CMS Experiment at CERN
@cmsexperiment.bsky.social
The CMS Experiment at CERN! Follow us as we study the fundamentals of the universe...
Find all our links here --> https://linktr.ee/cmsexperiment
Find all our links here --> https://linktr.ee/cmsexperiment
@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.
November 21, 2025 at 2:28 PM
@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?...
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?...
November 20, 2025 at 2:16 PM
🗨️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?...
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?...
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 🌈
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 🌈
November 18, 2025 at 1:55 PM
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 🌈
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
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
November 18, 2025 at 8:59 AM
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
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...
November 12, 2025 at 1:31 PM
👉 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.
November 11, 2025 at 10:23 AM
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
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
November 7, 2025 at 4:08 PM
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
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...
➡ Read more: cms.cern/news/cms-phy...
November 6, 2025 at 4:08 PM
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...
➡ Read more: cms.cern/news/cms-phy...
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
🏆 MTD Image of the Month
📸 Nefeli Stathaki
November 4, 2025 at 1:39 PM
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
🏆 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...
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...
November 3, 2025 at 4:54 PM
👂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...
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...
🥇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...
Read the full briefing here: cms.cern/news/cms-obs...
October 27, 2025 at 12:06 PM
🥇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...
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
😍This is what the CMS detector captures during events such as these! 😍
🎞️Tom McCauley
October 23, 2025 at 12:41 PM
🤯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
😍This is what the CMS detector captures during events such as these! 😍
🎞️Tom McCauley
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...
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...
October 20, 2025 at 1:16 PM
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...
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...
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
👉 Read more: cms.cern/news/using-p...
#physics
October 10, 2025 at 1:48 PM
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
👉 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
🏆HGCAL Image of the Month
📸Florian Baudette
October 9, 2025 at 2:32 PM
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
🏆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...
📍Read more: cms.cern/news/clash-t...
October 8, 2025 at 8:20 AM
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...
📍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
October 7, 2025 at 2:43 PM
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...
🔗Find out more, including a video of the winners answering questions: cms.cern/news/cms-phd...
October 7, 2025 at 2:06 PM
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...
🔗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...
🗞️Find out more about it here: cms.cern/news/cms-ind...
October 2, 2025 at 11:47 AM
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...
🗞️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-...
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-...
September 30, 2025 at 2:51 PM
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-...
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-...
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...
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...
September 24, 2025 at 3:25 PM
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...
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...
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...
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...
September 23, 2025 at 9:52 AM
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...
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
🏆HGCAL Image of the Month
📸Andre David
September 22, 2025 at 9:59 AM
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
🏆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.
Thanks to our colleagues across the collaboration for their hard work, and to the IS2025 organisers for hosting such a vibrant exchange of ideas.
September 19, 2025 at 1:16 PM
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.
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...
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...
September 18, 2025 at 2:24 PM
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...
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...