The Forward Physics Facility: Sites, Experiments, and Physics Potential

TL;DR

The Forward Physics Facility at the LHC aims to enable new experiments detecting rare particles and phenomena outside current detector acceptance, advancing searches for new physics and understanding of fundamental particles.

Contribution

This paper details the current plans, site selection, and experimental proposals for the FPF, highlighting its potential to explore Standard Model and beyond Standard Model physics.

Findings

Identification of promising sites for the FPF.

Outline of experiments targeting long-lived particles and dark sectors.

Potential to significantly advance neutrino and QCD studies.

Abstract

The Forward Physics Facility (FPF) is a proposal to create a cavern with the space and infrastructure to support a suite of far-forward experiments at the Large Hadron Collider during the High Luminosity era. Located along the beam collision axis and shielded from the interaction point by at least 100 m of concrete and rock, the FPF will house experiments that will detect particles outside the acceptance of the existing large LHC experiments and will observe rare and exotic processes in an extremely low-background environment. In this work, we summarize the current status of plans for the FPF, including recent progress in civil engineering in identifying promising sites for the FPF and the experiments currently envisioned to realize the FPF's physics potential. We then review the many Standard Model and new physics topics that will be advanced by the FPF, including searches for long-lived particles, probes of dark matter and dark sectors, high-statistics studies of TeV neutrinos of all three flavors, aspects of perturbative and non-perturbative QCD, and high-energy astroparticle physics.