🎁 The supporting structure of the new CMS HGCAL detector has arrived at @cern.bsky.social for assembly! 🛳️ 🚚 After an eight-week journey, the first HGCAL absorber structure was delivered and is ready to be assembled ready for #HiLumi! 👉 cms.cern/news/support...

Learn about how by testing new parts of the detector ECAL moves closer ot Hi-Lumi! youtu.be/tRUp5c_W06M

How did the US become such a big part of CMS? Learn more about it on our YouTube channel by clicking the link! youtu.be/3Prfwq3RiWA?...

Fourth time's the charm! ✨ The CMS Collaboration has identified a family of all-charm tetraquark states consistent with a pairing of two quarks and two antiquarks. 👉Read the CMS briefing: cms.cern/news/cms-get... 👉And the @nature.com article: www.nature.com/articles/d41...

Deciphering the heavyweights of the tetraquark world The @cmsexperiment.bsky.social reports the first measurement of the quantum properties of a family of tetraquarks that was recently discovered at the LHC Find out more: home.cern/news/news/ph...

Are there tiny, quantum black holes in nature that evaporate in an instant? ⚫ CMS uses sophisticated machine learning to look for signs of these microscopic black holes and other exotic objects. 👉Read more: cms.cern/news/are-the...

🏆 CMS scientist Luigi Marchese wins the prestigious SIF 2025 award for Science Communication, recognising his work on putting physics into comics! ✨These projects mean that children reading Mickey Mouse can also be learning about fundamental particles! 🌌 👉 Read more here: cms.cern/news/cms-sci...

@UVA postdoc Bryan Cardwell and his colleagues on #CMSexperiment are working on an ultra-precise timing detector for the #HiLumiLHC that will give scientists a new way to look for slow-moving massive particles like dark matter.

🗨️Let’s talk about the PPS (Precision Proton Spectrometer), one of the CMS sub-detectors. Nicola is ready to drop 3 fun facts about this special detector. How many did you already know? Do you want to learn more about PPS? We got you covered: youtu.be/WyuQaxvpnNM?...

CERN celebrates LGBTQ+ in STEM Day Today we celebrate and highlight the work of and barriers facing LGBTQIA+ people in science, technology, engineering and maths. To mark the date, the Progress Pride flag will fly above the Esplanade des Particules for the third year. 🔗 home.cern/news/news/ce...

Happy #PrideinSTEMDay! 🏳️‍🌈🏳️‍⚧️ ATLAS proudly celebrates the incredible diversity of our scientific community. Our varied backgrounds, perspectives and identities drive excellence in research. We are committed to advancing the recognition and representation of our LGBTQ+ colleagues — today and every day.

Happy #PrideInSTEMDay! 🏳️‍🌈 Today we celebrate all our colleagues and their identities, and raise the inclusive pride flag in recognition of all members of the LGBTQIA+ community who have contributed and who continue to contribute to STEM 🌈

Throwback to the ECAL electronics testing for the #HiLumiLHC on the spare SuperModule 36 at #CERN! Preparing for the ECAL test beam with the latest upgrade version to verify it meets HiLumi LHC requirements. 🏆 ECAL Image of the Month 📸 Matteo Migliorini

👉 From celebrating the World Wide Web's local pioneers to exploring the CMS experiment site, see how science and community connected for this year's #FêteDeLaScience: cms.cern/news/fete-de...

From brainstorming sessions to hands-on coding, the #2ndNGTHackathon brought together more than 40 physicists, engineers, data scientists and other experts from #NextGenTruggers CMS Collaboration, ATLAS Collaboration to explore innovative ideas for the upgrade of the trigger systems for HiLumiLHC.

A chilly winter is coming for Tom and Jerry! 🥶 Their namesake cold boxes at Point 5 are getting prepped with their safety system junction boxes. Soon, they'll be chilling the future cassettes of the HGCAL calorimeter to a frosty -35 °C for testing! 🏆 HGCAL Image of the Month 📸 Ebru Simsek

Huge congratulations to former CMS Spokesperson Joel Butler, recipient of the 2026 APS Panofsky Prize in Experimental Particle Physics! 👏 ➡ Read more: cms.cern/news/cms-phy...

Proton collisions at the LHC end on a high(-luminosity) note 💫 During this year, an exceptional volume of data was collected at a collision energy of 13.6 teraelectronvolts (TeV). Watch to find out more about what this means. 👇

First observation of single top quark production with W and Z bosons This incredibly rare phenomenon, observed at the @cmsexperiment.bsky.social, can help probe the fundamental forces of nature. Find out more: home.cern/news/news/ph...

The first tray, assembled at Peking University, has arrived at CERN in late September! The BTL team was eager to unbox the tray, packaged in a wooden crate, padded with foam, suspended on vibration damping feet and wrapped in anti-static foil. 🏆 MTD Image of the Month 📸 Nefeli Stathaki

👂What if we could hear the data from particle collisions? Or what if we could hear the gaps where dark matter could be hidden? A year on from his performance of sonified data at CMS, artist Chris Henschke reflects on the experience and where it took him 👉 cylindricalonion.web.cern.ch/blogs/dark-w...

You searched, we answered (#CERNLibrary Edition) 🗣️ In celebration of #DarkMatterDay, we invited Kyungmin from the @cmsexperiment.bsky.social to address some of the web’s most searched questions about #DarkMatter.

Huge congratulations to the 2025 CMS Young Researcher Prize winners announced during CMS week! 🏆 The winners are: Cécile Caillol, Elisabetta Manca, Mario Masciovecchio, Jennifer Ngadiuba! 👏 Click the link to read about their research: cmsexperiment.web.cern.ch/news/young-r...

