benjamin Wilson, Wenjie Wu, Tiepolo Wybouw, Kin Yip, Jaehyeok Yoo, Jonghee Yoo

^*Corresponding author for this work

Research output: Contribution to Journal › Review article › Academic › peer-review

Abstract

The Forward Physics Facility (FPF) is a proposed extension of the HL-LHC program designed to exploit the unique scientific opportunities offered by the intense flux of high energy neutrinos, and possibly new particles, in the far-forward direction. Located in a well-shielded cavern 627 m downstream of one of the LHC interaction points, the facility will support a broad and ambitious physics program that significantly expands the discovery potential of the HL-LHC. Equipped with four complementary detectors—FLArE, FASER ν 2, FASER2, and FORMOSA—the FPF will enable breakthrough measurements that will advance our understanding of neutrino physics, quantum chromodynamics, and astroparticle physics, and will search for dark matter and other new particles. With this Letter of Intent, we propose the construction of the FPF cavern and the construction, integration, and installation of its experiments. We summarize the physics case, the facility design, the layout and components of the detectors, as well as the envisioned collaboration structure, cost estimate, and implementation timeline.

Original language	English
Article number	117398
Pages (from-to)	1-73
Number of pages	73
Journal	Nuclear Physics B
Volume	1026
Early online date	17 Mar 2026
DOIs	https://doi.org/10.1016/j.nuclphysb.2026.117398
Publication status	Published - May 2026

Bibliographical note

Publisher Copyright:
Copyright © 2026. Published by Elsevier B.V.

Funding

The work of L.A. Anchordoqui is supported by the U.S. National Science Foundation grant PHY-2412679. The work of A.J. Barr is funded in part through STFC grants ST/R002444/1 and ST/S000933/1, and through research funded by the John Fell Oxford University Press Research Fund. The work of B. Batell is supported by U.S. Department of Energy grant DE-SC-0007914. The work of J. Bian, M.V. Diwan, S. Linden, M. Vicenzi, and W. Wu is supported in part by Heising-Simons Foundation Grant 2022–3319. The work of M. Citron is supported in part by U.S. Department of Energy grant DE-SC0009999. I. Coronado and D. Soldin acknowledge the support and resources from the Center for High Performance Computing at the University of Utah. I. Coronado is also supported by the Summer Undergraduate Research Fellowship Program at the Department of Physics & Astronomy at the University of Utah. The work of J.L. Feng, M. Fieg, F. Kling, R.M. Abraham, and T. Mäkelä is supported in part by U.S. National Science Foundation grants PHY-2111427, PHY-2210283, and PHY-2514888. The work of J.L. Feng is supported in part by Simons Investigator Award #376204, Heising-Simons Foundation Grants 2019-1179 and 2020-1840, and Simons Foundation Grant 623683. The work of R. Francener is supported by Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq, Brazil), Grant 161770/2022-3. The work of E. Hammou is supported by the European Research Council under the European Union’s Horizon 2020 research and innovation Programme (grant agreement n.950246), and partially by the STFC consolidated grant ST/T000694/1 and ST/X000664/1. The work of C.S. Hill is supported in part by U.S. Department of Energy Grant DE-SC0011726. The work of Y.S. Jeong is supported in part by the National Research Foundation of Korea (NRF) grant funded by the Korea government through Ministry of Science and ICT Grant No. RS-2025-00555834. The work of F. Kling is supported in part by the Deutsche Forschungsgemeinschaft under Germany’s Excellence Strategy – EXC 2121 Quantum Universe – 390833306. The work of J. McFayden is supported by the Royal Society grant URF\R1\201519 and STFC grant ST/W000512/1. The work of J. Rojo is partially supported by NWO, the Dutch Research Council, and by the Netherlands eScience Center (NLeSC). The work of S. Trojanowski is supported by the National Science Centre, Poland, research grant No. 2021/42/E/ST2/00031. The work of K. Watanabe is supported by JSPS KAKENHI Grant No. JP25K07286. The work at BNL is under U.S. Department of Energy contract No. DE-SC-0012704.

