Lhc Definition and 320 Threads

Hi all, I wonder if I study new Higgs scalars, How the data of the LHC for searching for heavier scalars in h-> WW->lvlv and h -> ZZ-> 4 l channels like in [arXiv:1304.0213] can make constrain on my study for the new Higgs? How a figure like figure 2 can give constrains on my model free...

Hi all, I wonder if I study new Higgs scalars, How the data of the LHC for searching for heavier scalars in h-> WW->lvlv and h -> ZZ-> 4 l channels like in [arXiv:1304.0213] can make constrain on my study for the new Higgs? How a figure like figure 2 can give me data for my model...

Considering that speed of light is constant and finite, then why are the time dilatation and length contraction infinite to a frame of reference moving at the speed of light? We know that a moving frame of reference experiments time dilatation and length contraction from the point of view of a...

Hi guys, I started to write articles in science, especially high energy physics and LHC news, I made a facebook page but still my friends only see it, so have you any suggestions about any journals or websites accept articles from beginners .. Also any suggestions for me to make this...

I had an argument at my university about it, since experiments at LHC aren't 100% confirmed. I mean, gauge theories are.. theories and Goldstone bosons are theorems. Someone share some light plese?

When a proton collides with a proton say at the LHC, is vacuum field theory used? It seems like you shouldn't have to include temperature effects since there are only two particles. But then again, all experiments take place at finite temperature, the ambient temperature of the room? When a...

My question is essentially a variation of the Ehrenfest paradox in SR. But hopefully with some experimental data. In the LHC, for example, a fixed number of particle bunches with some length are injected into the main ring. Now, as the velocity of the particles increases, the bunches would be...

Here is an idea I had for a way to deduce the internal structure of an organic object using it's natural radioactivity. The set-up is an array of gamma ray detectors located circularly around the object. By detecting both the position and direction of the gamma rays (obviously impossible to get...

I have this crazy and goofy dream to construct an artificial black hole. Not a crude analogue, but the actual astronomical object. Would that entail using a particle accelerator to accelerate particles to huge velocities, gaining mass, and then smashing together and then turning into a black...

Hi everyone, So I've been wondering how much energy does it takes to impart some kind of effect on the higgs field. I've been trying to look for the energy the LHC generates and compare it to the actual amount of energy that it takes for the higgs field to be affected, but since this is all new...

i mean, people are creating LHC to split the atoms, but why don't we just spin it? spin in in high speed and see if a quark/photon/electron would break can we not do that? is it mathematically impossible to have a mass in the center of rotation?

Hi all, Have anyone idea about the recent Higgs searches at the LHC ? I mean after finding the SM Higgs , is there now any trials to find another Higgs ? or just now they are confirming and rechecking data, for example if the newly discovered Higgs is the SM one or " SM- like Higgs"...

Hi all, In 2011 CDF experiment at Tevatron announced that they had reported W+2jets signal excess for 2 jets mass range around Mjj ~ 150 GeV but D0 experiment didn't see this signal anomaly using the same criteria. So have anyone an idea or recent reference how this discrepancy had...

https://www.sciencenews.org/blog/context/it%E2%80%99s-too-soon-declare-supersymmetry-tragedy I have just been reading this and it seems to me another layer of complexion is needed to keep the theory alive. http://arxiv.org/ftp/arxiv/papers/1308/1308.4768.pdf Abstract The first three...

Hello to all. I have a pretty general question. Hopefully it will require a somewhat technical answer. My question is this. Has there been any experiment where quarks have been smashed together? Perhaps at the lHC or Fermi. The other day I was told about such an experiment where two quarks were...

I wanted to ask wheter there is any progress when it comes to SUSY. Since LHC didn't find any superpartners and LUX found no neutralinos how much space does SUSY have left? I mean it can be fine tuned but that can't be done forever right? Or is there something I don't know that improves...

Hi, I have been reading about CERN for a while and found amazing - amongst many other things - the fact that hadrons in the LHC turn some of their energy to mass after having reached the maximum possible speed. However this statement was not clear enough. I was wondering whether the mass they...

I tried searching through but didn't find this asked. If the spin of the particle detected at LHC comes back as 2, for instance, does it mean it's not a higgs boson? There are 5 higgs in supersymmetry, do they all have spin 0?

Biggest problem which LHC is worried about is knowing how mass is related to particles.does this mean that physical significance or understanding about charge is discovered.? If yes,what charge is.? If No,why scientists are not concerned to know about what fundamental charge is by conducting...

Have we ever observed microscopic black holes in the LHC?

What the title says...

Just watching the live feed from the LHC and as if the black hole it was meant to create was speaking to us, it broke on queue. Seriously..is this thing not the biggest piece of junk ever invented? Obviously it is complicated beyond the scope of this forum..but with scientists studying it for...

I know they are going to be doing experiments where they send two 7 TeV beams in opposite directions and observe collisions but do they send two beams, one 7 TeV and one 3.5 TeV, in the same direction and observe collisions? How would these results differ? We should see relativistic effects...

