What is Cern: Definition and 153 Discussions

The European Organization for Nuclear Research (French: Organisation européenne pour la recherche nucléaire), known as CERN (; French pronunciation: [sɛʁn]; derived from the name Conseil européen pour la recherche nucléaire), is a European research organization that operates the largest particle physics laboratory in the world. Established in 1954, the organization is based in a northwest suburb of Geneva on the Franco–Swiss border and has 23 member states. Israel is the only non-European country granted full membership. CERN is an official United Nations Observer.The acronym CERN is also used to refer to the laboratory, which in 2019 had 2,660 scientific, technical, and administrative staff members, and hosted about 12,400 users from institutions in more than 70 countries. In 2016 CERN generated 49 petabytes of data.CERN's main function is to provide the particle accelerators and other infrastructure needed for high-energy physics research – as a result, numerous experiments have been constructed at CERN through international collaborations. CERN is the site of the Large Hadron Collider (LHC), the world's largest and highest-energy particle collider. The main site at Meyrin hosts a large computing facility, which is primarily used to store and analyse data from experiments, as well as simulate events. Researchers need remote access to these facilities, so the lab has historically been a major wide area network hub. CERN is also the birthplace of the World Wide Web.

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  1. T

    I Electron Neutrino Detected, Finally!

    CERN reported that for the first time the Electron Neutrino has been detected. Short & Simple article: https://thedebrief.org/cern-physicists-report-first-direct-detection-of-electron-neutrinos-in-groundbreaking-experiment/ The Technical Paper: (Creative Commons license, downloadable)...
  2. kimi7335

    I The purpose of trigonometric axes in plot of electron clusters, ATLAS

    I have been doing some reading on electron reconstruction from proton-proton collisions at CERN. In some of the papers I have read, plots such as the one In the figure are included. What I would like to know is why they have chosen to plot the x and y axes as cos(phi) * tan(theta) and sin(phi) *...
  3. omerel

    Higgs boson re-discovery from a CERN dataset (for a project)

    Hi everyone! I'm working on a seminar project on elementary particles, and I'm supposed to introduce the LHC and rediscover the Higgs boson from a dataset I got from CERN open source. I don't understand how am I supposed to discover the gap (in the invariant mass diagram) around the Higgs boson...
  4. pinball1970

    Airbus & CERN Partner to Promote Superconducting Tech for Clean Aviation

    https://www.airbus.com/en/newsroom/press-releases/2022-12-airbus-and-cern-to-partner-on-superconducting-technologies-for "Airbus UpNext, a wholly owned subsidiary of Airbus, and CERN, the European Laboratory for Particle Physics, are launching a project to evaluate how superconductivity can...
  5. fresh_42

    I How Will FASERν Transform Our Understanding of Neutrinos at High Energies?

    https://journals.aps.org/prd/pdf/10.1103/PhysRevD.104.L091101 And here is the pop science summary: https://www.sciencealert.com/for-the-first-time-neutrinos-may-have-been-detected-at-the-large-hadron-collider Which results can be expected?
  6. Marilyn67

    A GBAR Experiment (CERN) - Genève

    Hello, My question concerns the (improbable but possible...?) results of the GBAR experiment at CERN which should resume in May 2021, according to my latest information. (delay due to Covid 19). Most scientists (and me too) believe that antimatter behaves the same as matter in a gravity field...
  7. S

    Are ICTP and NORDITA international institutions (like CERN)?

    Are ICTP and NORDITA really international institutions about physics (like CERN) or are they actually an Italian and a Swedish organization respectively?
  8. Dive into ATLAS at CERN for the Global Science Show

    Dive into ATLAS at CERN for the Global Science Show

    Introduction to the research at ATLAS at the LHC
  9. atommo

    B Quantum Micro-Blackholes: Fact or Fiction?

