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arXiv 1003.3033hep-phhep-ex
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在LHC上通过矢量玻色子散射探索Higgs三重态模型

Exploring Higgs Triplet Models via Vector Boson Scattering at the LHC

Stephen Godfrey, Ken Moats

摘要:

我们给出了在LHC的W^\pm、W^ \pm、W^ \pm Z、W^+ W^-和Z Z通道中,在最小希格斯、左右对称和Georgi-Machacek模型中产生希格斯三重玻色子的研究结果。我们专注于“镀金”的纯轻子衰变模式,并考虑不可约的电弱,QCD,和t-夸克背景,应用组合的向前喷流标记,中央喷流否决,严格的轻子削减,以抑制背景。我们发现,由于三重态真空期望值(vev)的约束,需要相当大的亮度观察希格斯玻色子矢量玻色子散射三重态。在大型强子对撞机上观测到希格斯三重态在乔治-马查切克模型中是最有希望的,因为对三重态vev的约束较弱。在这个模型中,我们发现在大型强子对撞机上可以观测到质量为1.0(1.5)TeV的希格斯三重玻色子,其积分亮度在W^ \pm W^ \pm通道中低至41(119)fb^{-1},在W^ \pm Z通道中低至171(474)fb^{-1}。在这些通道中观察希格斯三重态玻色子将有助于确定潜在的理论。

英文摘要:

We present the results of a study of Higgs triplet boson production arising in the Littlest Higgs, Left-Right Symmetric, and Georgi-Machacek models in the W^\pm W^\pm, W^\pm Z, W^+ W^-, and Z Z channels at the LHC. We focus on the "gold-plated" purely leptonic decay modes and consider the irreducible electroweak, QCD, and t-quark backgrounds, applying a combination of forward-jet-tagging, central-jet-vetoing, and stringent leptonic cuts to suppress the backgrounds. We find that, given the constraints on the triplet vacuum expectation value (vev), considerable luminosity is required to observe Higgs triplet bosons in vector boson scattering. Observing a Higgs triplet at the LHC is most promising in the Georgi-Machacek model due to a weaker constraint on the triplet vev. In this model, we find that a Higgs triplet boson with a mass of 1.0 (1.5) TeV can be observed at the LHC with an integrated luminosity as low as 41 (119) fb^{-1} in the W^\pm W^\pm channel and as low as 171 (474) fb^{-1} in the W^\pm Z channel. Observation of Higgs triplet bosons in these channels would help identify the underlying theory.

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