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@CMSExperiment
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Official account of the CMS Experiment at @CERN . Also on instagram as @cmsexperiment ! Science papers: @cmspapers
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Joined November 2009
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Peter Higgs (1929-2024) played a major role in the motivation for the LHC,
@CMSExperiment
and
@ATLASexperiment
. The discovery of the
#Higgs
boson in 2012 laid the groundwork for a completely new area of physics studies. The CMS collaboration will be forever grateful.
@CERN
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🎂🎊🌟🍰 🎉Happy
#HiggsBoson
Day!🎂🎊🌟🍰 🎉
#onthisday
9 years ago the CMS and
@ATLASexperiment
at
@CERN
made the amazing announcement that the Higgs boson was discovered!
10
219
723
🎉🎂 Happy
#Higgs
Boson Day! It's been 7 years since CMS and
@ATLASexperiment
at
@CERN
confirmed the existence of the new particle! 🎊🎈
Character created by Carolina Deluca
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Today is the 6th year anniversary of the discovery of the Higgs boson by CMS and
@ATLASexperiment
at
@CERN
. Happy Higgs Day!
#Hi6GS
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On Friday, scientists from the CMS experiment at CERN's Large Hadron Collider released their 1000th paper 🥳
This achievement reflects an exceptional contribution to humanity's understanding of the universe, and it's just the beginning!
#cmspaper1000
👉
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For the first time the CMS Collaboration demonstrates evidence that top quarks are produced in nucleus-nucleus collisions!
Read more how the top quark interacts with the heavy metal 🎸💥🎸 of the lead-lead collisions in this CMS physics briefing: ➡️
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Quarks and electrons (and their siblings) are fundamental particles⚛️, meaning to our current best knowledge they cannot be split further.
But what if we are wrong, and quarks are composite, so made of other undiscovered particles 🎊🎊?
Read more:
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The Higgs particle is the result of the Higgs field. But how could we check that? This new CMS paper takes the next step towards measuring the Higgs field: searching for the production of not one but two 🔗 Higgs particles simultaneously! 🤯
Read more ➡️
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CMS is undergoing massive upgrades in the next two years. In addition to maintenance and the detector upgrades for Run 3, CMS is already preparing for the 10x increase in collision rate coming in the future with the High-Luminosity LHC:
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The Higgs boson has come a long way since its discovery in 2012. The CMS Collaboration now has about 400 Higgs bosons in the Golden four-lepton channel (2012:only 10). We use these to measure the different ways the Higgs is produced!
Read more:
#LHCP2021
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Complete replacement of the CMS beam pipe is planned during the recently started two year maintenance period. 🛠️ 👷♀️👷 The key motivation is to make it compatible with the geometry of the future CMS pixel detector:
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Undiscovered particles/physics beyond the standard model can change particle's decays into other particles. For that reason, at
#ICHEP2020
, we also look for what should not be visible yet:
#Higgsboson
decaying to a Z boson and a meson
read more:
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The first event display with “stable beams” in CMS is here!
#13TeV
http://t.co/biCo4VzL4I
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Much like the winding fjords of Norway and the Mandelbrot set, the interactions of quarks and gluons give rise to the tiniest fractals in Nature: jets within jets within jets…
Find out more! ➡️
#moriond
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CMS measures Higgs boson’s mass with unprecedented precision
8
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The
#LHC
has begun colliding heavy ions and CMS has started the heavy-ion data taking run. What are we going to study with these collisions?
11
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For the first time at a hadron collider (& better than previous colliders!), CMS has measured the shape of b quark jets 💥
The jets from b quarks are key for studying the Higgs boson, top quarks and searches for new particles 🔍
Read more ▶️
#LHCP2021
11
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252
Celebrating
#MayTheForceBeWithYou
, CMS has reached another major milestone of LS2 🏗️ . The new beam pipe has been installed right at the heart of the CMS detector ❤️🛠️! Read our newest news article to explore how the beam pipe has been changed➡️
@CERN
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[CMS Physics Briefing]: The CMS experiment releases new results studying an extremely rare decay of the B_s meson, to a μ+μ- pair, long considered a holy grail of particle physics! This meson is a bound state of a strange quark and a beauty antiquark
1
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A successful four years of CMS detector operation came to an end last week and we are now beginning a new chapter. The coming two-years of Long Shutdown (LS2) will allow for major upgrades of CMS, some of them already preparing the detector for
#HiLumiLHC
.
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CMS hunts for dark photons coming from the Higgs boson
3
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🔔 The wait is over!
