To hunt for double-Higgs events, the ATLAS Collaboration has targeted the distinctive HH→bb̄τ+τ− decay channel, in which one Higgs boson decays into two bottom quarks and the other into two tau leptons. Their latest search, presented at ICHEP 2026, is the most sensitive ATLAS analysis of this channel to date.

In new results presented at a CERN seminar, the ATLAS Collaboration reported the first observation of ZZ events containing two longitudinally polarised Z bosons, together with evidence for longitudinally polarised Z bosons in electroweak WZ production accompanied by two particle jets – a process that is particularly sensitive to boson scattering.

The ATLAS Collaboration has released a new search for massive, long-lived particles at a collision energy of 13.6 TeV, targeting events containing at least one displaced vertex and one displaced muon. This is the first ATLAS search for LLPs to use LHC Run-3 data.

The ATLAS Collaboration has now introduced DeParT, a new quark/gluon discriminator (or “tagger”) built on the same transformer architecture that powers today's most familiar AI tools.

Summary of new ATLAS results presented at the 2026 International Conference on High Energy Physics (ICHEP).