Superluminality and UV completion

  title={Superluminality and UV completion},
  author={G. Shore},
  journal={Nuclear Physics},
  • G. Shore
  • Published 2007
  • Physics
  • Nuclear Physics
Abstract The idea that the existence of a consistent UV completion satisfying the fundamental axioms of local quantum field theory or string theory may impose positivity constraints on the couplings of the leading irrelevant operators in a low-energy effective field theory is critically discussed. Violation of these constraints implies superluminal propagation, in the sense that the low-frequency limit of the phase velocity v ph ( 0 ) exceeds c . It is explained why causality is related not to… Expand

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