Letter of Intent: The Forward Physics Facility
hep-ex
/ Authors
Luis A. Anchordoqui, John K. Anders, Akitaka Ariga, Tomoko Ariga, David Asner, Jeremy Atkinson, Alan J. Barr, Larry Bartoszek, Brian Batell, Hans Peter Beck
and 104 more authors
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
/ 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.