    This is more of a general question than technical (but since its still physics-related I feel it still belongs in this section of the forum). Many of you probably remember back in 2008 the headlines in newspapers threatening CERN would make an 'Earth consuming' black hole - of course that...
  10. Z

    Programs Internship essay for CERN -- Please help

    So I'm applying to the REU through university of Michigan to attend CERN this summer. This is like my DREAM to be at CERN. i just finished writing my essay and I want as much feedback as possible, i really want to get this internship. Please write a single paragraph describing why you would...
  11. YoungPhysicist

    I Closing the Gap: The Evolution of CMS at CERN

    In this picture of CMS, there is a huge gap between the two sides. There is no way that the collision occur directly in midair right? So is the gap already been sealed? ( which means the picture was taken before it started to operate) Or I am completely wrong?
  12. Spinnor

    B Remaining Fraction of Particle Beam After CERN Use

    When Cern is done with a particle beam, what fraction of a typical beam bunch is left having not scattered out of the bunch? Is it of order 1/2? A very rough estimate would do. Edit, I should add that I read an accelerated beam might be used for a day and at the end of the day they dispose of...
  13. S

    B What is the collaborative process behind CERN's particle result modeling?

    Hi all, I was wondering how CERN models their particle results as we see them in images. As I understand it, Heisenberg's Uncertainty Principle tells us that we are unable to precisely observe subatomic or fundamental particles, as the energy would cause its velocity or position to alter. How...
  14. Greg Bernhardt

    Insights Interview with Niels Tuning, LHCb Run Coordinator - Comments

    Greg Bernhardt submitted a new PF Insights post Interview with Niels Tuning, LHCb Run Coordinator Continue reading the Original PF Insights Post.
  15. Wrichik Basu

    "Humpty-Dumpty" particle (Eggeron) discovered at CERN on April 1st, 2018

    As per news from the CERN, the Eggeron or the "Humpty-Dumpty" particle has been discovered. Quoting from the news article: The LHCb experiment at CERN’s Large Hadron Collider (LHC) has announced the discovery of Eggeron ##\eta_{gg}##, familiarly known as the “Humpty Dumpty” particle, the...
  16. mfb

    I LHC finishes proton-proton collisions in 2018

    New year, new thread! Here was 2017. Yesterday the first beams this year circulated in the LHC. As every year, the machine operators start with a single low intensity bunch, checking that everything still works properly, and adjusting some parameters where the conditions changed over the winter...
  17. J

    B Superfluid Helium and its use at CERN

    Hi, Wikipedia says CERN uses 100 gallons of superfluid helium 4 to cool its superconducting magnets. Why use superfluid helium 4 (2K) as apposed to regular liquid helium (4.2K). As far as I can see from Internet sources, the helium serves to keep the magnets in order to keep them in a...
  18. Beyond the Higgs: What's Next for the LHC? - with Harry Cliff

    Beyond the Higgs: What's Next for the LHC? - with Harry Cliff

    Harry Cliff is the Science Museum Fellow of Modern Science, which he reckons might be the only job title which begins and ends with 'science'. He spends half his time searching for signs of new physics at LHCb, one of the four big experiments at CERN's Large Hadron Collider.
  19. Beyond the Higgs: What's Next for the LHC? - with Harry Cliff (Question and Answers)

    Beyond the Higgs: What's Next for the LHC? - with Harry Cliff (Question and Answers)

  20. It's me

    I How can I access event data for LHCb calorimeters?

    I want to do a project using machine learning on the calorimeter event data of the LHCb. How can I access this data? Is it very difficult to navigate your way through the source code on your own?
  21. T

    Explore New Business Fields for Light Sensitive Sensors

    Hey :) I am currently doing a project on university in cooperation with CERN where I have to find new business fields for light sensitive sensors (CMOS) which every camera contains. The special feature is the radiation hardness. So you can use it for example for detecting x-rays or you can use...
  22. A

    I Best way to get an overview of research happening at CERN

    I have to write a research review for my University and I want to write a review on all the current work being done at CERN. Can someone please recommend a good place to start reading papers for this purpose? I read a couple of papers that I found in google scholar but I quickly got lost. Is...
  23. A

    B No new fundamental particles at CERN until today

    I remember reading in some book, that the most important experiments are those that produce negative results: the Michelson-Morley experiment for example. The standard model is complete after the Higgs boson. I believe that if no new particle appears in CERN, it would be one of the greatest...
  24. S

    Programs CERN Summer Program: Acceptance Rate?

