CMS and ATLAS recognise longstanding industrial partner Hamamatsu Photonics K.K. through the 2026 Industrial Award. Congratulations to this exemplary partnership of science and industry! Find out more: cms.cern/news/cms-and...

Do energetic particles prefer one direction as they traverse the dense medium in light-ion collisions? ⬅️↕️➡️ Read more: cms.cern/news/cms-map...

How does the charm quark clear its way through the dense quark-gluon plasma? 🔎The CMS Experiment at #CERN investigates: cms.cern/news/probing...

Exploring the frontiers of long-lived particles at LLP2026 in Cambridge! 🇬🇧 The CMS group shares their latest results with theorists and other experiments - rare signatures with dedicated reconstruction and triggers, a challenging exploration of exotic physics.

What happens when a particle speeds through some of the hottest matter in the universe?🌡️ CMS reports the first observation of a “wake” created by a fast-moving parton in quark-gluon plasma. 📍Read more: cms.cern/news/wake-pa...

⁉️Where did all the antimatter in our universe go? By studying its largest sample of B mesons to date, CMS is taking a precise look at one of the biggest mysteries in physics. Read more in our physics briefing: cms.cern/news/where-d...

29th of June 2026 saw the end of the LHC Run 3, and the end of the LHC as we know it! The next time CMS records particle collisions, it will be in 2030, provided by the HL-LHC, and from a very different detector to what we have today. Read more: cms.cern/news/end-run-3

CMS reports the first measurement of ϒ (upsilon) mesons in oxygen-oxygen and neon-neon collisions, revealing strong evidence that even light-ion collisions can create droplets of quark-gluon plasma. Read more in our full briefing: cms.cern/news/y-meson...

Science&Art at School! Find out more about this programme, local to CERN here: cms.cern/news/science...

The CMS Experiment is announcing several new, interesting results at Hard Probes 2026! As the conference gets underway in Nashville, Tennessee, here's an evolving page featuring a summary a technical description of the highlights: cms.cern/news/cms-har...

The week was about momentum as much as reflection: celebrating how far we have come while turning toward bringing the LHC program to fruition and building the High-Luminosity LHC. A fitting moment to take pride in how far we have come, and to gather energy for the next chapter. 2/2

A quick look back at the June CMS Week, a week where the CMS collaboration came together for a week unlike those before it. With LHC operations drawing to a close and Long Shutdown 3 starting, it was the right moment to take stock — to look back at what we have built and forward to the future 1/2

Three bosons walk onto the stage... CMS explores rare collisions that produce three W or Z bosons at once, searching for unexpected twists that could reveal new physics. 👉 Read the full briefing here: cms.cern/news/looking...

👏Well done to all the CMS students and early career researchers who prepared and presented their posters at the June CMS Week👏 Poster presentations and discussions are key in sharing insights into all areas of an experiment involving over 6000 people!

🏁Ready, Set, Go!🏁 CMSers raced (but no running!) across the detector site last week during CMS Week to complete a unique treasure hunt and learn about the extensive preparation underway for #HiLumi at CMS! ✨Follow us for more on the journey to High Luminosity at CMS✨

CMS celebrated its 2025 awardees, recognising their outstanding contributions to the collaboration! Among them, a team was honoured for their dedication, teamwork, and professionalism, which ensured the successful safeguarding of a critical detector component. ✍️Learn more: cms.cern/news/cms-awa...

Hunting heavy particles 💥 CMS records rare collisions producing the most massive pairs of electrons or muons ever observed, opening new territory in the search for undiscovered heavy particles. 📍Read more: cms.cern/news/hunting...

As the #LHCP2026 conference comes to a close, we want to thank all the CMS participants for their incredible contributions. Beyond the brilliant results presented in the main sessions, CMS also showcased a fantastic lineup of posters 👏

Estranged siblings? 👥 CMS observes evidence of a bottomonium state decaying into mesons, however it finds no sign of its partner. 📍Read more: cms.cern/news/estrang...

🎥🔴We are LIVE! Join the Youtube stream to see the CMS detector: www.youtube.com/live/oXfw-YO...

This is not a goodbye! 👋 Today the CMS shift crew celebrated the last proton collisions of LHC Run 3. The next time CMS will detect again particles from proton collisions will be in four years!

This is your sign to visit the CMS detector from the comfort of home🏡 Join two CMS physicists as they guide you through the experimental site and answer your questions live from 100m underground! ℹ️ Register to be notified when the live stream starts: indico.cern.ch/event/1688958/

The CMS Experiment is announcing 15 new results at LHCP 2026! As the conference gets underway in Paris, here's an evolving page featuring the full list of our results, with a technical description of the highlights. 👉Stay tuned for the upcoming CMS physics briefings! cms.cern/news/cms-lhc...

Ever wonder what a NERD does at CERN? 🤓 PhD student Jessica takes us inside the 2nd Next Generation Triggers Hackathon, where her team worked on the "NERD" demonstrator to revolutionise the High-Level Trigger calibration for HiLumi CMS. 🔗 Read the blog: cylindricalonion.web.cern.ch/blogs/nerd-p...

Twice in a million – CMS reports the first observation of a rare decay of the eta meson into two muons and two electrons, which occurs only twice in one million decays! 👉 Read more in the CMS briefing: cms.cern/news/light-m...

🍀Lucky four-muon clover! CMS sets the world’s most stringent limits on the extremely rare decays of neutral B mesons into four muons. 👉Read more in our physics briefing: cms.cern/news/pushing...

🧐Could the universe be hiding more particles like the Higgs boson? CMS performs a first search for the decay of the Higgs boson into two more Higgs-boson-like particles with unequal masses. Read in our physics briefing more: cms.cern/news/search-...

➰Through the quantum loop! CMS examines rare decays of the Higgs boson into a Z boson and a photon 👉 Read more in our briefing: cms.cern/news/out-loo...

🧐The curious case of quarkonia inside jets. In a first study by CMS, ϒ mesons – bound states of a bottom quark and antiquark – produced inside jets are defying expectations, revealing cracks in our theoretical models. Read our briefing here: cms.cern/news/curious...

🔎From discovery to precision📐: CMS studies the Higgs boson in its cleanest, "golden" channel, using four-lepton events from 2022–2024, reporting production rates as a function of several variables. Read more in our briefing: cms.cern/news/discove...