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...

Did you miss the recent ‘Progress in Physics’ article featuring a CMS result on quantum entanglement in top quark–antiquark pairs? Read it on Physics World: physicsworld.com/a/probing-qu... #Science #CERN #sciencenews #physics

A novel probe of the Higgs-charm interaction: CMS researchers take a first look at W boson charge asymmetry produced in association with a Higgs boson. 📌Read more: cms.cern/news/cms-mea...

CMS has completed a new Data Acquisition System (DAQ) room! This room is key to increasing the data processing capacity from 2 Tb/s to 50 Tb/s for Run 4 — roughly 500,000 times more than a typical household fibre-optic internet connection. Read more: cms.cern/news/cms-com... #science #CERN

CMS' Marina Passaseo interviews Barbara Storaci and Sarah Seif El-Nasr about their journey from particle physics at #CERN to working in sports at #UEFA! 🎙️ Hear how #science gave them confidence on and off the pitch. Watch the full video here: youtu.be/TgSci4JSdaI #sports #physics #football

An Optical Trigger MotherBoard for the Cathode Strip Chamber that enables communication with another muon detector, the Gas Electron Multiplier. The integrated triggering system enhances muon detection by combining data from both detectors. 🏆 Muon Image of the Month 📸 D. Morse

This is one of the five double disks for each of the two Tracker Endcap Double Disks (TEDD), being built for Hi-Lumi LHC. Each disk is made up of two half-disks or "Dees". Two disks, separated by around 2 cm, form a double disk! 🏆 Tracker Image of the Month 📸 A. Mussgiller #science #particlephysics

How do you weigh the W boson using hadrons? ⚖️⚛️ For the first time ever at a hadron collider, CMS has managed to do it! Read more: cms.cern/news/how-wei...

🚀 In hot pursuit of supersymmetry: CMS explores a wide range of final states with boosted particles using a razor-sharp analysis. The result? One of the most comprehensive searches for supersymmetry yet. Read more: cms.cern/news/all-rou... #science #physics #experiment

Our kind of biscuit tray — but with hexaboards for the future High Granularity Calorimeter (HGCAL), planned for the Hi-Lumi LHC upgrade. The increased granularity of HGCAL will help better distinguish signals from different particles.⚛️ 🏆 HGCAL Image of the Month 📸 HGCAL team #CERN #science #physics

All credits to CMS detector & collaboration! 📸 These event displays are visual representations of particle collisions, reconstructed from signals recorded by CMS. As particles pass through detector, they leave traces, which are processed & transformed into stunning displays by specialised software.

One photon short! CMS breaks new ground by using AI to hunt for exotic Higgs boson decays. ⚛️ Read more: cms.cern/news/one-pho... #CERN #CMSexperiment #physics #science #HiggsBoson #particlephysics

What are conference talks actually like? Listen to CMS' physics coordinator, Roberto Salerno, as he explains how CMS is pushing the boundaries of physics in his talk at the EPS Conference 2025. ⚛️ www.youtube.com/watch?v=nBbG...

🤔Could the Higgs boson have a shadowy cousin? CMS is pushing boundaries with #AI in the search for the dark Higgs – a potential link to #darkmatter 😲 👉To find out more about this study, read the physics briefing on our website: cms.cern/news/higgs-b... #physics #physicsnews #particlephysics

This tray is part of the CMS MIP Timing Detector (MTD), to be installed around the Tracker for the Hi-Lumi LHC upgrade. With ~35 ps time resolution, it will help CMS maintain event reconstruction accuracy even with 5x more collisions. 🏆MTD Image of the Month 📸A. Benaglia

✨Top Quark: The Lone Traveller✨ In the latest episode of the top quark saga, CMS reveals for the first time how a single top quark is produced in a mode called "t-channel" in a new, uncharted territory: 5.02 TeV! Read the CMS physics briefing for more: cms.cern/news/top-qua...

The 2025 European Physical Society (EPS) Conference on High Energy Physics took place in Marseille from 7th to 11th July 2025, and CMS was there, represented by many scientists and posters! Can our scientists explain their research in less than one minute? Let’s find out: youtu.be/_DuzMO4hKP0?...