On renormalization group flows in four dimensions

  title={On renormalization group flows in four dimensions},
  author={Z. Komargodski and Adam Schwimmer},
  journal={Journal of High Energy Physics},
A bstractWe discuss some general aspects of renormalization group flows in four dimensions. Every such flow can be reinterpreted in terms of a spontaneously broken conformal symmetry. We analyze in detail the consequences of trace anomalies for the effective action of the Nambu-Goldstone boson of broken conformal symmetry. While the c-anomaly is algebraically trivial, the a-anomaly is “non-Abelian”, and leads to a positive-definite universal contribution to the S-matrix element of 2 → 2 dilaton… Expand
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