The ATLAS experiment
  1. ATLAS Collaboration publishes Letter of Intent

    The ATLAS Collaboration proposes the construction…

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  2. Submission of Technical Proposal

    The ATLAS Collaboration submits the technical…

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  3. Formal Approval of ATLAS Experiment

    The LHC Experiments Committee and CERN Director-…

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  4. Excavation of the ATLAS Experiment cavern begins

    Team of engineers begin excavating a series of…

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  5. ATLAS cavern inaugurated

    After five years of innovative and ingenious…

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  6. World’s largest superconducting magnet turns on

    The ATLAS Barrel Toroid, a characteristic…

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  7. End of ATLAS construction

    To celebrate the end of the ATLAS construction…

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  8. ATLAS records first collisions

    The start of a fantastic era of physics! ATLAS…

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  9. First LHC collisions at 7 TeV

    ATLAS records collisions at 7 TeV centre-of-mass…

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  10. ATLAS observes striking imbalance of jet energies in heavy ion collisions

    Only 3 weeks into its first LHC heavy-ion run,…

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  11. First ATLAS observation and rate measurement of top quark pairs

    The ATLAS Experiment observes the production of…

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  12. ATLAS and CMS observe a particle consistent with the Higgs boson

    On 4 July 2012, as a curtain raiser to the year…

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  13. Toward 14 Tev: preparing for increase in total energy

    In February 2013, the LHC and the ATLAS…

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  14. Nobel Prize for the Higgs discovery

    The 2013 Nobel Prize in physics is awarded to…

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  15. Data-taking to continue until 2035

    The LHC will be upgraded to 14 TeV collision…

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  16. ATLAS finds evidence for the rare electroweak W±W± production

    ATLAS publishes first evidence for electroweak…

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  17. ATLAS Begins Recording Physics Data at 13 TeV

    ATLAS began recording physics data from 13 TeV…

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  18. Combination of Higgs boson production and decay measurements of ATLAS and CMS

    The ATLAS and CMS Experiments release combined…

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  19. First measurement of the W boson mass at the LHC

    ATLAS shows its strength for precision physics,…

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  20. First Technical Design Report released for ATLAS upgrade

    ATLAS begins preparations for the Phase II…

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  21. Sighting the Higgs in its favourite decay

    ATLAS sees the first LHC evidence of the Higgs…

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  22. First direct evidence of light-by-light scattering at high energy

    ATLAS publishes the first direct evidence of high…

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  23. ATLAS observes direct interaction of Higgs boson with top quark

    ATLAS announces the observation of Higgs bosons…

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  24. ATLAS observes elusive Higgs boson decay to a pair of bottom quarks

    The Higgs boson is observed decaying into a pair…

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