We consider a strongly interacting twin Higgs (SITH) model where an ultraviolet completion of twin Higgs mechanism is realized by a strongly coupled approximately scale invariant theory. Besides the Standard Model (SM) and twin sectors, the low energy effective theory contains a relatively light scalar called a dilaton — the pseudo Goldstone boson of spontaneously broken scale invariance. The dilaton provides a unique portal between the SM and twin sectors whose phenomenology could provide an important probe of the twin Higgs mechanism. As a concrete example, we consider a holographic twin Higgs model where the role of the dilaton is played by the radion. The phenomenology of this model is fully determined by a few parameters and our analysis concludes that at the HL-LHC (14 TeV) and HE-LHC (27 TeV) with 3000 fb − 1 most of the natural parameter space can be probed.

中文翻译：

---

强相互作用孪生希格斯模型中的 Dilaton 门户

我们考虑强相互作用孪生希格斯 (SITH) 模型，其中孪生希格斯机制的紫外线完成是通过强耦合近似尺度不变理论实现的。除了标准模型 (SM) 和双扇区之外，低能量有效理论还包含一个相对较轻的标量，称为膨胀子——自发破坏尺度不变性的伪戈德斯通玻色子。膨胀在 SM 和孪生扇区之间提供了一个独特的入口，其现象学可以提供对孪生希格斯机制的重要探索。作为一个具体的例子，我们考虑一个全息孪生希格斯模型，其中膨胀子的作用由无线电子扮演。