    Hello! Does anyone know what is (approximately) the acceptance rate for the CERN Summer Student Program? Thank you!
  25. S

    Admissions CERN Summer Student Program: Boost Your Grad School Application

    Hello! I was wondering how much does being admitted to CERN Summer Student Program counts for applying to a grad school in USA (and I mean adding this to your CV, personal statement and getting a recommendation letter from your mentor there). Like is this considered as more important than an...
  26. infinitebubble

    I CERN n_TOF experiment: 'Age of the Universe'

    Exciting to see CERN coming back to experiments. Of interest is the n_TOF instruments to study the estimated age of the universe through neutron-induced reactions of the 'Rhenium-Osmium'cosmo-chronometer. Anyone have a more detail explanation of how this device works? The rhenium-osmium isotopic...
  27. Arman777

    I Why CERN Energy Level Seems Low?

    I heard that Cern can give particles energy up to ##14TeV## which its like ##2.2430 × 10^{-6}##joules.But it seems so low energy...Why can't we give more energy ? What am I missing Thanks
  28. mfb

    I LHCb observes 5 new particles (excited hadrons)

    Plain old standard model baryons, but 5 at the same time, and with crystal clear peaks in the decay to ##\Xi_c^+ K^-##. Each peak in the figure is a particle never seen before, and the significances of those peaks are about 20 sigma (10 sigma for the 5th one). A broad 6th state might hide around...
  29. S

    Programs Summer Research at CERN or CalTech: Which is the Better Option for Grad School?

    Hello! About summer research at CERN, through their program, what does that involves? I mean I understand there will be lectures and visiting and explanations about how the detectors work and all that. But there will be also actual research to lead to a publication or anything like that? Also...
  30. VNN

    Other My dream/goal is to work at CERN....

    I am hoping to become a physicist... My dream/goal is to work at CERN... Could some one hep me with the follwoing questions: If you work there,is it a nice place to work generally? Are the funding for the experiment stable? What roles do physicist have there? How does the above compare for...
  31. fresh_42

    B FYI Webcast from CERN on 9/30/16 for HS students and laymen

    For all who may be interested: https://indico.cern.ch/event/558022/ It will be most likely more for HS students and laymen than experts or those who are simply curious about the site. Hopefully some students will read this and attend the shows. Edit: For not everybody has to look it up...
  32. N

    B CERN: Why No Supersymmetry or Mini Black Holes?

    Why haven't the seen supersymmetry or mini black holes at the LHC yet even though it has been running at full power for some time? They said these mini back holes were probably happening all the time in out atmosphere so why have they seen none at Cern? Do they need a more powerful collider...
  33. EnumaElish

    CERN discovers new economics particle

    @Evo is this your blog (evonomics)? ;-P Economists Discover Quasi-Equlibriated Economic Sub-Particle The problem economists have explaining the financial crash By Steve Keen CERN has just announced the discovery of a new particle, called the “FERIR”. This is not a fundamental particle of...
  34. Greg Bernhardt

    B CERN releases 300TB of LHC data to public

    Ok, who has a spare super computer? http://cms.web.cern.ch/news/cms-releases-new-batch-research-data-lhc What is there motivation for this and realistically what can come from it?
  35. M

    Other CERN vs Fermilab: Which is Better for Theoretical Physicists?

    As a theoretical physicist, what is a better facility to work at? (based on the following criteria) Job stability Access to new research Freedom of work (Any field) Better colleagues Better Tech/Equipment Better pay (not that important)
  36. Justice Hunter

    B Have New Particles Beyond the Higgs Been Discovered at CERN?