Funders	Funder number
National Research Foundation of Korea
Nederlandse Organisatie voor Wetenschappelijk Onderzoek
Oxford University Press
European Research Council
Netherlands eScience Center
Ministry of Science and ICT, South Korea	RS-2025-00555834
Narodowe Centrum Nauki	2021/42/E/ST2/00031
National Science Foundation	PHY-2412679
Science and Technology Facilities Council	ST/S000933/1, ST/R002444/1
Japan Society for the Promotion of Science	DE-SC-0012704, JP25K07286
Conselho Nacional de Desenvolvimento Científico e Tecnológico	161770/2022-3
Horizon 2020 Framework Programme	ST/X000664/1, 950246, DE-SC0011726, ST/T000694/1
Deutsche Forschungsgemeinschaft	390833306
University of Utah	PHY-2210283, 2020-1840, PHY-2111427, 376204, PHY-2514888, 2019-1179
Heising-Simons Foundation	DE-SC0009999, 2022–3319
U.S. Department of Energy	DE-SC-0007914
Royal Society	URF\R1\201519, ST/W000512/1
Simons Foundation	623683

Keywords

Astroparticle physics
Dark matter
Experimental design
Large hadron collider
Neutrinos
Parton distribution functions
QCD

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10.1016/j.nuclphysb.2026.117398

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Cite this

Anchordoqui, L. A., Anders, J. K., Ariga, A., Ariga, T., Asner, D., Atkinson, J., Barr, A. J., Bartoszek, L., Batell, B., Beck, H. P., Bernlochner, F. U., Bhuyan, B., Bian, J., Bolotnikov, A., Bosco, S., Boyd, J., Callaghan, N., Carini, G., Carrigan, M., ... Yoo, J. (2026). The forward physics facility: Physics opportunities and conceptual design. Nuclear Physics B, 1026, 1-73. Article 117398. https://doi.org/10.1016/j.nuclphysb.2026.117398

@article{e24e0e274a5e4d5fb1afe77c4de48864,

title = "The forward physics facility: Physics opportunities and conceptual design",

abstract = "The Forward Physics Facility (FPF) is a proposed extension of the HL-LHC program designed to exploit the unique scientific opportunities offered by the intense flux of high energy neutrinos, and possibly new particles, in the far-forward direction. Located in a well-shielded cavern 627 m downstream of one of the LHC interaction points, the facility will support a broad and ambitious physics program that significantly expands the discovery potential of the HL-LHC. Equipped with four complementary detectors—FLArE, FASER ν 2, FASER2, and FORMOSA—the FPF will enable breakthrough measurements that will advance our understanding of neutrino physics, quantum chromodynamics, and astroparticle physics, and will search for dark matter and other new particles. With this Letter of Intent, we propose the construction of the FPF cavern and the construction, integration, and installation of its experiments. We summarize the physics case, the facility design, the layout and components of the detectors, as well as the envisioned collaboration structure, cost estimate, and implementation timeline.",

keywords = "Astroparticle physics, Dark matter, Experimental design, Large hadron collider, Neutrinos, Parton distribution functions, QCD",

