Uses and abuses of effective Lagrangians.

  title={Uses and abuses of effective Lagrangians.},
  author={Burgess and K London},
  journal={Physical review. D, Particles and fields},
  volume={48 9},
  • Burgess, K London
  • Published 1993 in Physical review. D, Particles and fields
Motivated by past and recent analyses we critically reexamine the use of effective la-grangians in the literature to constrain new physics and to determine the 'physics reach' of future experiments. We demonstrate that many calculations, such as those involving anomalous trilinear gauge-boson couplings, either considerably overestimate loop-induced effects, or give ambiguous answers. The source of these problems is the use of cutoffs to evaluate the size of such operators in loop diagrams. In… CONTINUE READING

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