Collider Definition and 67 Threads

The team has found that the particle, known as a W boson, is more massive than the theories predicted. The result has been described as "shocking" by Prof David Tobak, who is the project co-spokesperson. The discovery could lead to the development of a new, more complete theory of how the...

Sphaleron interactions are the only interactions in the Standard Model of Particle Physics that violate the separate conservation of baryon number and lepton number at very high energies, although they still conserve baryon number minus lepton number (B-L). Even at the LHC we haven't actually...

Hello everybody! I have a question regarding the measure of the asymmetry left-right (##A_{LR}##) at the SLC. Since the beam was not fully polarized the measured asymmetry is different from the theoretical one. The relation which I have found on papers and books is: $$A_{LR}^{measured} =...

Quoting the Royal Institution YouTube channel: The link to the video: Time is 7pm GMT.

What could change if a collider like LHC would be built and made function in Earth's orbit or on another planet like Mars?

Hi there, While reviewing the theory of Feynman diagrams for QED, a question came into my mind. In the textbooks, one usually deals with processes involving two incoming particles. But I could imagine a process where four particles are interacting (e.g. attached picture) and this can give a...

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...

Hi, I was asking how fast is the fastest Hadron ever moved in the large Hadron collider.And most importantly how do they calculate it? Do the calculate it mathematically or with a detector?

Is there a programmable telescope that will point to any spot on Earth from my location that I could simply plug in the latitude and longitude and it would point at the location anywhere on Earth. For instance, if I wanted it to point at the LHC (Large Hadron Collider), could I just plug in the...

Just out of curiosity I was wondering what would happen if a Bose-Einstein condensate were placed in a Hadron Collider. Is it even possible?

Or, is that that the hadrons are large? Or, are they both large? What exactly is the adjective "large" qualifying please? I do know that the tunnel is very large indeed, and that this is the most sophisticated machine ever built.

I read the following interesting article about the Great Collider in China. Could the $10 Billion Great Collider become reality as the main adviser Arkani-Hamed main purpose of it is to find Naturalness? It's like him telling China "LHC didn't find naturalness, could you construct the $10...

I'm looking to figure out how fast ions are traveling in the fusor I have access to. The chamber is roughly 12-14" long, with a central electrode charged to 75 kV and 5 mA. Is the type of ion relevant? What would I have to do to figure out how fast the ions are moving?

It's to my understanding that the Large Hadron Collider is so 'large' due to the fact E=MC^2 and that when the accelerated particles approach the speed of light their mass increases logarithmic to a near infinite mass, meaning the magnetic force applied to the particle, to stop it from touching...

Homework Statement Two equal energy photons collide head on and annihilate each other, producing a u+, u- pair. The two particles have equal mass, about 207 times the electron mass. A) Calculate the maximum wavelength of the photons for this to occur. B) If the wavelength calculated in A) is...

Large Hadron Collider is restarting ... wonder what will be discovered ... particles somehow related to dark matter ... and other wonders ... Cern restarts Large Hadron Collider with mission to make scientific history | Science | The Guardian Peter

Homework Statement A collider has an average electron current of 10 milliAmps and an average positron current of 5 milliAmps.If the ring radius is 100 m and there is one electron bunch and one positron bunch with uniform density, radius 1 µ and length 2 mm, what is the average luminosity in...

If we assume that Dark Matter consists (or their fraction) of new particles, WIMPs. Why they aren't detected in colliders? I am beginner in a field of DM. Would you recommend some literature? Thank you all.

If one was to entangle two particles and either send the two particles at each other, or send one of the entangled particles and observe the other; what do you think might happen? If there are any problems with getting an entangled particle into the Hadron Collider, please say so.

What would happen if I was standing in the LHC and I was hit by a (one) proton traveling at 99.999991% the speed of light. Would the collision burn a hole in me? or would it simply be going so fast that it passes through me without interacting with the particles in my body?

Hi guys, I have the idea of putting together a model collider that fires two smashable objects (eggs or whatever) at each other and show a high speed camera footage of the objects hitting each other - this is all as an analogy of what the hadron collider does at CERN. Any ideas what I...

How do particle colliders read the trajectories of particles in the collider? Are EM waves emitted from each of the particles? If some particles do not emit EM waves, does the "sensor" only read particles that emit EM waves? ...In other words, what bridges the gap between our pictorial data and...

I was on the LHC simulator and the collisions of the Hydrogen atoms were confusing. Why were some uniform in direction while some spinning erratically in a cork screw pattern? Does that behavior have anything to do with the positive or negative charges of the Quarks in the nucleus?

Hi Folks. Given the current speculation for the proposed locale for the International Linear Collider where in your opinion should it be sited?

so according to wiki: protons have a Lorentz factor of about 7,500 and move at about 0.999999991 c, or about 3 metres per second slower than the speed of light (c) If we consider speed of Earth's rotation or speed at which two galaxies approach each other (collision or otherwise)?

