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UV/IR Mixing, Causal Diamonds and the Electroweak Hierarchy Problem

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UV/IR Mixing has been proposed as a possible explanation of the hierarchy problem, i.e. the apparent unnaturally large hierarchy between the electroweak and the Planck scales. Here we suggest that UV/IR mixing may not be a new, exotic phenomenon but rather a generic feature of entangled systems in quantum mechanics. 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 IR bound for effective field theory and show how this ansatz may help to explain the large hierarchy between the electroweak and the Planck scale.

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