Scale-invariant instantons and the complete lifetime of the standard model

@article{Andreassen2018ScaleinvariantIA,
  title={Scale-invariant instantons and the complete lifetime of the standard model},
  author={Anders Johan Andreassen and William Frost and Matthew D. Schwartz},
  journal={Physical Review D},
  year={2018},
  volume={97},
  pages={056006}
}
In a classically scale-invariant quantum field theory, tunneling rates are infrared divergent due to the existence of instantons of any size. While one expects such divergences to be resolved by quantum effects, it has been unclear how higher-loop corrections can resolve a problem appearing already at one loop. With a careful power counting, we uncover a series of loop contributions that dominate over the one-loop result and sum all the necessary terms. We also clarify previously incomplete… 
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