LHC Run 3 started today!
CMS recorded the first collisions of the Run 3 at the world record energy of 13.6 trillion electronvolts (TeV).
Stay tuned to know what CMS explores in this newly started physics-data taking period.⚛️
#CERN
#CMSExperiment
#LHCRun3
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[CMS Physics Briefing]: How charming is the Higgs? For
#EPSHEP2019
, the CMS collaboration has for the first time carried out a direct search for a Higgs boson decaying into charm quarks!
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Using data from LHC collisions recorded in 2016 and 2017, the CMS Collaboration observes a very rare mechanism of producing top quarks, in which a single top quark is produced together with a Z boson.
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Bernadette and Howard's apartment now has a 3D-printed model of our detector!
Screenshot courtesy of
@BigBang_CBS
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It's not easy to measure electrons and photons at the LHC and we need these particles to study more elusive particles. For example, one way to see the Higgs Boson is by finding two photons 🔎💡💡🔍
Want to learn how we find electrons and photons? 🔆▶️
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Here are some event displays from the
#RestartLHC
splash events just seen by CMS!
http://t.co/XhRBfpPXQr
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For the first time, CMS physicists have discovered that the LHC can produce combinations of three W or Z particles in one collision. This opens up a new way to search for new physics beyond the standard model
Read more in the physics briefing:
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🚨CMS has been preparing for something big… stay tuned to keep up to date.
[1/6]
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Look 🆙
The M in CMS stands for Muon, and Archana tells us about a new part of the CMS detector that looks for these muons! 🔎
Did you know that there are 144 of these GEM detectors inside CMS?
#CERNScienceGateway
@CERN
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How many collisions are actually there when bunches of protons collide inside the LHC💭? Discover how physicists have developed new methods that give excellent precision when counting such collisions🤩🆕.
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CMS continues to search for the W’ boson in unexplored territories: new mass regions are probed for W' bosons decaying to a top quark and a bottom quark.
The measurements hint at exciting possibilities to be further studied with more Run 3 data. 📌
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One month ago we had the first CERN 360 live, from the CMS experiment!😍
🎥If you missed it, watch the recording and immerse yourself in CMS experimental cavern 100m underground to discover what we're doing while the LHC is being upgraded 🚧
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At the ICHEP conference in 2012 the discovery of the Higgs boson was announced. And for
#ICHEP2020
CMS Collaboration presents the first evidence of the Higgs boson interacting with the muon!
Read more in our briefing for the general public:
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🔔
@CERN
is
#RestartingLHC
and CMS is again lightened up!💡🏁
CMS just recorded splash events that happen when the path of beams is obstructed by one-meter-thick "collimator", resulting in a spray of particles travelling further to the detector as one huge "splash" of particles.
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🗝️ Unlocking secrets of the dark! Scientists at the CMS Experiment probe the ‘Hidden Valley’ for evidence of a dark world of invisible particles. Read more to discover the latest results:
#physics
#physicsnews
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[physics briefing]: Examination of the Higgs boson decaying to photons when produced alongside a top quark and antiquark allows the measurement of an important property of the Higgs connected to the matter-antimatter asymmetry in the Universe 🤓
Read more
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There can be Higgs bosons in Nature other than the one discovered at the
#LHC
🧐. The CMS Collaboration is looking for them with the help of top quarks!
➡ Read the briefing that is released in the occasion of
#eps2023
:
#EPSHEP2023
#AcademicTwitter
8
47
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The
#LHCRun3
@CERN
has officially started! 🚀
The CMS experiment is on its way to explore new undiscovered territories of particle physics.⚛️
Find more:
#CERN
#CMSExperiment
#LHC
#Particlephysics
17
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After the LHC shutting down, one might think we can sit back and relax. On the contrary, CMS will undergo an intensive upgrade and maintenance program during the two-year long break. The first step is the extraction of the pixel detector:
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Happy Pi Day! ⭕️
3.14 is an irrational number, but it is around us everywhere!
CMS is no exception!
#PiDay
#piDay2023
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🤩🌟Take a look at the heart of the CMS detector! 🤩🌟
The Pixel Tracker is now installed and ready for commissioning!
8
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194
Make sure to register for the final Open Virtual Visit of the year! 😍
⚠️ Two CMS scientists will guide you to places where no visitor is allowed! Registrations are open for everyone:
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What's the special recipe for discovering new physics? 🥣📃
Watch the video to know...We have also shared the secret ingredient!🧂😉
🎵 by
#particlephysics
#science
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🪡 Needles in haystacks are easy… finding evidence for the tWZ process is much harder - and yet! CMS sees first evidence for this elusive process of a top quark, a W boson and a Z boson production!
