What is Lhc: Definition and 326 Discussions

The Large Hadron Collider (LHC) is the world's largest and highest-energy particle collider. It was built by the European Organization for Nuclear Research (CERN) between 1998 and 2008 in collaboration with over 10,000 scientists and hundreds of universities and laboratories, as well as more than 100 countries. It lies in a tunnel 27 kilometres (17 mi) in circumference and as deep as 175 metres (574 ft) beneath the France–Switzerland border near Geneva.
The first collisions were achieved in 2010 at an energy of 3.5 teraelectronvolts (TeV) per beam, about four times the previous world record. After upgrades it reached 6.5 TeV per beam (13 TeV total collision energy, the present world record). At the end of 2018, it entered a two-year shutdown period for further upgrades.
The collider has four crossing points, around which are positioned seven detectors, each designed for certain kinds of research. The LHC primarily collides proton beams, but it can also use beams of heavy ions: lead–lead collisions and proton–lead collisions are typically done for one month per year. The aim of the LHC's detectors is to allow physicists to test the predictions of different theories of particle physics, including measuring the properties of the Higgs boson and searching for the large family of new particles predicted by supersymmetric theories, as well as other unsolved questions of physics.

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  1. M

    History What Will the Large Hadron Collider Uncover Next?

    The Next Big Bang Premieres Sunday, March 16th at 8:00pm EST on The History Channel (Check local listings for other dates and times.) This year, the largest, most powerful science experiment in history will be turned on. The "Large Hadron Collider" at the CERN laboratory in Geneva Switzerland...
  2. O

    R-Hadrons at LHC: Detector Signatures of Technicolor SMP

    I am working on the detector signatures of charged (doubly) massive stable particle from a techicolor model; the particle is a baryonic object (bound state of two U-type techniquarks) and is therefore color-neutral, so I would assume that it would only appear as a heavy charged lepton. However...
  3. ZapperZ

    Unveiling the Significance of BCS Theory: Celebrating 50 Years at CERN

    This is the text of the http://cerncourier.com/cws/article/cern/32522" at the recent celebration to commemorate the 50th Anniversary of the BCS Theory of Superconductivity. Considering it came from him, it should smash once and for all, the silly notion that condensed matter physics does not...
  4. D

    Exploring the Standard Model at the LHC

    So, what will we see at the LHC if the Standard Model is all that there is to physics at this energy scale? What if there is no supersymmetry, no strings, no loops (or at least no emergent behavior that would be seen here)? Are we going to be able to tell if those theories are false pretty...
  5. I

    Exploring LHC Experiments & Hawking Radiation's Effects on Time-Space

    I'm sure that everyone is familiar with the Large Hadron colider under construction at CERN I am just curious about the hawking radiation that is to be produced to reveal the extra dimensions that are theorized by string theory. Hawking radiation as I understand it evaporates because of it's...
  6. scupydog

    Can the LHC Detect Gravitons and Reveal New Physics?

    Does anyone know if the LHC could detect the graviton thx
  7. Demystifier

    LHC, supersymmetry and strings

    One of the things that LHC will experimentally search for are supersymmetric partners of the Standard-Model particles. Maybe it will found them, maybe it will not. But what if it will? The existence of supersymmetry does not imply the existence of superstrings. However, string theory is...
  8. L

    Dangers of the Large Hadron Collider: Is James Worried About Nothing?

    Hi i was just wondering what the possible dangers of the LHC (Large Hadron Collider) were? I've heard that there could be the creation of miniture black holes, which sounds to me like a bad idea! i take it that they could grow! I know people say that they will evaporate, but what if their...
  9. M

    LHC to skip low-energy test runs

    The Large Hadron Collider will not be ready in time to perform a low-energy "engineering run", which was originally scheduled to take place this November, according to an official at CERN. This will leave the operators no chance to gain experience with the particle accelerator's steering and...
  10. H

    LHC Doomsday Scenarios: Questions & Answers

    I'm not sure how much this has been covered on this board, but I have a few questions regarding the hypothetical doomsday scenarios involving the LHC. 1) I've heard that mini-black holes could be created at LHC, but that they are supposed to evaporate. How can we be sure that they will? Is it...
  11. marcus

    What energy density expected at LHC point of collision?