    Just curious. Does anyone have the "inside scoop" about whether they have found any particle's yet beyond the Higgs at the LHC? By other particles, I'm talking about super-symmetry. Thanks in advance,
  37. CERN Alice Experiment

    CERN Alice Experiment

    10 min video for general public, describing the physics aims of the ALICE experiment: the study of the primordial state of matter, the quark gluon plasma and more.
  38. LHCb - The Beauty Experiment

    LHCb - The Beauty Experiment

    A short documentary on the LHCb experiment at CERN, on the quest for the mystery of Antimatter.
  39. An introduction to the CMS Experiment at CERN

    An introduction to the CMS Experiment at CERN

    In this video, the CMS detector at CERN's Large Hadron Collider is introduced, describing its construction and history as well as its physics goals.
  40. Fred Wright

    A CERN fails to confirm Fermilab tetraquark discovery-why?

    CERN recently announced (http://cds.cern.ch/record/2140095/) a null result for the X(5568) tetraquark which Fermilab has announced (http://arxiv.org/abs/1602.07588) it discovered with a statistical significance of 5.1sigma. This is very disturbing to me. Why is this? I am not an expert on...
  41. C

    Can electro-weak unification be tested at CERN?

    1.- Electroweak interaction broke its symmetry about 1ps after the Big Bang and two different types of interactions appeared: weak interactions and electrodynamics. 2.- The LHC at Geneva is routinely conducting experiments above the energy threshold of electroweak unification. Could these...
  42. J

    What Are Some Major Research Facilities Like CERN in the US and Europe?

    Hi all! I was wondering if there are any other notable facilities, research organisations or institutes that is similar to CERN, preferably in the US or somewhere else in Europe? Of similar scale or importance, not necessarily in the field of particle physics!
  43. Dayman

    Summer Internships (international)

    I'm a Junior International Student studying Physics and Econ at the University of Texas at Austin, just wondering if anyone here got into CERN, Fermi Lab or the UCLA internship(or other physics internship open to internationals!), what was your resume/gpa/credentials like when you applied? Just...
  44. O

    Dark matter particle search at CERN vs cosmology simulations

    Dark matter particle candidates are being searched at CERN and the various dark matter models are being probed by cosmological simulations. The usual way to probe models via cosmology is to plug a candidate into a cosmological simulation and then compare the results with observations. Yet...
  45. Moelf

    Schools Choice for particle physics between LAC and university

    Hi guys, I don't know if there's any similar thread (I didn't find any, but in case I missed it); if so please suggest them to me. It's time to apply to college again. I personally think particle physics (experimental) would be my top choice (I understand that only phd has the specialized...
  46. QuantumKangaroo

    Difference between Photons and the Higgs Boson?

    I'm new to quantum physics, and this might be a stupid question. What is the difference between Photons and the Higgs Boson? I know that neither of them interact with the Higgs field. And that when CERN found the Higgs Boson, it decayed into other particles INCLUDING photons. So what's the...
  47. N

    Higgs particle and standard model Higgs particle difference?

    Hey physics enthusiasts, I have been reading and watching various videos, which talks about the possibility that the Higgs particle which was discovered by collisions in the large hadron collider(LHC) may not be the standard model Higgs particle. What does this mean? What is the difference...
  48. e.bar.goum

    Why do high energy accelerators have to be so large?

    Today is an exciting day, for today will see a new record for the highest energy collisions at the LHC - stable 13 TeV collisions for new physics, signalling the start of the new physics program at the LHC! There are a few ways you can keep track of progress throughout the day. The LHC status...
  49. Domenico94

    Exploring Magnets & NMR Schemes in Physics II

    Hi everyone...I'm just looking nmr schemes, and magnets, and, at the same time, studying Physics II and electromagnetic fields at my faculty of electronics engineering. I know this may sound like a "dumb" question, and I don't want to sound like councited or similar stuff, but I was just asking...
  50. M

    CERN Alice Particle spectra behavior

    So i have a question regarding the nature of the particle spectre at alice as a function of momentum. The spectre in question can be seen here. http://cerncourier.com/cws/article/cern/48325. My question is, why is it that the particle in the low momentum range are rising and the reaching a...