论文标题
更天然的复合希格斯模型
A More Natural Composite Higgs Model
论文作者
论文摘要
复合希格斯模型为层次结构问题提供了有吸引力的解决方案。但是，许多现实的模型都遇到了希格斯潜力中的调整问题。从复合共振的紫外线动力学到希格斯的电位，通常需要大量贡献，而二次项和四个术语之间的调整是要分离electroweak断裂量表和综合量表。我们考虑基于$ SU（6）/sp（6）$ coset的复合希格斯模型，其中增强的对称性可以使Higgs二次术语最小化。此外，可以通过基本标准模型费米和复合操作员之间的部分综合耦合来实现来自小型希格斯机制的集体对称性破坏的希格斯四分之一术语，而无需在标准模型和复合扇区之外引入新的基本领域。该模型包含两个Higgs Doublet，以及其他几个伪-Nambu-Goldstone玻色子。为了避免调整，预计额外的希格斯玻色子相对较轻，可能会在未来的LHC运行中进行探测。希格斯耦合的偏差和弱仪玻色子耦合也提供了重要的测试，因为预计它们接近该模型的当前限制。
Composite Higgs models provide an attractive solution to the hierarchy problem. However, many realistic models suffer from tuning problems in the Higgs potential. There are often large contributions from the UV dynamics of the composite resonances to the Higgs potential, and tuning between the quadratic term and the quartic term is required to separate the electroweak breaking scale and the compositeness scale. We consider a composite Higgs model based on the $SU(6)/Sp(6)$ coset, where an enhanced symmetry on the fermion resonances can minimize the Higgs quadratic term. Moreover, a Higgs quartic term from the collective symmetry breaking of the little Higgs mechanism can be realized by the partial compositeness couplings between elementary Standard Model fermions and the composite operators, without introducing new elementary fields beyond the Standard Model and the composite sector. The model contains two Higgs doublets, as well as several additional pseudo-Nambu-Goldstone bosons. To avoid tuning, the extra Higgs bosons are expected to be relatively light and may be probed in the future LHC runs. The deviations of the Higgs couplings and the weak gauge boson couplings also provide important tests as they are expected to be close to the current limits in this model.
