The impending update to the European Strategy for Particle Physics is an apt moment to chart the future of the field — a future that should be supported and ensured.
The particle physics community refreshes the roadmap for the field in Europe, taking into account the worldwide context, in the so-called European Strategy for Particle Physics update, which happens every seven years.
The Future Circular Colliders are proposed as a future step after the Large Hadron Collider has stopped running. The first stage foresees collision of electron–positron pairs before a machine upgrade to allow proton–proton operation.
The Compact Linear Collider is a proposed high-luminosity electron–positron collider that can reach TeV-scale energies. Its accelerator design and physics programme, mainly focusing on precision measurements and new physics searches, are discussed.
Within the Physics Beyond Collider programme, complementary methods to high-energy frontier particle colliders to investigate the physics of elementary particles and their interactions are studied.
Proposals for the particle physics programmes in the United States and Asia are discussed; mainly the International Linear Collider in Japan, the Circular Electron–Positron Collider in China and accelerator-based long-baseline neutrino experiments in the United States.