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In the context of quantum field theory, why is it impossible for two photons (or other massless bosons like gluons) to collide and produce a single photon? This kind of a process is supposed to be ...
#2: Post edited
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Technically Natural
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2023-06-07T12:40:48Z (over 1 year ago)
#1: Initial revision
by
Technically Natural
·
2023-06-07T12:38:25Z (over 1 year ago)
Why is it forbidden for two photons to turn into one?
In the context of quantum field theory, why is it impossible for two photons (or other massless bosons like gluons) to collide and produce a single photon? This kind of a process is supposed to be forbidden by momentum conservation, but it was not immediately obvious to me why this is.