Physics dilemma. I posted this in one of the threads. But nevertheless:
On a sub-atomic level every single particle has an anti-particle. If the two come together and collide with enough energy, they annihilate each other and give out energy in the form of gamma rays. If that is the case, I sometimes wonder of the existence of anti-particles that make up an "anti-me" in a parallel universe. And if such an "anti-me" exists, I wonder if annihilation would occur if we collide with sufficient energy. I would exist as energy . I mean it is possible, if it exists, because energy and mass are equivalent. And all matter has mass. Hmmm.
Physics dilemma. I posted this in one of the threads. But nevertheless:
On a sub-atomic level every single particle has an anti-particle. If the two come together and collide with enough energy, they annihilate each other and give out energy in the form of gamma rays. If that is the case, I sometimes wonder of the existence of anti-particles that make up an "anti-me" in a parallel universe. And if such an "anti-me" exists, I wonder if annihilation would occur if we collide with sufficient energy. I would exist as energy . I mean it is possible, if it exists, because energy and mass are equivalent. And all matter has mass. Hmmm.
'You' would become energy, but 'you' would no longer exist (well i dont believe in a soul)
Photons, gravitons and Z0 particles don't have anti-particles. Particles and anti-particles don't have to have sufficent energy to annihilate, they will destroy one another if they meet at any energy.
Well I think it depends on your particular convention. The particles I listed have antiparticles, themselves, so does that mean they actually have antiparticles? After all, there is a sea of gravitons and photons around us right now, so they can interact.
If two photons collide and emit two photons, did they annihilate one another (like an electron/positron collision would) or did they just interact and go their seperate ways? Depends on how you want to think about it, you'll get the same answer either way.
QED does predict that gamma-gamma collisions can initiate pair production (create matter/antimatter pairs). The team working on the LHC at CERN is thinking about possible ways to modify some experiments to look for evidence of such interactions. The problem the cross section for such reactions is incredibly small, even compared to the cross sections for lepton or baryon collisions.
emm... my physics is rather weak but when they collide different photons are formed so they annihilated each other?
The thing is, can you definitely tell me they have annihiliated and then produced two entirely new photons, or have they just interacted, altering some of their characteristics? Given these characteristics are all you can know about photons, it doesn't matter which mechanism you think is true, the outcome is the same