doi:10.17181/CERN.F5VS.K3VWThe European Strategy GroupThe European Strategy for Particle Physics: 2026 Update - Deliberation document by the European Strategy GroupCERN-ESU-2026-0032026http://cds.cern.ch/record/295741110.17181/CERN.F5VS.K3VWhttp://cds.cern.ch/record/2957411oai:cds.cern.ch:2957411