ATLAS Experiment
@atlasexperiment.bsky.social
The ATLAS experiment at the Large Hadron Collider at CERN.
Reposted by ATLAS Experiment
🎤 Are you passionate about science? Show us! 😉
To mark the 20th anniversary of FameLab International, CERN is teaming up with FameLab to invite you to share your love for science and win fantastic prizes.
To mark the 20th anniversary of FameLab International, CERN is teaming up with FameLab to invite you to share your love for science and win fantastic prizes.
November 3, 2025 at 8:24 AM
🎤 Are you passionate about science? Show us! 😉
To mark the 20th anniversary of FameLab International, CERN is teaming up with FameLab to invite you to share your love for science and win fantastic prizes.
To mark the 20th anniversary of FameLab International, CERN is teaming up with FameLab to invite you to share your love for science and win fantastic prizes.
Curiosity drives discovery!🌌
The ATLAS Experiment @cern.bsky.social brings together thousands of scientists and engineers from around the world to explore the building blocks of the Universe.
🎥 Watch our new introductory video, available in 6 languages on YouTube. www.youtube.com/watch?v=6UqW...
The ATLAS Experiment @cern.bsky.social brings together thousands of scientists and engineers from around the world to explore the building blocks of the Universe.
🎥 Watch our new introductory video, available in 6 languages on YouTube. www.youtube.com/watch?v=6UqW...
Mapping the Secrets of the Universe | Inside the ATLAS Experiment
YouTube video by ATLAS Experiment
www.youtube.com
October 15, 2025 at 4:57 PM
Curiosity drives discovery!🌌
The ATLAS Experiment @cern.bsky.social brings together thousands of scientists and engineers from around the world to explore the building blocks of the Universe.
🎥 Watch our new introductory video, available in 6 languages on YouTube. www.youtube.com/watch?v=6UqW...
The ATLAS Experiment @cern.bsky.social brings together thousands of scientists and engineers from around the world to explore the building blocks of the Universe.
🎥 Watch our new introductory video, available in 6 languages on YouTube. www.youtube.com/watch?v=6UqW...
A rare sight at the LHC 👀
The ATLAS Collaboration at @cern.bsky.social reports its first observation of WWγ production — a rare process where two W bosons and a photon are produced together.
🔗 Learn more: atlas.cern/Updates/Brie...
The ATLAS Collaboration at @cern.bsky.social reports its first observation of WWγ production — a rare process where two W bosons and a photon are produced together.
🔗 Learn more: atlas.cern/Updates/Brie...
Shining light on the Weak force: ATLAS observes WWγ production
The ATLAS Collaboration reports its first observation of WWγ production – a rare process involving the simultaneous production of two W bosons and a photon. The weak force is one of the four fundament...
atlas.cern
October 8, 2025 at 7:46 PM
A rare sight at the LHC 👀
The ATLAS Collaboration at @cern.bsky.social reports its first observation of WWγ production — a rare process where two W bosons and a photon are produced together.
🔗 Learn more: atlas.cern/Updates/Brie...
The ATLAS Collaboration at @cern.bsky.social reports its first observation of WWγ production — a rare process where two W bosons and a photon are produced together.
🔗 Learn more: atlas.cern/Updates/Brie...
Congratulations to ATLAS Physicist Mounia Laassiri (Brookhaven National Laboratory) on being named a laureate of the 2025 UNESCO–AI Fozan Prize for the Promotion of Young Scientists in STEM!
🔗 Learn more: www.unesco.org/en/articles/...
🔗 Learn more: www.unesco.org/en/articles/...
September 23, 2025 at 12:33 PM
Congratulations to ATLAS Physicist Mounia Laassiri (Brookhaven National Laboratory) on being named a laureate of the 2025 UNESCO–AI Fozan Prize for the Promotion of Young Scientists in STEM!
🔗 Learn more: www.unesco.org/en/articles/...
🔗 Learn more: www.unesco.org/en/articles/...
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...
ATLAS takes a closer look at the all-charm tetraquark
The strong force, unrivaled in strength yet confined to minuscule distances, produces unique bound states of quarks known as quarkonia. These are the strong-force equivalent of the hydrogen atom, cons...
atlas.cern
September 18, 2025 at 6:58 PM
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...