    I'm more used to seeing colliders rated by the kinetic energy of the colliding particles, but just recently I've been seeing estimates of the ENERGY DENSITY to be expected right at the point of collision. This raises doubts about exactly what is meant. what is the nominal area of collision...
  12. E

    If LHC does not see SUSY-partners, would these falsify SUSY as an explanation for hie

    If LHC does not see SUSY-partners, of course, this null result would not falsify all SUSY theories, as some SUSY theories could still be realized in nature at a breaking scale some point above 1 TEV, but would a null result falsify SUSY theories that serve as an explanation for hierarchy of the...
  13. T

    LHC & Bunch Crossing: Exploring the Why & How

    I was reading about the LHC and came across the term "bunch crossing" in this sentence "The bunch crossing time will be 25ns and at full luminosity there will be approximately 22 proton-proton collisions per bunch crossing. " It seems obvious that this means the protons are coming in bunches...
  14. T

    When will the LHC be ready to power up its first collision?

    This is a general question. When will the LHC be ready to power up its first collision?
  15. M

    LHC Magnet Test Failure: Latest Updates and Delay Information

    See: http://user.web.cern.ch/user/QuickLinks/Announcements/2007/LHCInnerTriplet.html" What's the latest news on the LHC? How bad is the damage? How long will the delay be?
  16. jal

    Fermilab Statement on LHC Magnet Test Failure

    Everyone might have time to polish their theory. http://www.fnal.gov/pub/today/20070329_page01.html Fermilab Statement on LHC Magnet Test Failure
  17. P

    Possible Dangers of the CERN LHC Experiment

    2000 odd Tonnes of Magnet has just been installed into the new CERN LHC complex. Not being a Quantum Physicist can one of you clever chaps tell me what would happen if "we ventured into realms long regarded as those of speculative science fiction -- multiple universes, parallel worlds...
  18. B

    The Higgs Boson mass prediction for LHC: string theory's prediction v.s preon theory

    Thanks Lubos, Dear Lubos, Does string theory offer a concrete prediction for the mass of the higgs boson? Thanks Dan PS would you mind if I cross-post your response at sci.physics or PF? dan | 10.01.06 - 5:58 pm | # Dear dan, string theorists - just like everyone else - are...
  19. B

    Should the Tevatron see the Higgs boson? What-if LHC does not observe it?

    Should the Tevatron see the Higgs boson? Given that it can collide at the TEV scale, shouldn't this be enough to see the HIGGS BOSON? What-if LHC does not observe the Higgs boson? Obviously this is bad for the standard model. Would this disconfirm string theory? Can the standard model...
  20. B

    How exactly will LHC detect superpartners?

    How exactly will LHC detect superpartners? Presumably they will have higher mass, are there other ways to detect them?
  21. D

    What Experiments Can We Expect with the LHC?

    Does anyone know what the LHC will be capable of when it's running at high speed? I haven't really been able to find what kind of experiments the physicists will be able to perform with the collider. Just wandering what the plan was for this baby, what we can expect to learn, etc.
  22. S

    Randall-Sundrum; Observable particles at LHC?

    The model that Lisa Randall and Raman Sundrum propose consists of two four dimensional (Minkowskian) branes, bounding a five dimensional bulk between them. In their initial model the branes are very close together; this is not a "large extra dimensions" model. The motivation of the model is...
  23. H

    Beyond Standard: what will the LHC find?

    What do you think will we discover with the LHC? And what will we learn from it? Reference: http://arxiv.org/abs/hep-ph/0602198" I.e. how realistic do you think is the discovery of extra-dimensions, black holes, supersymmetry, the one more probable than the other, and what if (!) they...
  24. G

    [String-schools] [theory-conf-contacts] LHC Inverse WorkshopAnnouncement

    Hi, something for the more pheno based people among us... Cheers, Gabi ---------------------------------------------- Dear Colleague, With the imminent start of the LHC in 2007 particle physics is on the threshold of its most exciting period in over three decades. The physics of the TeV...
  25. A

    Z production cross section at LHC

    Does anybody know where to get the expected cross section for Z at the LHC (pp at 14 TeV)? (it would be great if you could provide a reference).
  26. S

    Explore Dr. Paul Dixon's Theory on Fermilab LHC Creation of Supernova

    Gather round thinkers...:) I would like to know if anyone here is acquainted with Dr. Paul Dixon's theory and speculation on the accidental creation of a supernova by experimentation in particle accelerator's. This is a very deep subject that first came up in 1998. Dr. Dixon appears to be...
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