Me (in yet a different context, jokingly): [quotes the two people above] So, virtual photons don’t exist, and real photons don’t exist. Therefore, no photons exist at all.
This is less joking then you think- its more or less correct. If you change the final to conclusion to “there isn’t a good definition of photon” you’d be there. Its worse for QCD, where the theory has an SU(3) symmetry you pretty much have to sever in order to treat the theory perturbatively.
This is less joking then you think- its more or less correct. If you change the final to conclusion to “there isn’t a good definition of photon” you’d be there. Its worse for QCD, where the theory has an SU(3) symmetry you pretty much have to sever in order to treat the theory perturbatively.