Can you create antimatter by letting photons collide?
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See Two-photon physics. – NickD Jul 26 '17 at 20:39
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Related: https://physics.stackexchange.com/questions/274322/how-does-gamma-gamma-pair-production-really-work and https://physics.stackexchange.com/questions/182656/is-pair-production-only-with-gamma-photons – auden Jul 26 '17 at 20:40
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Yes.
Photon-photon pair production can be represented by the equation $\gamma + \gamma^{'}\rightarrow e^-+e^+$, which basically means that the collision of two photons produces an electron and a positron (the anti-electron).
auden
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In the case, two photons get converted into a pair of particles, would this this be in any case a particle and its antiparticle? Could be produced two neutrons? – HolgerFiedler Jul 27 '17 at 04:08
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@HolgerFiedler I'd suggest you'd read about pair production, especially gamma-gamma pair production - that'll help answer your questions =) – auden Jul 27 '17 at 15:04