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arXiv 1107.2398hep-phhep-ex
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非最小Higgs扇区中早期希格斯玻色子玻色子的发现

Early Higgs Boson Discovery in Non-minimal Higgs Sectors

Spencer Chang, Jared A. Evans, Markus A. Luty

备注：
4 pages, 3 figures
发表信息：
Phys.Rev. D84 (2011) 095030
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摘要：

具有多个希格斯玻色子玻色子的粒子物理模型出现在标准模型之外的许多物理框架中，包括超对称性，人工色，复合希格斯和“小希格斯”模型。如果希格斯扇区包含比电弱规范耦合更强的耦合，则会有重希格斯粒子衰变为更轻的希格斯粒子加上重粒子，如$W$，$Z$和$t$。这促使搜索涉及多个$W$、$Z$、$t$和$\bar{b}b$对的最终状态。具有保管对称性的两希格斯双重态模型是描述许多这些信号的有用简化模型。该模型可以通过物理希格斯质量和混合角$\al$和$\be$来参数化，因此在该参数空间中的发现或排除具有直接的物理解释。我们说明了这一点，详细分析的过程$gg \to A$其次是$A \to h Z$和$h \to WW$。对于$m_{A} \simeq 330\GeV$、$m_{h} \simeq 200\GeV$，我们可以在大型强子对撞机上得到积分光度为1 fb ${}^{-1}$的$4.5\si$信号。

英文摘要：

Particle physics models with more than one Higgs boson occur in many frameworks for physics beyond the standard model, including supersymmetry, technicolor, composite Higgs, and "little Higgs" models. If the Higgs sector contains couplings stronger than electroweak gauge couplings, there will be heavy Higgs particles that decay to lighter Higgs particles plus heavy particles such as $W$, $Z$, and $t$. This motivates searches for final states involving multiple $W$, $Z$, $t$, and $\bar{b}b$ pairs. A two Higgs doublet model with custodial symmetry is a useful simplified model to describe many of these signals. The model can be parameterized by the physical Higgs masses and the mixing angles $\al$ and $\be$, so discovery or exclusion in this parameter space has a straightforward physical interpretation. We illustrate this with a detailed analysis of the process $gg \to A$ followed by $A \to h Z$ and $h \to WW$. For $m_{A} \simeq 330\GeV$, $m_{h} \simeq 200\GeV$ we can get a $4.5\si$ signal with 1 fb${}^{-1}$ of integrated luminosity at the Large Hadron Collider.

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