#LHCP2023
#AcademicTwitter
➡️Learn more here:
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[physics briefing]: CMS has discovered extremely rare collisions where the Large Hadron Collider is working as a boson-boson collider⏭️🌟⏮️
These can teach us about the nature of the Higgs boson and at which energy the Standard Model breaks down 🔨💔🔨
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Only three in a million Higgs bosons decay to a J/psi and a photon - CMS researchers are looking for these incredibly rare decays, using the J/psi decay in two muons! Read how:
@CERN
#academictwitter
#Physics
#particlephysics
#physicsnews
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The running of the top quark mass, an important consequence of the quantum-field theory of nature, has been studied by CMS!
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Have a glimpse behind the scenes of the beam pipe installation at the CMS experiment
@CERN
🛠️💥 Read more here➡️
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And we have animations as well! YouTube link for high-res video:
#13TeV
http://t.co/Iv5Yzrps6r
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Also at
#moriond
: CMS has recently released a new paper that pushes far into the unexplored high mass region of pairs of very energetic electrons or muons, in the hopes of discovering new particles or forces.
Read more about what, why and how:
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👷♀️ 👷♂️The CMS muon system is being upgraded to help track muons with ever-higher precision. 🎯
#upgradingLHC
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Immediately after 18 March, the CMS experiment was brought into a safe state for the
#COVID19
closure.
Now we are preparing for the restart.💪
⬇️Here's our restart preparation plan ⬇️
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What if there are new particles that would create two Higgs bosons?
H ⬅️🎁 ➡️ H
A new CMS result searches for such new particles 🎁, that create twice the Higgs, so twice the fun!
Read more:
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43
170
Congratulations to the
@CERN
#LHC
colleagues for the test collisions at
#13TeV
. These are useful for us!
#RestartLHC
http://t.co/QRCVdWujJp
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📣A new era in calorimetry
🆕The CMS collaboration is designing and testing new silicon sensors for the detector's High Granularity calorimeter, capable to withstand higher radiation, to prepare for the
#HiLumiLHC
.👇
Read more:
2
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172
Happy snowflakes ❄️❄️❄️ from the CMS experiment!
2
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168
💥Last week CMS recorded test collisions happening at the
#LHC
@CERN
These tell scientists the detector and all of its components are working together in the expected way. ⚙️💯
Such checks are important steps toward the start of Run3 next year!
#CMSexperiment
#physics
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If detectable new particles decay to unseen new particles inside the CMS detector, a very striking signature would be observed: a 'disappearing track'!
CMS has carried out a new search for this distinct signature, read more in the new physics briefing:
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"Hey Siri, where did I put my new exotic particles?" 🔬🔍
CMS physicists use
#machinelearning
#AI
to search for difficult to identify new particles. Read more in the physics briefing:
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Searching for matter–antimatter asymmetry in the Higgs boson–top quark interaction - in CMS and
@ATLASexperiment
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The CMS detector lights up when the LHC makes a 💥beam splash💥 and many many muons move horizontally through the experiment. These muons leave signals in the electromagnetic calorimeter 💚 and hadronic calorimeter 💙
Read more:
👉 👈
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Always on the hunt for new particles!
For the first time, the CMS Collaboration has performed a search targeting singly produced vector-like quark decaying to a top quark and a Higgs boson. ⚛️
Read more:
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163
👂Listen carefully to the quark-gluon plasma!
Sound passes very fast. CMS physicists have measured, with unparalleled precision, the speed of sound in the fluid-like quark-gluon plasma medium.
⏩Read more:
@CERN
#sciencenews
#AcademicTwitter
1
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150
🎉 The CMS physics programme started on this day 10 years ago, when the
@CERN
LHC collided protons at record energy of 7 TeV for the first time and CMS successfully detected these collisions. 👏
#10yearsofLHCphysics
#particlephysics
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Did you know❓
At the LHC top quark pairs are produced slightly asymmetrically. CMS measures the angular distribution to see if new particles enhance this effect. ⚛️
Read more:
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Did you ever wonder how physicists 'see' quarks move inside protons? One way is to use a Z boson produced at the LHC to measure their speed! It can also measure how long the interaction takes to occur, like a slow-motion camera. Read the recent CMS result!
