Expressions of Interest for the Development of Detector Concepts and Sub-detector Systems for the Future Circular Collider FCC

This document accompanies a compilation of submissions of Expressions of Interest (EoIs) for the development of detector concepts and sub-detector systems for the Future Circular Collider (FCC). The actual EoIs can be found in a back-up document submitted in parallel; they are also collected in an indico repository and individually linked in a table in this document for quick access. This summary gives background information about the process leading to these EoIs, presents an overview and general observations, and proposes further steps.

Contribution to the European Strategy for Particle Physics Update (2025-2026)