Electron-positron: plasma wakefield collider

[PB666]

The problem in collisions between protons is that they are composed of three quarks and the gluons that bind them together, this greatly complicates the analysis of the collisions. Yesterday in one of threads a statement was made that conservation laws were conserved up to TeV range. Well not exactly, only within a statistical range can all momentum be analyzed, some of the momentum in the collisions ends up in undetected particles, particles that need to be mathematically corrected for. Some of the collisions are glancing blows and the result particles end up in detectors far from the collision along the path of travel. What this means is that at these ranges they only verify if the observations are consistent, but small differences from the expectation could potentially go undetected.

This colliders offers a simpler type of collision, one fermion against its anti-particle. Since these are simpler particles the accounting is far simpler.

http://scitechdaily.com/plasma-wakefield-acceleration-a-step-toward-smaller-particle-colliders/

[K^2]

Why are you making all these threads for things you don't understand, then get offended when it's pointed out that you don't understand them?

Fine, I'll go through it once more. The conservation laws are tested far more precisely by indirect means. Every single computation on self-interaction includes innumerable delta functions for 4-momentum conservation at each vertex. These produce computations that are verified to up to 12 decimal places. Similarly, DIS events test these conservation laws at far higher energy ranges. While precision there isn't quite as high, all of them fall within predicted ranges.

Main advantage of wake field accelerators is in how simple a device can be that achieves high energy scales. We have plenty of facilities that specialize in fermion acceleration. I've done summer work at one, namely, Jefferson National Laboratory. If that's all you're interested in, there is plenty of data on fermion-fermion and fermion-nucleon collisions.

[KSK]

Uh, a proton is a fermion too and proton-antiproton collisions are pretty messy. Lepton collisions, e.g. electron-positron, are simpler to analyse though, assuming you can build a practical accelerator around them. A neutrino-neutrino collider would be challenging to build.

And with regard to conservation of momentum, any detected "differences from the expectation" would be extremely exciting - not because we'd broken conservation of momentum but because we'd (probably) found a new particle. The neutrino was originally postulated as a mechanism to conserve momentum in beta decay, and was only observed experimentally much later.

Edit: Modern particle detectors are also pretty darn good and the statistics for claiming any sort of discovery in particle physics are pretty darn rigorous. Any undetected differences from expectations would need to be small indeed.

Edited September 7, 2015 by KSK

[PB666]

Why are you making all these threads for things you don't understand, then get offended when it's pointed out that you don't understand them?

Fine, I'll go through it once more. The conservation laws are tested far more precisely by indirect means. Every single computation on self-interaction includes innumerable delta functions for 4-momentum conservation at each vertex. These produce computations that are verified to up to 12 decimal places. Similarly, DIS events test these conservation laws at far higher energy ranges. While precision there isn't quite as high, all of them fall within predicted ranges.

You're the one who is getting offended, I made no mention of the lower energy stuff. I made specific statement at the problem with higher energies, which I in particular stated. I also stated that they fall within the expected range, in complete consistency with what you said. So point out specifically where the difference is.

The only difference between me and you, is that when you rebuffed a poster, you failed to mention the stipulation that the precision is not quite as high, you could have also mentioned that this does not explain the difference in momentum that Cannae drives offer, because it is at very different energy scales. So I fixed the problem for you by mentioning it. Problem solved.

Not every thing I see wrong posted here I note in that thread, but If I see new research or new articles I might drag up a old post and post on the topic, I think its fair to give updated information on old subjects.

Main advantage of wake field accelerators is in how simple a device can be that achieves high energy scales. We have plenty of facilities that specialize in fermion acceleration. I've done summer work at one, namely, Jefferson National Laboratory. If that's all you're interested in, there is plenty of data on fermion-fermion and fermion-nucleon collisions.

Not only simple device but markedly lowering the types of particles that will be generated by the collision and at much higher energies.

If you want me to get offended explain to me why a Socket 775 Mobo with built in LAN on Windows 7 cannot communicate with a brand new Modem/Router and yet a Brand new Windows system (which I threw together from amazon bought parts between posting with you this morning) with no driver installation for the LAN card can immediately connect to the internet. Particularly, that I have had the same Win7 system on a Router and Modem combo for 7 years and it worked fine. And also I have a day in store of transferring every thing from my old machine to a new computer because some weirdness of communication. Not to mention reinstalling programs and I am going to have to install Office 2010 or later which means, after long and intentional delay I will have to migrate (a very cheap word to describe a very difficult topic) all my VBA aps to VB.Net (including things like changing the base values of all arrays to 0). There are offenses, and then there are offenses. The only good thing today is that the USB3.0 install of 10 on an SSD took about 5 minutes,and I am finally going to install linux and hopefully divorce myself from all this Windows forced cycling.

[Vanamonde]

Please don't make it personal, guys. Keep the discussion to the sciencey stuff in question.

[PB666]

Uh, a proton is a fermion

Lol, yep.

[K^2]

Uh, a proton is a fermion too

Blargh. Sorry. Substitute "Lepton" everywhere I wrote fermion in that post. It was late.

[PB666]

http://www.nature.com/news/cern-prepares-to-test-revolutionary-mini-accelerator-1.18519