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...
Turning the LHC into a Lepton-Proton Collider in the search for leptoquarks
All matter in the universe is made up of just two fundamental building blocks: quarks and leptons. Intriguingly, both have three distinct families or “generations”. For example, the electron and its a...
atlas.cern
August 28, 2025 at 3:26 PM
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...
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...
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...
July 10, 2025 at 2:26 PM
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...
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...
🔗 Check out our new briefing to learn more ⤵️ atlas.cern/Updates/Brie...
July 10, 2025 at 10:04 AM
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...
🔗 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...
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...
ATLAS closes in on rare Higgs decays
The ATLAS Collaboration finds evidence of Higgs-boson decays to muons and improves sensitivity to Higgs-boson decays to a Z boson and a photon. Since the discovery of the Higgs boson in 2012, physicis...
atlas.cern
July 8, 2025 at 3:52 PM
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...
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...
Reposted by ATLAS Experiment
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
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
July 8, 2025 at 10:00 AM
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
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...
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...
Bound to be discovered? ATLAS explores top-quark interactions near threshold
The top quark is a bit of a loner. While other quarks can join together to form bound states called hadrons, the top quark’s extremely short lifetime means it decays almost instantly – disappearing be...
atlas.cern
July 7, 2025 at 2:14 PM
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...
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...
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...
July 7, 2025 at 12:40 PM
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...
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...
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...
July 4, 2025 at 1:10 PM
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...
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...
Explore the new release ⤵️
opendata.atlas.cern/docs/categor...
13 TeV (2025 Beta Release) | ATLAS Open Data
Welcome to the tutorial page for the 2025 13 TeV beta release. Please, start by choosing your enviroment and continue as needed.
opendata.atlas.cern
July 3, 2025 at 4:33 PM
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...
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 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...
July 1, 2025 at 2:31 PM
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 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...
Meet this recipients ⤵️ atlas.cern/Updates/News...
Celebrating the outstanding achievements of the ATLAS Collaboration
The ATLAS Collaboration celebrated the dedication, ingenuity and collaborative spirit of its members at the 8th Outstanding Achievement Awards. Winners of the ATLAS Outstanding Achievement Awards 2025...
atlas.cern
June 30, 2025 at 9:29 PM
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...
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...
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...
June 5, 2025 at 2:34 PM
🎓 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...
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/...
🔗 Learn more: www.unesco.org/en/articles/...
June 4, 2025 at 1:33 PM
🎉 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/...
🔗 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
🔗 Learn more: eps.org/the-eps-emmy-noether-distinction-2024-is-announced
June 3, 2025 at 3:34 PM
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
🔗 Learn more: eps.org/the-eps-emmy-noether-distinction-2024-is-announced
Reposted by ATLAS Experiment
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 ITk is a completely new, state-of-the-art detector that will replace the current innermost layer of ATLAS.
April 22, 2025 at 7:28 AM
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 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...
Learn more ⤵️
atlas.cern/Updates/Brie...
ATLAS sets record limits on Higgs self-interaction using Run 3 data
One of the biggest open questions in particle physics today is how the Higgs boson interacts with itself. This “self-coupling” plays a pivotal role in determining the shape of the energy potential of ...
atlas.cern
May 22, 2025 at 2:43 PM
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...
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...
Studying the Higgs boson across the scales
Since the Higgs boson's discovery in 2012, physicists have continued to explore its properties with increasing precision, revealing the inner workings of the Standard Model and probing for hints of ph...
atlas.cern
May 16, 2025 at 4:21 PM
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...
Shedding light with jets from the dark side
Imagine a jet of particles that defies the rules of the Standard Model. Unlike most jets produced in high-energy collisions, its energy seems to suddenly vanish or it doesn't originate at the collisio...
atlas.cern
May 15, 2025 at 3:12 PM
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
These event displays capture the first moments of a promising new data-taking season. Learn more: cern.ch/run3-2025
May 6, 2025 at 7:54 AM
🚀 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
These event displays capture the first moments of a promising new data-taking season. Learn more: cern.ch/run3-2025
