AI 中文总结
本研究探讨10 GeV能区类轴子粒子$A_h$的存在可能，分析希格斯玻色子衰变的两种信号道，发现其可解释CMS实验的3.5σ双光子超出，且4胶子衰变会形成带2-prong子结构的125 GeV宽喷注重现。
AI 中文摘要
如果类轴子粒子（ALPs）存在，它们可能仅与希格斯玻色子（$h^0$）或超出标准模型的场存在可重整化耦合。质量轻于约60 GeV的ALP $A_h$ 可发生 $h^0 \to A_h A_h$ 衰变，其分支比由导致 $A_h$ 质量（$M_A$）主要贡献的显式整体对称性破缺决定。携带色荷与电荷的新重场（如超对称夸克squarks）可通过单圈介导 $A_h$ 衰变，主要衰变为胶子，也可衰变为光子。探究大型强子对撞机（LHC）对 $A_h$ 的灵敏度时，我们发现 $h^0 \to A_h A_h \to (gg)(γγ)$ 道会产生质量为 $M_A$ 的双光子共振，其产生率与CMS合作组在 $M_A \thickapprox 13.6$ GeV 处报道的3.5σ超出结果一致。对于约10 GeV的 $M_A$，$h^0 \to A_h A_h \to 4g$ 级联衰变会产生两个宽喷注（每个均含2-prong子结构），二者形成质量为125 GeV的共振。
英文摘要
If axion-like particles (ALPs) exist, they may have renormalizable couplings only to the Higgs boson ($h^0$) or to fields beyond the Standard Model. An ALP $A_h$ lighter than about 60 GeV would allow the $h^0 \to A_h A_h$ decay, with a branching fraction determined by the explicit global symmetry breaking responsible for the main contributions to the $A_h$ mass ($M_A$). New heavy fields that carry color and electric charge, such as squarks, can mediate $A_h$ decays at one loop mostly into gluons, but also into photons. Exploring LHC sensitivity to $A_h$, we show that the $h^0 \to A_h A_h \to (gg)(γγ)$ channel leads to a diphoton resonance at $M_A$ whose production rate is consistent with a $3.5σ$ excess reported by a CMS search at $M_A \approx 13.6$ GeV. For $M_A$ of order 10 GeV, the $h^0 \to A_h A_h \to 4g$ cascade decay leads to two wide jets (each with 2-prong substructure) that form a resonance at 125 GeV.
Comments25 pages, 6 figures
