News

ATLAS Experiment records “first physics” at new high-energy frontier

“We have proton collisions in the ATLAS experiment.” At 16.47 CEST, the Large Hadron Collider (LHC) officially kicked off its third period of operation (Run 3). The LHC is colliding proton beams at a world-record-breaking energy of 13.6 tera electron volts (TeV). The higher beam energy and intensity of Run 3 will allow the ATLAS experiment to push the very limits of its physics research.

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LHC Run 3 starts

The Large Hadron Collider is ready to once again start delivering proton collisions to experiments, this time at an unprecedented energy of 13.6 TeV, marking the start of the accelerator’s third run of data taking for physics.

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10 years of Higgs research

The ATLAS Collaboration at CERN has released its most comprehensive overview of the Higgs boson. The new paper, published in the journal Nature, comes exactly ten years after ATLAS announced the discovery of the Higgs boson. In celebration of this anniversary, a special all-day symposium on the Higgs boson is currently underway at CERN.

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ATLAS & CMS Higgs study 2022

The collaborations have used the largest samples of proton–proton collision data recorded so far by the experiments to study the unique particle in unprecedented detail.

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Outstanding Achievement Awards

The ATLAS Collaboration held the 6th Outstanding Achievement Awards Ceremony at CERN on 23 June 2022. Once every two years, these awards give recognition to the invaluable technical work made across the collaboration in all areas.

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Summary of new ATLAS results from LHCP 2022

The tenth edition of the annual conference on Large Hadron Collider physics (LHCP 2022) begins today in video-conference rooms around the world.

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Looking inside trillion degree matter with ATLAS at the LHC

Stars, planets, animals, plants, you and me – everything that can be directly observed in our Universe is ordinary matter. But the Universe didn’t always look this way. This ATLAS feature describes the quark-gluon plasma, a unique state of matter that existed shortly after the Big Bang. The nature and properties of this matter are being revealed at CERN’s ATLAS Experiment.



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Beams splash in ATLAS

After over three years of upgrade and maintenance work, proton beams are back in the Large Hadron Collider! Friday 22 April 2022 marked the start of the LHC’s third operation period (Run 3), which will see a record number of collisions in the ATLAS detector.

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ATLAS highlights from the Moriond 2022 conference

As one of the most exciting and promising experiments for new crucial discoveries in the field of high-energy particle physics, ATLAS contributed many novel results presented in dedicated talks at the recent Rencontres de Moriond conference.

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ATLAS Live talk: Artificial Intelligence, Machine Learning and the Higgs boson with Dr. David Rousseau

On 31 March 2022 at 8pm CEST, Dr. David Rousseau will give a live public talk on the ATLAS Youtube Channel on the role artificial intelligence plays in particle physics research.

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Summary of new ATLAS results from 2022 Winter Conferences

The winter conference season is in full swing! 2022 marks the return of full auditoriums and coffee-break chats, as the La Thuile and Rencontres de Moriond conferences welcome participants to venues in the Italian Alps. These are the first large-scale, international particle physics conferences to be held in person in the COVID era – reuniting experimentalists and theorists after almost two years of virtual meetings.

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And the ATLAS Thesis Awards go to…

Behind nearly every great ATLAS result lies an outstanding PhD student! Students are a key cohort of the ATLAS Collaboration, making critical contributions to the experiment while working on their degree. Every year, the Collaboration comes together to celebrate their work in the context of the ATLAS Thesis Awards.

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ATLAS Live talk: Exploring electroweak phenomena with Dr. Karolos Potamianos

On 17 February 2022 at 8pm CET, Dr. Karolos Potamianos will give a live public talk on the ATLAS Youtube Channel on the study of the electroweak force and the role it plays in the Universe.

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Summary of new ATLAS results from Lepton Photon 2021

The 30th International Symposium on Lepton Photon Interactions at High Energies (Lepton Photon 2021) kicks off today. Explore the ATLAS results that will be presented.

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ATLAS Live talk: Building the Data Haystack with Dr Heather Russell

On 22 November 2021 at 8pm CET, Dr. Heather Russell will give a live public talk on the ATLAS Youtube Channel on the "trigger", the ATLAS event selection system.

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Detectors for a new era of ATLAS physics

4 November 2021, Geneva. The ATLAS Experiment at CERN welcomes a brand-new detector: the Muon New Small Wheel system. Its successful installation follows nearly a decade of design and construction, and marks a major milestone in ATLAS’ high-luminosity era.

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Bringing new life to ATLAS data

The ATLAS Collaboration is breathing new life into its LHC Run-2 dataset, recorded from 2015 to 2018. Physicists will be reprocessing the entire dataset – nearly 18 PB of collision data – using an updated version of the ATLAS offline analysis software (Athena). Not only will this improve ATLAS physics measurements and searches, it will also position the Collaboration well for the upcoming challenges of Run 3 and beyond.

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ATLAS Live talk: Studying the top quark at the LHC with Dr Maria Moreno Llácer

On 23 September 2021 at 8pm CEST, Dr. Maria Moreno Llácer will give a live public talk on the ATLAS Youtube Channel on the top quark. She will explain what makes this quark such a unique particle and describe the role it plays in the search for new physics.

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ATLAS highlights from the EPS-HEP 2021 conference

ATLAS’ vibrant physics programme was on full display at EPS-HEP 2021, with members presenting 26 new physics analyses among other key recent results. These were shown in 63 presentations and 45 posters over the five days.

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Summary of new ATLAS results from EPS-HEP 2021

The European Physical Society Conference on High Energy Physics (EPS-HEP 2021) kicks off today. Explore the ATLAS results that will be presented.

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The Last Quark

Twenty-five years on from the discovery of the top quark, ATLAS physicist Richard Hawkings discusses the history of the particle's discovery, its place in the Standard Model and what it has still yet to tell us.

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Live from the ATLAS experiment

In celebration of the lowering of the first New Small Wheel detector, CERN is hosting a 360° live event from the ATLAS cavern! Tune in on Thursday 15 July at 5pm CEST.

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ATLAS Live talk: Deciphering the Higgs boson with Dr Hongtao Yang

On 1 July 2021, Dr. Hongtao Yang will be giving a live public talk, sharing the story of the Higgs boson's discovery by the ATLAS and CMS experiments. He will explain what ATLAS physicists have learned about this fascinating particle so far, and describe the next steps in its exploration.

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ATLAS celebrates results of 1000 collision papers

The ATLAS Collaboration celebrates the creativity, wealth and scientific impact enshrined in its 1000 papers using LHC collision data. This work – together with that carried out by its sister experiments at the LHC – represents a diversified physics programme that is unprecedented and unequalled in physics research to date.

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Summary of new ATLAS results from LHCP 2021

The ninth annual conference on Large Hadron Collider physics (LHCP 2021) begins today in video-conference rooms around the world.

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