What is the highest possible energy per beam that the LHC can handle?

http://www.math.columbia.edu/~woit/wordpress/?p=2819 ==quote== High Energy Beams at the LHC At 5:23 am in Geneva this morning, for the first time the two LHC beams were ramped up to high energy, the 3.5 TeV/beam that they plan to run at for the next two years. These are the highest energy (per...

when is the LHC find out if higgs boson excist?

http://www.springerlink.com/content/t35h6211438476k0/fulltext.pdf http://www.physorg.com/news185649606.html

sqrt(1-v2/c2) About matter and mass... I've been thinking that if the Lorentz-Fitzgerald contraction equation can accurately calculate an increase in inertial mass (without anything representing the Higgs Field), is there any need for the Higgs Boson? Doesn't the LF equation imply that...

Zeptospace Odyssey---looks like the first witty LHC book Amazon let's you browse an ample sample of this new hip HEP book. It's a fun book about fundamental physics with characters and anecdotes going back to Bohr and brought up to the Large Hadron minute. Gian Francesco Giudice is a CERN...

If I were to make it to Switzerland on my own (maybe as part of a business trip, followed by a few days off ...) would it be possible to tour the collider?

I'm not fully able to comprehend the argument that allegedly proves, that no mini b/h can emerge at CERN - that we witness collions at higher energies everyday and no b/h has occurred so far - besides the prediction that such objects would immediately decay and disintegrate because of...

Alpine Kat has a new rap video. Her first one "LHC Rap" was a great success, so you might want to view the sequel, called "Black Hole Rap". Here is "LHC Rap" As you may recall, the first voice you hear on this one sounds like Stephen Hawking. Could well be. I think he is in the credits.

The following link gives the press release. http://press.web.cern.ch/press/lhc-first-physics/ Are there links to the papers that will be published? Will they come from different centers or from CERN? Will Physic forums use one thread to gather that info? jal

http://www.uslhc.us/The_US_and_the_LHC/Collaborating_Institutions/Institutions_by_Project#alice" A comprehensive list of all US Universities participating in the LHC Project, institutions marked with a blue arrow (47 total) have contributed to design/installation of hardware and software to...

Hi, I was wondering: why is the LHC a proton-proton collider and not a proton-antiproton collider? Has it a theoretical reasons or is it just for practical reasons? Thanks, Ward

Hello all. First time posting here. I have a basic understanding of special relativity and I have few questions about what the Large Hadron Collider (LHC) looks like to a proton going around inside it. As I thought more and more about it the few questions turned into a bunch of questions...

Does anyone know what the probability of creating a strangelet in the LHC would be? Do all applications of QM predict the possibility of a strangelet? Is a strangelet a strong prediction in the (SM) or kind of like a wormhole(this might be a bad example for some) - a sort of fuzzy prediction...

What is a realistic timeline for the LHC initial experiments? ie. with a machine this massive and complicated, how long does it take experimenters to get to know the detector and backgrounds (I've heard many a theorist complain about how the experimentalists still don't use next-to-leading-order...

Woit's blog just reported "A few minutes ago, one of the beams of the LHC was ramped up to an energy of 1180 GeV, besting the Tevatron’s top beam energy of 980 GeV. Update: Actually the beam was lost at 1070 GeV, which is still a record high energy."...

I was subscribed to the cern podcast but they only have 12 episodes. Anyone know of any other podsCASTS on the LHC that have updates weekly?

Hi all, Just a lay person here with a healthy interest and a quick question:- In a particle accelerator, as the particle 'beams' are accelerated, can it be said that the particle occupies more length along it's path as it's velocity increases. Is it possible that a particle could 'stretch'...

http://cmsdoc.cern.ch/cms/performance/FirstBeam/pictures221109/CollisionEvent.png Garrett Lisi has mirrored the official site, in case of any problems with accessibility. http://sifter.org/~aglisi/albums/LHCfirstcollisions.png

Beyond LHC: NewScientist: by Jessica Griggs http://www.newscientist.com/article/mg20427354.900-future-colliders-beyond-the-lhc.html" Possible Particle Detection categories: Higgs ? Complex Higgs ? Evidence of Supersymmetry ? Gravitons ? Particles associated with String Theory ? New...

Last night the LHC re-established circulating beams. CERN has issued a http://press.web.cern.ch/press/PressReleases/Releases2009/PR16.09E.html" .

I have setup a very cool LIVE portal to the LHC and CERN... I have have a brand new forum just for the LHC.. http://www.lhcportal.com/

Hello there, I've been here before to ask for help with my fears about the LHC a while ago. Suffice to say I eventually overcame them thanks to the help from some members of this forum and that of Michaelangelo Mangano of CERN. However recently I've decided to revisit the old LHC Defense forums...

Why S Hawking predict BH formation in LHC ?

Excellent talk at clear basic level. To save time, one can start at minute 7:00. That's where he discusses the standard model and then the Higgs, and then moves on to what else might be found. http://www.ustream.tv/recorded/2384517 I gather the talk was given this morning, 19 October, at a...

at design energies 14TEV collisions?

An American physicist is investigating the possibilities of the development of a hyperdrive at the LHC. If you're not familiar with the story, here it is. http://www.physorg.com/news174293159.html What do you guys think? Do you think it's ******** or is there something to it?