论文标题
具有实验可区分的电动对称性破坏的起源
Experimentally distinguishable origin for electroweak symmetry breaking
论文作者
论文摘要
我们考虑了标准型号（SM）的经典保形$ u（1）$量规扩展，其中$ u（1）$量规对称性被Coleman-Weinberg机制辐射。这种打破触发了电动（ew）对称性的对称性，突破了$ u（1）$ higgs字段和sm higgs doublet之间的混合四分之一耦合。在对称破裂之后的两个希格斯玻色子大量特征，$ h_1 $（smike smike higgs boson）和$ h_2 $（sm singlet singletike like higgs boson），我们计算了higgs boson boson boson trininear trinear coupling（$ g_ g_ vy（$ g_ vy）$ g_ {$ g_ {1} $ {1}希格斯玻色子质量谱为$ m_ {h_1}> 2 m_ {h_2} $。对于一个常见的希格斯质谱和两个希格斯田之间的混合角，我们发现$ g_ {h_ {1} h_ {2} h_ {2} h_ {2} h_ {2}} $在经典的模型中受到了高度抑制，与在常规的higgs潜力中相比，$ u（1）$ u（1）损失的质量是$ u（1）的质量，而在$ u（1）的质量中，ew square squarders squarders square square square square square square square square square squarders square square squarders square square则是偏见的质量。树一级。因此，这种耦合抑制是EW对称性破坏的辐射起源的惊人性质。然后，我们考虑如何通过精确测量异常的SM Higgs Boson耦合以及搜索异常的SM Higgs Boson Decay $ H_1 \ rightArrow H_2 H_2 H_2 $，然后以$ H_2 \ $ H_2 \ th $ H_2 \ bar {B \ bar {B \ bar {我们得出的结论是，一旦在ILC上测量了异常耦合，在常规的希格斯潜力中，对异常的希格斯玻色子衰变的观察是有望的，而这种衰减过程则被高度抑制且无法检测到通常的同伴模型。
We consider a classically conformal $U(1)$ gauge extension of the Standard Model (SM), in which the $U(1)$ gauge symmetry is radiatively broken by the Coleman-Weinberg mechanism. This breaking triggers the electroweak (EW) symmetry breaking through a mixed quartic coupling between the $U(1)$ Higgs field and the SM Higgs doublet. For two Higgs boson mass eigenstates after the symmetry breaking, $h_1$ (SM-like Higgs boson) and $h_2$ (SM singlet-like Higgs boson), we calculate the Higgs boson trilinear coupling ($g_{h_{1} h_{2} h_{2}}$) in the model by setting the Higgs boson mass spectrum to be $M_{h_1} > 2 M_{h_2}$. For a common Higgs mass spectrum and mixing angle between two Higgs fields, we find that $g_{h_{1} h_{2} h_{2}}$ in the classically conformal model is highly suppressed compared to that calculated for the conventional Higgs potential, where the $U(1)$ and EW symmetry breaking originate from the negative squared masses for the Higgs fields at the tree-level. Thus, this coupling suppression is a striking nature of the radiative origin of EW symmetry breaking. We then consider how to distinguish this origin at the proposed International Linear Collider (ILC) via precise measurements of anomalous SM Higgs boson couplings and the search for anomalous SM Higgs boson decay $h_1 \rightarrow h_2 h_2$ followed by $h_2 \to b \bar{b}$. We conclude that once the anomalous couplings are measured at the ILC, the observation of the anomalous Higgs boson decay is promising in the conventional Higgs potential, while this decay process is highly suppressed and undetectable for the classically conformal model.
