Four charm quarks, one exotic state: the X(6900) tetraquark. The ATLAS Collaboration at @cern.bsky.social takes a deep dive into the all-charm tetraquark, marking a key step toward understanding exotic bound states of quarks. Learn more ⤵️ atlas.cern/Updates/Brie...

What if we could turn the LHC into a lepton–proton collider? ✨ Thanks to rare quantum fluctuations, protons can briefly contain lepton–antilepton pairs. This allows ATLAS physicists to study lepton–proton collisions, opening a new door in the search for leptoquarks! ⤵️ atlas.cern/Updates/Brie...

Neon collides at the LHC! ✨ The ATLAS Experiment at @cern.bsky.social records its first-ever neon–neon collisions. Take a look at these striking collision event displays – then discover how neon opens up exciting new opportunities to explore the strong force! 🔗 atlas.cern/Updates/News...

Modern #AI techniques are unlocking new ways to analyse particle collisions – and ATLAS is embracing the possibilities. 🔗 Check out our new briefing to learn more ⤵️ atlas.cern/Updates/Brie...

ATLAS closes in on two rare Higgs boson decays! 🤔🔎 New results based on 7 years of LHC data reveal evidence for the Higgs boson decaying to muons, and significantly enhance sensitivity to its decay into a Z boson and a photon. 🔗 Learn more ⤵️ atlas.cern/Updates/Brie...

Elusive romance of top-quark pairs observed at the LHC The @cmsexperiment.bsky.social and @atlasexperiment.bsky.social at CERN’s Large Hadron Collider have observed an unforeseen feature in the behaviour of top quarks that suggests that they form a fleeting union

Bound to be discovered? 🌌 Physicists at the ATLAS Experiment at @cern.bsky.social have observed a "quasi-bound" state formed by a top quark and an anti-top quark – an interaction so subtle it was long thought undetectable at the #LHC. 🔗 Learn more ⤵️ atlas.cern/Updates/Brie...

ATLAS records its first-ever oxygen-oxygen collisions at the LHC! 🎇 These collisions offer a new way to explore the quark-gluon plasma in smaller systems — bridging the gap between proton-lead and lead-lead collisions. 🔗 Learn more: atlas.cern/Updates/News...

13 years later… still a picture-perfect moment!📸 On 4 July 2012, ATLAS and @cmsexperiment.bsky.social announced the discovery of the Higgs boson! Today, we return to the places that witnessed history, because some stories are worth reliving. The Higgs journey since 2012 👉️ atlas.cern/Discover/Phy...

The ATLAS Collaboration at @cern.bsky.social has just launched a new release of #opendata designed to empower education, outreach and #citizenscience! Explore the new release ⤵️ opendata.atlas.cern/docs/categor...

Protons and oxygen collide!💥 The ATLAS Experiment at @cern.bsky.social has recorded its first-ever proton–oxygen collisions. Breathe in today's stunning event displays, then learn how these light-ion collisions can deepen our understanding of fundamental forces. ➡️ atlas.cern/Updates/News...

The ATLAS Collaboration proudly celebrates the recipients of the 2025 ATLAS Outstanding Achievement Awards – recognising the essential, behind-the-scenes work that powers great physics. Meet this recipients ⤵️ atlas.cern/Updates/News...

🎓 Studying particle physics? We've got you covered with expert-designed #cheatsheets from the ATLAS Collaboration! From Feynman diagrams to Monte Carlo, these resources break down some of the most important concepts in particle physics. 🔗 Explore them all here: atlas.cern/Resources/Ch...

🎉 Congratulations to ATLAS Physicist Maria Teresa Dova (University of La Plata) on being named a laureate of the 2025 L’Oréal-UNESCO For Women in Science Awards! 🔗 Learn more: www.unesco.org/en/articles/...

Congratulations to ATLAS physicist Daniela Bortoletto of @ox.ac.uk on being named a 2024 Emmy Noether Distinction Laureate by the European Physical Society! 🎉 🔗 Learn more: eps.org/the-eps-emmy-noether-distinction-2024-is-announced

Here we see the @atlasexperiment.bsky.social Inner Tracker (ITk) Pixel Module assembly #AtCERN. The ITk is a completely new, state-of-the-art detector that will replace the current innermost layer of ATLAS.

The ATLAS Experiment at @cern.bsky.social has just set record limits on #Higgsboson self-interaction. The new result is the first to combine the LHC Run 2 and Run 3 datasets, using an incredible 300 fb⁻¹ of proton–proton collision data. 😳 Learn more ⤵️ atlas.cern/Updates/Brie...

