Smashing Electrons: What Would Happen?

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Discussion Overview

The discussion revolves around the concept of colliding electrons, exploring the implications and results of such experiments compared to those involving protons, neutrons, and positrons. It touches on theoretical and experimental aspects of particle physics.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • One participant notes the lack of experiments specifically focused on colliding electrons, questioning the potential outcomes of such an experiment.
  • Another participant points out that electron-positron colliders exist, such as the LEP, which allow for cleaner particle physics experiments compared to proton-proton colliders, but highlight the limitation of lower collision energies.
  • A different participant asserts that while electron-electron collisions are theoretically possible, they do not yield the interesting results seen in electron-positron collisions, citing lower cross-sections and the need for higher energy levels.
  • It is mentioned that fixed-target electron experiments serve as a lower-energy alternative for studying electron-electron and electron-nucleus collisions.

Areas of Agreement / Disagreement

Participants express differing views on the feasibility and significance of electron-electron collisions compared to electron-positron collisions, indicating a lack of consensus on the topic.

Contextual Notes

There are limitations regarding the energy levels required for electron-electron collisions and the necessity of separate beam pipes for such experiments, which may affect the feasibility of conducting them.

Mai Mariarti
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I have heard of many experiments dealing with smashing protons or neutrons, but I've never heard of smashing electrons together!
What would be the result of such experiment?
 
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There are many electron-positron colliders. LEP was the largest one so far. You can do particle physics with it, in a much cleaner way than with proton-proton colliders as the colliding particles are elementary. The downside is the lower energy of the collisions.

There are no neutron colliders as you cannot accelerate neutrons in an accelerator. They can make secondary collisions, of course, if they are produced by other collisions.
 
Everyone knows the result of electron-positron collision. is electron-electron collision even possible?
 
Sure, but it does not give the interesting results electron-positron gives. All the cross-sections are much lower, the reactions need much higher energy and so on. You also need two separate beam pipes (or a linear accelerator).

Fixed-target electron experiments are some low-energetic version for electron-electron collision, together with some electron-nucleus collisions.
 

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