author = "Anchordoqui, \{Luis A.\} and Anders, \{John Kenneth\} and Akitaka Ariga and Tomoko Ariga and David Asner and Jeremy Atkinson and Barr, \{Alan J.\} and Larry Bartoszek and Brian Batell and Beck, \{Hans Peter\} and Bernlochner, \{Florian U.\} and Bipul Bhuyan and Jianming Bian and Aleksey Bolotnikov and Silas Bosco and Jamie Boyd and Nick Callaghan and Gabriella Carini and Michael Carrigan and Kohei Chinone and Matthew Citron and Isabella Coronado and Peter Denton and \{De Roeck\}, Albert and Diwan, \{Milind V.\} and Sergey Dmitrievsky and Radu Dobre and Monica D{\textquoteright}Onofrio and Feng, \{Jonathan L.\} and Max Fieg and Elena Firu and Reinaldo Francener and Haruhi Fujimori and Frank Golf and Yury Gornushkin and Kranti Gunthoti and Claire Gwenlan and Carl Gwilliam and Andrew Haas and Elie Hammou and Daiki Hayakawa and Hill, \{Christopher S.\} and Dariush Imani and Tomohiro Inada and Sune Jakobsen and Jeong, \{Yu Seon\} and Kelly, \{Kevin J.\} and Samantha Kelly and Luke Kennedy and Felix Kling and Umut Kose and Peter Krack and Jinmian Li and Yichen Li and Steven Linden and Ming Liu and Kristin Lohwasser and Adam Lowe and Steven Lowette and Toni M{\"a}kel{\"a} and Abraham, \{Roshan Mammen\} and Christopher Mauger and Konstantinos Mavrokoridis and Josh Mcfayden and Hiroaki Menjo and Connor Miraval and Keiko Moriyama and Toshiyuki Nakano and Ken Ohashi and Toranosuke Okumura and Hidetoshi Otono and Vittorio Paolone and Saba Parsa and Junle Pei and Michaela Queitsch-Maitland and Reno, \{Mary Hall\} and Sergio Rescia and Filippo Resnati and Adam Roberts and Juan Rojo and Hiroki Rokujo and Olivier Salin and Jack Sander and Santpur, \{Sai Neha\} and Osamu Sato and Paola Scampoli and Ryan Schmitz and Matthias Schott and Anna Sfyrla and Dennis Soldin and Albert Sotnikov and Anna Stasto and George Stavrakis and Jacob Steenis and David Stuart and Vargas, \{Juan Salvador Tafoya\} and Yosuke Takubo and Simon Thor and Sebastian Trojanowski and \{Dai Tsai\}, Yu and Serhan Tufanli and Svetlana Vasina and Matteo Vicenzi and Iacopo Vivarelli and Nenad Vranjes and Milosavljevic, \{Marija Vranjes\} and Kazuhiro Watanabe and Michele Weber and Benjamin Wilson and Wenjie Wu and Tiepolo Wybouw and Kin Yip and Jaehyeok Yoo and Jonghee Yoo",

note = "Publisher Copyright: Copyright {\textcopyright} 2026. Published by Elsevier B.V.",

