论文标题
exotic Higgs在CEPC上衰减中的Electroweak相变的研究
Study of Electroweak Phase Transition in Exotic Higgs Decays at the CEPC
论文作者
论文摘要
强型一阶电动相变（EWPT）可以通过弱耦合到希格斯的新物理学诱导。这项研究的重点是一阶Ewpt由轻标量$ S $驱动的场景，质量在15-60 GEV之间。搜索希格斯玻色子的异国情调腐烂成一对旋转零粒子，即$ h \ to ss $，$ s $ boson衰减迅速呈现为$ b $ -quarks。该搜索是在与$ z $玻色子联合生产的Higgs Boson的活动中进行的，从而产生了两个带电的Leptons（电子或MUON）的签名和$ B $ QUAKARK DECASE的多个Jets。该分析正在考虑分析5000 fb $^{ - 1} $ $ e^+ e^ - $ collision Data的场景，$ \ sqrt {s} = 240 $ GEV从圆形电子potitron Collider（CEPC）中。这项以$ 4B $最终状态的研究最终测试了CEPC实验中探测光标量的预期灵敏度。灵敏度范围明显大于在LHC上可以实现的灵敏度。
A strong first-order electroweak phase transition (EWPT) can be induced by light new physics weakly coupled to the Higgs. This study focuses on a scenario in which the first-order EWPT is driven by a light scalar $s$ with a mass between 15-60 GeV. A search for exotic decays of the Higgs boson into a pair of spin-zero particles, $h \to ss$, where the $s$-boson decays into $b$-quarks promptly is presented. The search is performed in events where the Higgs boson is produced in association with a $Z$ boson, giving rise to a signature of two charged leptons (electrons or muons) and multiple jets from $b$-quark decays. The analysis is considering a scenario of analysing 5000 fb$^{-1}$ $e^+ e^-$ collision data at $\sqrt{s} = 240 $ GeV from the Circular Electron Positron Collider (CEPC). This study with $4b$ final state conclusively tests the expected sensitivity of probing the light scalars in the CEPC experiment. The sensitivity reach is significantly larger than that can be achieved at the LHC.
