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arXiv 2103.12089hep-phhep-ex
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Higgs三驾马车模型中重子生成的Multi-TeV信号

Multi-TeV Signals of Baryogenesis in Higgs Troika Model

Hooman Davoudiasl, Ian M. Lewis, Matthew Sullivan

摘要:

在标准模型的基础上再增加两个希格斯二重态--希格斯三驾马车模型--就可以为重子生成提供一个很好的假设,如果中微子是狄拉克费米子的话。适应“自发味违反”的框架,我们认为一个版本的三驾马车模型轻夸克有显着的耦合到新的多TeV希格斯状态。新标量的共振产生导致di-jet或顶对信号是这种设置的典型预测。与对撞机现象学相关的初态和末态夸克在重子生成中也起着关键作用,可能在高能实验中直接进入相关的早期宇宙物理学。可行的重子生成一般倾向于在观测到的希格斯态和假设的希格斯态之间的质量等级。我们发现,在未来的100 TeV的$pp$对撞机和间接搜索的味道实验中,直接搜索之间存在互补性,都敏感的不同区域的参数空间相关的重子。特别是,测量$D-\bar{D}$混合在LHCb探测许多有趣的参数空间。直接和间接的搜索可以发现质量高达$\mathcal{O}(10)$ TeV的新希格斯态,从而为研究这个模型提供了令人印象深刻的范围。

英文摘要:

A modest extension of the Standard Model by two additional Higgs doublets - the Higgs Troika Model - can provide a well-motivated scenario for successful baryogenesis if neutrinos are Dirac fermions. Adapting the "Spontaneous Flavor Violation" framework, we consider a version of the Troika model where light quarks have significant couplings to the new multi-TeV Higgs states. Resonant production of new scalars leading to di-jet or top-pair signals are typical predictions of this setup. The initial and final state quarks relevant to the collider phenomenology also play a key role in baryogenesis, potentially providing direct access to the relevant early Universe physics in high energy experiments. Viable baryogenesis generally prefers some hierarchy of masses between the observed and the postulated Higgs states. We show that there is a complementarity between direct searches at a future 100 TeV $pp$ collider and indirect searches at flavor experiments, with both sensitive to different regions of parameter space relevant for baryogenesis. In particular, measurements of $D-\bar{D}$ mixing at LHCb probe much of the interesting parameter space. Direct and indirect searches can uncover the new Higgs states up to masses of $\mathcal{O}(10)$ TeV, thereby providing an impressive reach to investigate this model.

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