year = "2026",

month = may,

doi = "10.1016/j.nuclphysb.2026.117398",

language = "English",

volume = "1026",

pages = "1--73",

journal = "Nuclear Physics B",

issn = "0550-3213",

publisher = "Elsevier B.V.",

}

Anchordoqui, LA, Anders, JK, Ariga, A, Ariga, T, Asner, D, Atkinson, J, Barr, AJ, Bartoszek, L, Batell, B, Beck, HP, Bernlochner, FU, Bhuyan, B, Bian, J, Bolotnikov, A, Bosco, S, Boyd, J, Callaghan, N, Carini, G, Carrigan, M, Chinone, K, Citron, M, Coronado, I, Denton, P, De Roeck, A, Diwan, MV, Dmitrievsky, S, Dobre, R, D’Onofrio, M, Feng, JL, Fieg, M, Firu, E, Francener, R, Fujimori, H, Golf, F, Gornushkin, Y, Gunthoti, K, Gwenlan, C, Gwilliam, C, Haas, A, Hammou, E, Hayakawa, D, Hill, CS, Imani, D, Inada, T, Jakobsen, S, Jeong, YS, Kelly, KJ, Kelly, S, Kennedy, L, Kling, F, Kose, U, Krack, P, Li, J, Li, Y, Linden, S, Liu, M, Lohwasser, K, Lowe, A, Lowette, S, Mäkelä, T, Abraham, RM, Mauger, C, Mavrokoridis, K, Mcfayden, J, Menjo, H, Miraval, C, Moriyama, K, Nakano, T, Ohashi, K, Okumura, T, Otono, H, Paolone, V, Parsa, S, Pei, J, Queitsch-Maitland, M, Reno, MH, Rescia, S, Resnati, F, Roberts, A, Rojo, J, Rokujo, H, Salin, O, Sander, J, Santpur, SN, Sato, O, Scampoli, P, Schmitz, R, Schott, M, Sfyrla, A, Soldin, D, Sotnikov, A, Stasto, A, Stavrakis, G, Steenis, J, Stuart, D, Vargas, JST, Takubo, Y, Thor, S, Trojanowski, S, Dai Tsai, Y, Tufanli, S, Vasina, S, Vicenzi, M, Vivarelli, I, Vranjes, N, Milosavljevic, MV, Watanabe, K, Weber, M, Wilson, B, Wu, W, Wybouw, T, Yip, K, Yoo, J & Yoo, J 2026, 'The forward physics facility: Physics opportunities and conceptual design', Nuclear Physics B, vol. 1026, 117398, pp. 1-73. https://doi.org/10.1016/j.nuclphysb.2026.117398

TY - JOUR

T1 - The forward physics facility

T2 - Physics opportunities and conceptual design

AU - Anchordoqui, Luis A.

AU - Anders, John Kenneth

AU - Ariga, Akitaka

AU - Ariga, Tomoko

AU - Asner, David

AU - Atkinson, Jeremy

AU - Barr, Alan J.

AU - Bartoszek, Larry

AU - Batell, Brian

AU - Beck, Hans Peter

AU - Bernlochner, Florian U.

AU - Bhuyan, Bipul

AU - Bian, Jianming

AU - Bolotnikov, Aleksey

AU - Bosco, Silas

AU - Boyd, Jamie

AU - Callaghan, Nick

AU - Carini, Gabriella

AU - Carrigan, Michael

AU - Chinone, Kohei

AU - Citron, Matthew

AU - Coronado, Isabella

AU - Denton, Peter

AU - De Roeck, Albert

AU - Diwan, Milind V.

AU - Dmitrievsky, Sergey

AU - Dobre, Radu

AU - D’Onofrio, Monica

AU - Feng, Jonathan L.

AU - Fieg, Max

AU - Firu, Elena

AU - Francener, Reinaldo

AU - Fujimori, Haruhi

AU - Golf, Frank

AU - Gornushkin, Yury

AU - Gunthoti, Kranti

AU - Gwenlan, Claire

AU - Gwilliam, Carl

AU - Haas, Andrew

AU - Hammou, Elie

AU - Hayakawa, Daiki

AU - Hill, Christopher S.

AU - Imani, Dariush

AU - Inada, Tomohiro

AU - Jakobsen, Sune

AU - Jeong, Yu Seon

AU - Kelly, Kevin J.