Since the Higgs boson’s discovery, physicists have been refining their understanding of its behavior. ATLAS has released 3 new studies of Higgs decays to W/Z boson pairs, probing its total width – a fundamental parameter – and searching for new physics. Learn more ⤵️ atlas.cern/Updates/Brie...

Researchers at the ATLAS Experiment are searching for a hidden “dark sector” - a realm of new particles and forces that interact very weakly with known matter. Two new results target distinctive signatures of dark-sector particles. atlas.cern/Updates/Brie...

🚀 And we're off! On 5 May 2025, the ATLAS Experiment recorded its first 13.6 TeV collisions of the year, kicking off the third of Run 3 at @cern.bsky.social's flagship accelerator. These event displays capture the first moments of a promising new data-taking season. Learn more: cern.ch/run3-2025

‘Tis the season of #physics 💫 “Stable" particle beams returned to the Large Hadron Collider at 13.51 CEST today, marking the start of the 2025 physics data-taking season, the fourth of the #LHCRun3.

Exploring the W boson at extreme mass scales!🤔 Since their discovery in the 1980s, W bosons have played a key role in exploring the electroweak sector of the Standard Model — and in searching for what might lie beyond it. Learn more about the new ATLAS study ⤵️ atlas.cern/Updates/Brie...

New ATLAS events just dropped! 🎇 Proton beams from the #LHC lit up the ATLAS experiment at #CERN today — and we’ve got the event displays to prove it. ⁠These dazzling "beam splashes" help us test and align our sub-detectors, setting the stage for data-taking.

Physicists from the ATLAS Experiment have released a host of new studies of #heavyion collisions – helping to unravel how matter behaved in the early Universe. Check out the highlights ⤵️ atlas.cern/Updates/News...

ATLAS gets under the hood of the #Higgs mechanism. The detection of longitudinally polarised W boson production at the #LHC is an important step towards understanding how the primordial electroweak symmetry broke, giving rise to the masses of elementary particles. More↓ atlas.cern/Updates/Pres...

“This prize is a celebration of our collaboration, curiosity, and dedication. Thank you to the Breakthrough Prize Board for this incredible honor. And thank you to every ATLAS member—this achievement is yours.” – Stephane Willocq, ATLAS Spokesperson Learn more: atlas.cern/Updates/Pres...

The ATLAS Collaboration has been awarded the 2025 Breakthrough Prize in Fundamental Physics, along with the ALICE Experiment, @cmsexperiment.bsky.social and @lhcb.bsky.social. atlas.cern/Updates/Pres...

Physicists at the ATLAS Experiment @CERN have reported the first evidence of vector boson scattering involving longitudinally polarized same-sign W bosons. This remarkable result provides a powerful probe of the Higgs mechanism. Learn more⤵️ atlas.cern/Updates/Brie...

What if new physics is hiding just out of sight? ✨ New particles created by the #LHC could travel several meters before decaying inside the ATLAS experiment – leaving behind “displaced” tracks. Learn more ⤵️ atlas.cern/Updates/Brie...

The Higgs boson interacts much more strongly with tau leptons than with electrons or muons — but why? The ATLAS Collaboration at #CERN has just released two new studies investigating the production of taus in high-energy proton collisions. Find out more⤵️ atlas.cern/Updates/Brie...

The ATLAS Collaboration has just presented its most precise single measurement of the top quark mass, using high-momentum ("boosted") top quarks! 🔗 Learn more in the new briefing atlas.cern/Updates/Brie...

Tune in today at 11 AM CET for a live LHC Seminar on new measurements of the top quark! ATLAS physicist Mark Owens will present a new study that has boosted the precision of the top quark mass measurement. Watch live: cern.ch/atlas-webinar

🇬🇷 Συντονιστείτε για μια ζωντανή εικονική επίσκεψη στο πείραμα ATLAS στο CERN με τη Δέσποινα Σαμψωνίδου και τον Κάρολο Ποταμιάνο. Σήμερα στις 16:00 (ώρα Ελλάδας) ζωντανά στο YouTube: www.youtube.com/watch?v=ivWp...

Ζωντανή Διαδικτυακή Ξενάγηση στο πείραμα ATLAS στο CERN ! Συνδεθείτε μαζί μας και δείτε από μέσα το πείραμα ATLAS μαζί με τους φυσικούς Δέσπονα Σαμψωνίδου και Κάρολο Ποταμιάνο – στα Ελληνικά 🇬🇷 📅 Ημερομηνία: 20 Μαρτίου 🕒 Ώρα: 15:00 (CET) 📺 Πού: Ζωντανά στο YouTube www.youtube.com/watch?v=ivWp...

