http://arxiv.org/abs/2107.02801
If the strange quark were lighter, QCD phase transition could have been first order. Is this near-criticality just a coincidence? We show that this can explain the weak scale criticality through cosmological selection. We first explore quantum critical points of $N_f=3$ QCD, parameterized by the Higgs vev $v_h$ at $T=0$, and show that they can be attractors for the quantum-dominated evolution of $v_h$ during eternal inflation — Hubble selection. This results in the sharply localized weak scale which is critical, not to the cross-over at zero, but to the quantum transition at ${\sim}\Lambda_{\rm QCD}$. It presents a wishful account of scale hierarchies, using quantum cosmology and near-criticality of SM.
S. Jung and T. Kim
Thu, 8 Jul 21
51/52
Comments: 10 pages, 5 figures
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