Presumably a collider has some sort of pinhole out of which particles get ejected in a particular direction, and the energy (momentum) with which they are ejected is supposedly known. So, the operators/designs of the instrument know both the position (at the ejection pinhole, or whatever) and...

Does it just burst into vast amounts of energy? Or what about colliding two electrons together. higgs boson?

According to Wikipedia, the source of all knowledge, the LHC contains some 1,232 dipole magnets with an additional 392 quadrupole magnets. What is the difference in function between the two types of magnets? How might the effects of magnetic field gradients contribute to the differences...

Hello, I stumbled across the following equation in a presentation about collider physics: tcorrWV =(tiRV - tiWV) + (TOFRV - TOFWV), where tcorrWV is the corrected time for the wrong vertex, tiRV is the initial time of the right vertex, tiRV is the initial time of the wrong vertex...

New boson sparks call for 'Higgs factory' - physicsworld.com That article mentions a possible muon collider for making Higgs particles. Muons have the nice feature of having much less synchrotron-radiation loss, permitting a much smaller accelerator. However, muons have a problem. Their...

When two particle beams meet head on, more energy is available than when the particle beam is directed at a fixed target. Why is this??

Every paper I read about cross-section measurements from colliders has a line saying (for example): ...positron-electron annihilations at \sqrt{s} = 40 GeV are studied... 1) What does this mean? I'm guessing it means that in the CM frame, the energy of each beam is 40 GeV. 2) Why use...

Hi just a quick question, why do they choose to collide the ions at just under the speed of light? what would happen if they were shot at the speed of light or higher?

I was wondering, if there was a hint or a strong signal of a Higgs particle existing around the 125 GeV region whether the possible future International Linear Collider would be able to probe that energy and produce Higgs to study? Also, if this is true, is it also true that the linear collider...

One of the aims of the Large Hadron Collider is that it may be able to re-create conditions in the early universe and therefore produce the quark-gluon plasma that appeared microseconds after the universe's birth. However a fundamental difference between the universe now (in which the...

Random question. Would shining a laser at a collision between particles let you observe anything you wouldn't be able to otherwise? For example, would any of the created particles absorb or reflect this light enough to be observable before decay? I'm assuming that it would be, at best, of...

Q.) what substance is used for the hadron collider, the metal? I presume a metal compound of some sort but was wondering which and would it have to withstand high temperatures or are the electromagnets used kept at low temperatures due to better effieciency?

Can anyone explain a bit how does the LHC uses magnetic filed to accelerate protons? And why does it use protons for the collision? Couldn't they have used electrons?

What are your thoughts? Apologies if this is in the wrong place... http://www.popsci.com/science/article/2010-02/rhic-collider-creates-72-trillion-degrees-fahrenheit-quark-gluon-plasma"

The canceled Superconducting Super Collider had 3x beam energy of 40TEV vs LHC 14TEV. While it has been cancelled, could it be re-started 20-30 years after LHC hits diminishing returns in the future? Is there any new expected physics in SSC range over and above LHC that would make it worth...

Homework Statement Using the actual charge of an electron and the mass of an electron, determine the velocity of an electron that has been accelerated across a potential difference of 100000 volts. (Hint: T.) Homework Equations unsure of the formula. idk where to find it The...

By what factor would the radius parallel to the direction of travel contract for a 7 TeV proton, relative to an antiparallel 7 TeV proton, in the Large Hadron Collider?

When protons collide in ATLAS, it shows some of the particles in close proximity to the collision with a curved trajectory. The cool thing is, some curve away from the ground. I’m trying to understand what influences this trajectory. If anyone can give me some info to help that would be great...

Ok, apologies if my understanding is limited or even wrong but I know I'll learn something from your replies even if my question turns out to be idiotic! Relativity gives us length contraction as we approach the speed of light but quantum mechanics gives us uncertainty as to a particles...

Hello, I have some basic questions that perhaps someone within the proper field might answer. I was wondering if there has been any significant preemptive analysis or models of the potential impacts of cintrifical force generation during and after the operation of the hydron collider in...

Homework Statement If its circumference is 27km, and there are 4 equally spaced points where the beams collide, show a collision takes place every 22 microseconds at each one of the collision points Homework Equations I don't know where to start, which equation should I use? The...

1) Why do the electrodes in a linear accelerator get progressively longer? 2) What is a synchrotron? what is it used for? 3) How does a Geiger-Muller (GM) tube work? 4) How are particles detected in a hadron collider?

I watched some interesting videos on the Large Hadron Collider (LHC) and it raised a whole ton of questions. If my questions do not make any sense, perhaps the video itself, though clever and catchy, is not credible. ( http://technology.todaysbigthing.com/2008/09/11 +...

Hi guys, I'm new to the forums! Just recently, I became very interested in the SSC. After looking at some of the plans and details, I couldn't help but wonder why the project has not been reopened... I was thinking of possibly either: 1) Getting a nation wide petition signed to reopen...

http://www.youtube.com/watch?v=qQNpucos9wc&feature=rec-HM-r2