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arXiv 2102.08386hep-phhep-ex
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在μ子对撞机上的2 HDM重希格斯玻色子玻色子

Heavy Higgs Bosons in 2HDM at a Muon Collider

Tao Han, Shuailong Li, Shufang Su, Wei Su, Yongcheng Wu

摘要:

在多TeV μ子对撞机上研究了双Higgs双重模型(2 HDMs)中非标准模型(SM)重希格斯玻色子玻色子的发现潜力,并探讨了不同类型2 HDMs的分辨能力.我们发现,通过通用规范相互作用的非SM希格斯玻色子玻色子的对生产是占主导地位的机制,一旦超过运动学阈值。与一对重费米子相关的单个希格斯玻色子的产生在具有增强的汤川耦合的参数区域中可能是重要的。对于两个信号末态,除了在高质心能量下,随着能量的增加,VBF过程得到大的对数增强外,$μ^+μ^-$湮灭通道在矢量玻色子融合(VBF)过程中占主导地位。单希格斯玻色子$s$ -在$μ^+μ^-$中的通道产生-通过辐射返回的湮灭对于非常大的$\tanβ$区域中的L型2 HDM也很重要,将重希格斯玻色子质量的运动学范围扩展到对撞机能量。考虑到非SM希格斯玻色子的产生和衰变,信号可以在标准模型背景下被识别。通过湮灭产生电子对,95% C. L.当具有不同最终状态的通道被组合时,在希格斯质量中达到$\sqrt{s}/2$的生产质量阈值的排斥是可能的。包括单一的生产模式可以进一步扩展范围。对于中等和大的$\tanβ$值,可以区分不同类型的2 HDM。

英文摘要:

We study the discovery potential of the non-Standard Model (SM) heavy Higgs bosons in the Two-Higgs-Doublet Models (2HDMs) at a multi-TeV muon collider and explore the discrimination power among different types of 2HDMs. We find that the pair production of the non-SM Higgs bosons via the universal gauge interactions is the dominant mechanism once above the kinematic threshold. Single Higgs boson production associated with a pair of heavy fermions could be important in the parameter region with enhanced Yukawa couplings. For both signal final states, $μ^+μ^-$ annihilation channels dominate over the vector boson fusion (VBF) processes, except at high center of mass energies where the VBF processes receive large logarithmic enhancement with the increase of energies. Single Higgs boson $s$-channel production in $μ^+μ^-$-annihilation via the radiative return can also be important for the Type-L 2HDM in the very large $\tanβ$ region, extending the kinematic reach of the heavy Higgs boson mass to the collider energy. Considering both the production and decay of non-SM Higgs bosons, signals can be identified over the Standard Model backgrounds. With the pair production channels via annihilation, 95\% C.L. exclusion reaches in the Higgs mass up to the production mass threshold of $\sqrt{s}/2$ are possible when channels with different final states are combined. Including single production modes can extended the reach further. Different types of 2HDMs can be distinguishable for moderate and large values of $\tanβ$.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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