What happens when a particle and an anti particle collide

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SUMMARY

When a particle collides with its corresponding antiparticle, they annihilate, converting their mass into energy according to E = mc². This energy can create new particles, including photons and other particle-antiparticle pairs, depending on the collision's energy level. Low-energy collisions, such as those between electrons and positrons, primarily produce photons, while high-energy collisions can yield a variety of particles, including mesons and baryons. The annihilation process illustrates the fundamental relationship between mass and energy, demonstrating that energy can warp spacetime similarly to mass.

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  • Understanding of E = mc² and its implications
  • Familiarity with particle physics concepts, including particles and antiparticles
  • Knowledge of electromagnetic, weak, and strong interactions
  • Basic grasp of quantum mechanics and particle creation
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  • Research the mechanisms of particle-antiparticle annihilation
  • Study the properties and interactions of mesons and baryons
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  • #31
Um - as interesting as working out how many atoms there are in etc etc isn't it a bit off topic? I intended my statement to be an absurd understatement :) Even attempting to manufacture, without bothering to contain, the mere 1g that was my example would be silly.
 
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  • #32
mfb said:
Volume is not a meaningful quantity here - most of the matter is very thin interstellar plasma of variable density, and the remaining part is mainly plasma in stars. Just a small fraction is solid.

How to estimate the matter density? Mainly: observe it. The total amount of matter is then given by a multiplication with the size of the observable universe.

That's precisely the point I was trying to make.
 

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