Summary of new ATLAS results from EPS-HEP 2025
6 July 2025 | By
As summer arrives and the Mediterranean sun lights up Marseille, the particle physics community gets ready for one of the season’s key highlights: the European Physical Society Conference on High Energy Physics (EPS-HEP). From 7 to 11 July, hundreds of researchers will gather by the sea to share the latest breakthroughs in understanding the fundamental building blocks of our Universe.
The ATLAS Collaboration will be making waves at EPS-HEP 2025, unveiling a wide range of new results. These include new insights into the Standard Model and bold searches for new physics — all powered by the LHC Run-2 (2015–2018) and the ever-growing Run-3 (2022–present) datasets.
Key highlights will be explored in upcoming physics briefings throughout the conference, with many more results to discover in conference talks. Follow the 2025 EPS conference tag for the latest updates, and dive into the full list of ATLAS results below.
News and Physics Briefings
- Bound to be discovered? ATLAS explores top-quark interactions near threshold, Physics Briefing, 7 July 2025
- ATLAS closes in on rare Higgs decays, Physics Briefing, 7 July 2025
- ATLAS enters a new era of jet flavour tagging – powered by AI, Physics Briefing, 7 July 2025
- Elusive romance of top-quark pairs observed at the LHC, CERN Press Release, 8 July 2025
New results presented at EPS-HEP 2025
Higgs Boson and Di-Higgs
- Study of Higgs boson pair production in the HH→bbγγ final state with 308 fb-1 of data collected at 13 TeV and 13.6 TeV by the ATLAS experiment (ATLAS-CONF-2025-005)
- Probing the Higgs boson CP properties in vector-boson fusion production in the H→τ+τ− channel with the ATLAS detector (arXiv:2506.19395, see figures)
- Evidence for the dimuon decay of the Higgs boson in proton-proton collisions with the ATLAS detector (HIGP-2024-11)
- Search for the Higgs boson decay to a Z boson and a photon in proton-proton collisions at 13 TeV and 13.6 TeV with the ATLAS detector (ATLAS-CONF-2025-007)
Searches for New Physics
- Search for single production of vector-like quarks decaying into W(ℓν)b in proton-proton collisions at 13 TeV with the ATLAS detector (arXiv:2506.15515, see figures)
- Search for decays of the Higgs boson into scalar particles decaying into four or six b-quarks using proton-proton collisions at 13 TeV with the ATLAS detector (arXiv:2507.01165, see figures)
- Search for squarks and gluinos in proton-proton collisions at 13 TeV and 13.6 TeV in events with τ-leptons, jets and missing transverse momentum using the ATLAS detector (arXiv:2507.00296, see figures)
- A search for dark matter produced in association with a dark Higgs boson decaying into a Higgs boson pair in 3b or 4b final states using proton-proton collisions at 13 TeV with the ATLAS detector (arXiv:2507.02175, see figures)
Standard Model
- Observation of double parton scattering in same-sign W boson pair production in proton-proton collisions at 13 TeV with the ATLAS detector (arXiv:2505.08313, see figures)
- Measurements and interpretations of W±Z production cross-sections in proton-proton collisions at 13 TeV with the ATLAS detector (STDM-2019-26)
Top Quark
- Observation of tt¯γγ production at 13 TeV with the ATLAS detector (arXiv:2506.05018, see figures)
- Measurements of differential cross-sections of WbWb production in the dilepton channel in proton-proton collisions at 13 TeV using the ATLAS detector (arXiv:2506.14700, see figures)
- Measurement of the top-quark pole mass in dileptonic tt¯+1-jet events at 13 TeV with the ATLAS experiment (arXiv:2507.02632, see figures)
- Observation of a cross-section enhancement near the tt¯ production threshold in 13 TeV proton-proton collisions with the ATLAS detector (ATLAS-CONF-2025-008)
Physics Modelling & Performance
- Modelling of Longitudinal-Longitudinal polarisation of the ZZ final state in the four-lepton decay channel at the ATLAS experiment (ATL-PHYS-PUB-2025-021)
- Identification of Boosted Higgs Bosons decaying into a pair of collimated τ-leptons decaying hadronically with Transformer Neural Networks in ATLAS (ATL-PHYS-PUB-2025-026)
- Explaining the ATLAS GN2 Flavour Tagging Algorithm with Integrated Gradients (ATL-PHYS-PUB-2025-029)
- Evaluating the statistical uncertainties and statistical consistency of constraints for the jet η-intercalibration in ATLAS (ATL-PHYS-PUB-2025-026)
