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### Quantising the energy-momentum relation

The energy-momentum relation in special relativity states $m^2 = E^2 - ||p||^2$ (in natural units). So $$E = \pm\sqrt{\| p \|^2 + m^2}.$$ If we want to find a theory for a relativistic free ...
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### Locality of interactions and their high energy behavior

In a classic Georgi review of EFT, I have read the following quote The result of eliminating heavy particles is inevitably a nonrenormalizable theory, in which the nontrivial effects of the heavy ...
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