  UV/IR Mixing is an umbrella term for phenomena in which high and low energy
physics does not decouple as expected and may offer new perspectives on the
electroweak hierarchy problem, i.e. the apparent unnaturally large hierarchy
between the electroweak and the Planck scales. Based on how UV/IR mixing has
been employed in the Cohen-Kaplan-Nelson bound and advocated as a solution to
the cosmological constant problem, we argue that in the Higgs system causal
diamonds replace the cosmic horizon as an infrared bound for effective field
theory and show how this ansatz may help to explain the large hierarchy between
the electroweak and the Planck scale.