The ATLAS Collaboration at CERN welcomes a new management team, with Stéphane Willocq (University of Massachusetts Amherst) as Spokesperson. He takes the helm at a pivotal moment for ATLAS, as members wrap up data-taking from #LHC Run-3 and prepare for extensive upgrades. atlas.cern/Updates/News...

This International Women’s Day, 8 March, we challenged 8 brilliant women from ATLAS to tell us about each other — with no scripts, just physics! Join us in celebrating the diversity, talent and dedication of the women who help drive our Collaboration forward every day: shorturl.at/OvlIH

🏆 And the ATLAS Thesis Awards go to… 👏 Congratulations to the winners: Christian Appelt, Ana Luisa Moreira de Carvalho, Shalini Epari, Emily Ann Smith, Kaito Sugizaki, Martino Tanasini, Aric Tate, and Makayla Vessella! Learn more & check out their winning theses ⤵️ atlas.cern/updates/news...

¡Únete a Rebeca Gonzalez Suarez (🇪🇸) y a Dilia Portillo Quintero (🇨🇴) en este tour virtual en directo desde el experimento ATLAS en el CERN! Hoy a las 17:00 (CET) en YouTube: www.youtube.com/watch?v=8Lgg...

¡Únete a nosotros en un recorrido virtual en directo desde el detector ATLAS en el #CERN! Participa en esta emocionante visita entre bastidores con dos miembros de ATLAS – en español. 🗓️ Fecha: 25 de febrero ⏰ Hora: 17:00 (CET) 📺 Dónde: En directo en YouTube www.youtube.com/watch?v=8Lgg...

To celebrate #IDWGS, we are heading underground with Dr. Neza Ribaric and Dr. Claudia Merlassino to see the ATLAS Experiment at CERN! Join the live virtual visit on Tiktok: www.tiktok.com/@atlasexperi...

Today, on the International Day of Women and Girls in Science, we celebrate the incredible contributions of women in the ATLAS Collaboration at @CERN. ATLAS is committed to fostering an inclusive environment where talent thrives regardless of gender. #IDWGS

Junte-se a nós nesta tour virtual em direto da Experiência ATLAS no CERN. 🇵🇹 🇧🇷 Está prestes a começar! www.youtube.com/watch?v=Xoc6...

Junte-se a nós numa tour virtual em direto da Experiência ATLAS no #CERN! Participe nesta emocionante visita pelos bastidores com dois membros do ATLAS – em português 🇵🇹 🗓️ Data: 6 de fevereiro ⏰ Hora: 17:00 (CET) 📺 Onde: Em direto no YouTube www.youtube.com/live/Xoc6bM8...

Did you know that massive vector bosons also come in triplets? Physicists at the ATLAS Collaboration at #CERN have observed “VVZ production” – a rare combination of three massive vector bosons produced simultaneously at the LHC. Read our new briefing to find out more! ⤵️ atlas.cern/Updates/Brie...

Begleiten Sie uns zu einer virtuellen Live-Führung durch das ATLAS-Experiment am CERN. Es geht gleich los! youtube.com/live/o9-UXNQ...

Begleiten Sie uns zu einer virtuellen Live-Führung durch das ATLAS-Experiment am #CERN! Gehen Sie mit zwei ATLAS-Physikerinnen auf eine spannende Entdeckungsreise – auf Deutsch 🇩🇪 🗓️ Datum: 31. Januar ⏰ Uhrzeit: 16:00 Uhr 📺 Wo: Live auf YouTube www.youtube.com/live/o9-UXNQ...

Congratulations to ATLAS physicist Francesco Giuli (University of Rome Tor Vergata) for receiving the 2024 Wu-Ki Tung Award for Early-Career Research on QCD. 🎉 ➡️ Learn more about the award: cern.ch/wukitungaward

3D print your own ATLAS Experiment! 🖨️ This 1:100 scale model, designed by physicist Jan Brajer, showcases the beauty and complexity of particle physics. Perfect for 3D printing enthusiasts and science lovers alike! Download the files here: atlas.cern/Resources/3d...

The ATLAS Experiment at CERN releases its first open data from heavy-ion collisions! This is the highest energy heavy-ion collision data ever made publicly available and is the first LHC Run 2 heavy-ion open dataset. Learn more and dive in to the data: atlas.cern/Updates/News...

The ATLAS Collaboration has just published a search for two new #Higgsboson particles. These new bosons could explain the matter-antimatter imbalance of the Universe. Learn more in our new briefing atlas.cern/Updates/Brie...