Model-independent Veltman condition,naturalness and the little hierarchy problem  

作　　者：Fayez Abu-Ajamieh 

机构地区：[1]LUPM UMR5299,Universitéde Montpellier,34095 Montpellier,France

出　　处：《Chinese Physics C》2022年第1期31-42,共12页中国物理C（英文版）

基　　金：Support by the OCEVU Labex(ANR-11-LABX-0060);the A*MIDEX project(ANR-11-IDEX-0001-02)funded by the"Investissements d'Avenir"French government program managed by the ANR。

摘　　要：We adopt a bottom-up Effective Field Theory(EFT)approach to derive a model-independent Veltman condition to cancel out the quadratic divergences in the Higgs mass.We show using the equivalence theorem that all the deviations in the Higgs couplings to the W and Z from the SM predictions should vanish.We argue based on tree-level unitarity that any new physics that naturally cancels out the quadratic divergences should be ≤19 TeV.We show that the level of fine-tuning required is unless the O(0:1%-1%) UV sector has a symmetry that forces the satisfaction of the model-independent Veltman condition,in which case all fine-tuning is eliminated.We also conjecture that,if no new physics that couples to the Higgs is observed up to~19 TeV,or if the Higgs couplings to the SM particles conform to the SM predictions,then the Higgs either does not couple to any UV sector or is fine-tuned.

关 键 词：effective field theory HIGGS little hierarchy problem quadratic divergence fine-tuning UNITARITY byeond the standard model 

分 类 号：O572.214[理学—粒子物理与原子核物理]