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162
The old CMS beam pipe will be mined for magnetic monopoles. The CMS collaboration will install a new beam pipe the long technical stop in 2019 and 2020, so the old one gets to contribute to science a different way
#recycling
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🎉Let the party begin! Today we celebrate CMS
#birthday
and you are all invited! 🥳🍰
🎈Watch the video to relive the 30 years of CMS' history through 30 photos
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A recent result from CMS explores the so-called “Higgs portal” in a way no one has gone before: with long-lived particles!
Read more on how to live long and prosper by searching for the long-lived relatives of the Higgs boson:
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160
Celebrate with the
@CMSExperiment
and the
@ATLASexperiment
the
#higgs
boson discovery anniversary! Eleven years since that unforgettable moment
@CERN
!
Artistic representation by Marta Tornago
#anniversary
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Taking steps toward HL-LHC, CMS completed the installation of new prototypes of improved Resistive Plate Chambers.🔧⚙️ All the newly installed iRPC demonstrators will be tested in real CMS conditions with high magnetic field during Run3!🧲
Read more:
11
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156
Does every particle have a superpartner? With the help of the heaviest lepton, the tau, the CMS experiment continues to probe the secrets of the universe.
Find out more:
@CERN
#academictwitter
#physics
#cern
#particlephysics
3
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Will you “Stop” if you find yourself in an impossible corner?! Well, CMS did not 😉
In a recent result, we look for the supersymmetric partner of the top quark, Stop, in mass regimes that are not easily accessible. Learn more
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Neutrinos are the most intriguing elementary particles. The Standard Model of particle physics has no explanation for their masses.
CMS examined alternative explanations, like the seesaw neutrino models, opening a new window in the LHC’s data exploration.
11
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Muons tracks in a detector far far away.⚛️
#MayThe4thBeWithYou
!
A recent CMS result looks for the production of exotic particles decaying away from the beam collision region, creating pairs of muons that appear to not come from the center of the detector.
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Ice cream cones with three different flavours is something everyone likes!🍦 Read our new briefing to find out how a new technique to measure the top quark's properties is more like ice cream than you might expect⚛️
#CERN
#CMSExperiment
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One big jet with undetectable particles (red arrow) going in the other direction is one of the signatures CMS physicists use to search for
#darkmatter
at the LHC
CMS has released a new search for dark matter for the
#LHCP2021
conference.
More info:
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150
🥇The first two Gas Electron Multiplier (GEM) superchambers have been successfully installed inside the CMS detector. 🏗This brand new subsystem will form an extra layer of detectors closest to the beam.
#upgradingLHC
Enjoy the photo essay 👇
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The plot thickens! 🧐 CMS searches for tau leptons decaying into 3 muons to investigate the violation of lepton flavour conservation. 🤔
Read how the mystery unfolds:
#CERN
@CERN
#physics
#physicsnews
7
30
148
Eleven years ago today, the Higgs boson observation was announced.
🤔 What if there were a second and lighter Higgs boson?
That discovery would be an unequivocal sign of new physics, and CMS is exploring it! 🤩
Learn about the recent search:
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Suppose that you need to see inside a small room that is difficult to access. Thick walls, no electricity, you cannot dig, and the closest that you can get to the target is inside a narrow tunnel. Fundamental physics may come to the rescue. ⛑️ 🛠️
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The CMS and ATLAS experiment announce the first interaction of the Higgs boson with particles from the second generation. With three sigma evidence for Higgs decay to two muons by CMS
3
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The discovery of the Higgs Boson was 10 years ago!⚛️ How much have we learned about the
#Higgs
boson?
Watch the full video on YouTube:
📹Here's a preview of our video with CMS scientists. 🔊 SOUND ON!
#CERN
#CMSExperiment
#Higgs10
#Higgsboson
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Never before seen η meson decay into four muons - CMS Collaboration analysis reveals what the η meson does when nobody's looking! And you really need to look very hard, as this only happens five times in every billion decays. Find out how it was done 👉
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Now submitted to the Journal of High Energy Physics: First evidence for the Higgs boson decaying to muons. Read more about why this is such an important result in our CMS physics briefing for the general public:
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Discover how the CMS silicon tracking system's 20 thousand sensors are aligned to reconstruct tracks of charged particles with the best possible resolution! 📏⚛️
#CERN
#CMSExperiment
#particlephysics
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Animations of
#13TeV
tuning collisions, as promised! On YouTube: and
http://t.co/MsCAu3eSgA
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🔔 It’s
@WomenScienceDay
! We are launching a new video series where some of the women of CMS
@CERN
share their stories in their mother tongue. Get Inspired! ➡️
#WomenInScience
#GirlsInScience
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