AU - Kelly, Samantha

AU - Kennedy, Luke

AU - Kling, Felix

AU - Kose, Umut

AU - Krack, Peter

AU - Li, Jinmian

AU - Li, Yichen

AU - Linden, Steven

AU - Liu, Ming

AU - Lohwasser, Kristin

AU - Lowe, Adam

AU - Lowette, Steven

AU - Mäkelä, Toni

AU - Abraham, Roshan Mammen

AU - Mauger, Christopher

AU - Mavrokoridis, Konstantinos

AU - Mcfayden, Josh

AU - Menjo, Hiroaki

AU - Miraval, Connor

AU - Moriyama, Keiko

AU - Nakano, Toshiyuki

AU - Ohashi, Ken

AU - Okumura, Toranosuke

AU - Otono, Hidetoshi

AU - Paolone, Vittorio

AU - Parsa, Saba

AU - Pei, Junle

AU - Queitsch-Maitland, Michaela

AU - Reno, Mary Hall

AU - Rescia, Sergio

AU - Resnati, Filippo

AU - Roberts, Adam

AU - Rojo, Juan

AU - Rokujo, Hiroki

AU - Salin, Olivier

AU - Sander, Jack

AU - Santpur, Sai Neha

AU - Sato, Osamu

AU - Scampoli, Paola

AU - Schmitz, Ryan

AU - Schott, Matthias

AU - Sfyrla, Anna

AU - Soldin, Dennis

AU - Sotnikov, Albert

AU - Stasto, Anna

AU - Stavrakis, George

AU - Steenis, Jacob

AU - Stuart, David

AU - Vargas, Juan Salvador Tafoya

AU - Takubo, Yosuke

AU - Thor, Simon

AU - Trojanowski, Sebastian

AU - Dai Tsai, Yu

AU - Tufanli, Serhan

AU - Vasina, Svetlana

AU - Vicenzi, Matteo

AU - Vivarelli, Iacopo

AU - Vranjes, Nenad

AU - Milosavljevic, Marija Vranjes

AU - Watanabe, Kazuhiro

AU - Weber, Michele

AU - Wilson, Benjamin

AU - Wu, Wenjie

AU - Wybouw, Tiepolo

AU - Yip, Kin

AU - Yoo, Jaehyeok

AU - Yoo, Jonghee

PY - 2026/5

Y1 - 2026/5

N2 - The Forward Physics Facility (FPF) is a proposed extension of the HL-LHC program designed to exploit the unique scientific opportunities offered by the intense flux of high energy neutrinos, and possibly new particles, in the far-forward direction. Located in a well-shielded cavern 627 m downstream of one of the LHC interaction points, the facility will support a broad and ambitious physics program that significantly expands the discovery potential of the HL-LHC. Equipped with four complementary detectors—FLArE, FASER ν 2, FASER2, and FORMOSA—the FPF will enable breakthrough measurements that will advance our understanding of neutrino physics, quantum chromodynamics, and astroparticle physics, and will search for dark matter and other new particles. With this Letter of Intent, we propose the construction of the FPF cavern and the construction, integration, and installation of its experiments. We summarize the physics case, the facility design, the layout and components of the detectors, as well as the envisioned collaboration structure, cost estimate, and implementation timeline.

AB - The Forward Physics Facility (FPF) is a proposed extension of the HL-LHC program designed to exploit the unique scientific opportunities offered by the intense flux of high energy neutrinos, and possibly new particles, in the far-forward direction. Located in a well-shielded cavern 627 m downstream of one of the LHC interaction points, the facility will support a broad and ambitious physics program that significantly expands the discovery potential of the HL-LHC. Equipped with four complementary detectors—FLArE, FASER ν 2, FASER2, and FORMOSA—the FPF will enable breakthrough measurements that will advance our understanding of neutrino physics, quantum chromodynamics, and astroparticle physics, and will search for dark matter and other new particles. With this Letter of Intent, we propose the construction of the FPF cavern and the construction, integration, and installation of its experiments. We summarize the physics case, the facility design, the layout and components of the detectors, as well as the envisioned collaboration structure, cost estimate, and implementation timeline.

KW - Astroparticle physics

KW - Dark matter

KW - Experimental design

KW - Large hadron collider

KW - Neutrinos

KW - Parton distribution functions

KW - QCD

UR - https://www.scopus.com/pages/publications/105036028854

UR - https://www.scopus.com/pages/publications/105036028854#tab=citedBy

U2 - 10.1016/j.nuclphysb.2026.117398

DO - 10.1016/j.nuclphysb.2026.117398

M3 - Review article

AN - SCOPUS:105036028854

SN - 0550-3213

VL - 1026

SP - 1

EP - 73

JO - Nuclear Physics B

JF - Nuclear Physics B

M1 - 117398

ER -

The forward physics facility: Physics opportunities and conceptual design

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