🥇In a remarkable first, CMS observes a process that happens only once in a trillion proton-proton collisions – the creation of a top quark together with a W and a Z boson. 😮 Read the full briefing here: cms.cern/news/cms-obs...

🤯206 collisions in one bunch crossing! Usually, we see around 60 collisions every time a bunch of protons meet another, so this is a test of a very special kind for the High Luminosity phase! 😍This is what the CMS detector captures during events such as these! 😍 🎞️Tom McCauley

Did you miss our live virtual visit? No problem! You can watch it on our YouTube channel by clicking the link! www.youtube.com/live/7CL6qoN...

What's it like for a 16-year-old from Spain to land a job-shadowing internship at CMS? Palma's diary is a must-read: ➡️Descending into the CMS cavern ➡️Working with CMS physicists ➡️Seeing the Antimatter Factory! ✍️ Read her incredible week-long adventure: cylindricalonion.web.cern.ch/blogs/how-yo...

What is the CMS Precision Proton Spectrometer? Learn about it on our YouTube channel by clicking the link! youtu.be/WyuQaxvpnNM?...

Teaching machines to see the invisible: In a first-of-its-kind search at a particle collider, the CMS experiment uses physics-informed machine learning to look for partially visible sprays of particles (jets), containing leptons and dark matter 🌌 👉 Read more: cms.cern/news/using-p... #physics

The vacuum plate secures 13 types of HGCAL cooling plates for precise machining. The groove enables air evacuation, while the black line indicates the sealing gasket ensuring tightness. 🏆HGCAL Image of the Month 📸Florian Baudette

Clash of the Titans: CMS has measured the rate at which top quark pairs are produced in lead-lead collisions with unprecedented precision. 📍Read more: cms.cern/news/clash-t...

If you're near Cessy (France), tomorrow, don't miss the chance to learn about CERN and the CMS experiment! #FêtedelaScience

Congrats to Congqiao Li, Christina Wenlu Wang, & Ho Fung Tsoi for rising above a pool of 19 nominees with their exceptional research and winning the 2024 CMS PhD Thesis Award! 🏆 🔗Find out more, including a video of the winners answering questions: cms.cern/news/cms-phd...

The CMS Collaboration is proud to announce the recipients of the 2024 Industry and Partner Awards, which recognise the vital contributions of our partners in advancing the experiment's capabilities 🏆 🗞️Find out more about it here: cms.cern/news/cms-ind...

Double the Higgs, double the mystery! 🕵️🕵️ By studying Higgs boson pairs, CMS scientists are charting new territory in the search for particles far heavier than the ones we know. 📍Read more: cms.cern/news/double-...

🤩 We’re about to go LIVE from the CMS experimental site! Click here to join the tour and ask any questions you'd like our scientists to answer 👉 www.youtube.com/live/7CL6qoN...

Celebrate European Researchers’ Night with us THIS FRIDAY by taking part in our virtual visit, live from the CMS experiment site at CERN! And don't forget - your guides will be two CMS scientists who can answer any of your questions! 👉Register here: indico.cern.ch/event/159198...

@cmsexperiment.bsky.social found in Togo

CMS can now record all 40 million events per second – even those typically filtered out! 📸 The first physics result using data from this novel "triggerless" approach is out, showcasing the immense potential of this technology. 📍Read more: cms.cern/news/how-cms...

Our CMS physicists at CERN are working on something big: the first prototype slice of HGCAL, the largest silicon-based detector ever built. This is a step in the plan of technical upgrade CMS will undergo starting in 2026. 🏆HGCAL Image of the Month 📸Andre David

CMS heavy-ion physicists participated last week in Initial Stages 2025 in Taipei. Thanks to our colleagues across the collaboration for their hard work, and to the IS2025 organisers for hosting such a vibrant exchange of ideas.

A cosmic choreography at the tiniest scales! 🩰 CMS researchers study light-ion collisions, and provide robust evidence of how the shapes of the colliding nuclei guide the collective flow of particles 🌊 📍Read more: cms.cern/news/collect...

Neon lights up the LHC! CMS scientists study the first-ever neon-neon collisions, and comparing to oxygen-oxygen, xenon-xenon, and lead-lead, find interesting insights into quark-gluon plasma – the hottest state of matter🌡️ 📍Read more: cms.cern/news/lhcs-fi...

CMS scientists study the first-ever oxygen–oxygen collisions at the LHC and find the first signs in light-ion collisions of quark–gluon plasma – the state of matter that filled the universe just after the Big Bang 💥 Read more: cms.cern/news/lhcs-fi...

CMS deepens our understanding of the early #universe by studying the first ever oxygen-oxygen and neon-neon collisions at the #LHC! With the effort of the whole group, results from these unique collisions are already being shared at major conferences. Read more here 👉 cms.cern/news/cms-ini...

✨Turning light into heavy force carriers: For the first time, CMS has observed two photons fusing to create a pair of W bosons! Read the full physics briefing to find out more: cms.cern/news/when-li... #physics #physicsnews #science #research

🤩 In a first-of-its-kind search at the LHC, CMS probed Higgs boson decays to new light particles that give charged hadrons and muons. The results: such decays, if they occur at all, are limited to less than 0.01% of all Higgs boson decays. Read more: cms.cern/news/hunting... #physics #research

Meet Annabel, Walter and Amal — just a few of this year's CERN (@cern.bsky.social) summer students working with the CMS experiment — and get an inside look at their incredible experience! 📽️Watch here: youtu.be/pSKtNaNbZ9w

CMS presents its most precise and comprehensive measurement of the Higgs boson yet! 📏 Read more about how combining different studies made this remarkable result possible: cms.cern/news/pieces-...

On the hunt for an ungovernable heavy boson 🕵️ CMS investigates Z boson decays which would rebel against the established behavior of lepton-flavor conservation. 👉Read more: cms.cern/news/hunt-ru...