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arXiv 1303.3010hep-ph
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在LHC发现类希格斯玻色子后的惰性双态模型中的暗物质

Dark matter in the Inert Doublet Model after the discovery of a Higgs-like boson at the LHC

A. Goudelis, B. Herrmann, O. Stål

摘要:

我们检查惰性双重模型的光的希格斯玻色子的发现,质量约为126 GeV的大型强子对撞机。我们评估单圈修正的标量质量和执行的单圈重整化群方程的数值解。要求真空稳定性,微扰性和S-矩阵酉性,我们计算的规模,该模型可以外推。由此,我们得出的约束条件的模型参数的存在下,126 GeV的希格斯玻色子。我们进行了一个改进的计算的暗物质遗迹密度与希格斯质量固定的测量值,考虑到三体和四体的最终状态所产生的规范玻色子在暗物质湮灭的离壳生产的影响。讨论了与直接探测暗物质有关的问题,特别是强子不确定性的作用。对于满足所有模型约束条件的情形,给出了对有趣的衰变模式h ->γγ的预测,并讨论了在这个模型中,带电惰性标量对这种衰变率的潜在增强与暗物质的性质之间的关系.我们还应用LHC限制希格斯玻色子衰变到不可见的最终状态,这提供了额外的限制的质量的暗物质候选人。最后,我们提出了三个基准点,捕捉相关现象学的不同方面。

英文摘要:

We examine the Inert Doublet Model in light of the discovery of a Higgs-like boson with a mass of roughly 126 GeV at the LHC. We evaluate one-loop corrections to the scalar masses and perform a numerical solution of the one-loop renormalization group equations. Demanding vacuum stability, perturbativity, and S-matrix unitarity, we compute the scale up to which the model can be extrapolated. From this we derive constraints on the model parameters in the presence of a 126 GeV Higgs boson. We perform an improved calculation of the dark matter relic density with the Higgs mass fixed to the measured value, taking into account the effects of three- and four-body final states resulting from off-shell production of gauge bosons in dark matter annihilation. Issues related to direct detection of dark matter are discussed, in particular the role of hadronic uncertainties. The predictions for the interesting decay mode h ->γγ are presented for scenarios which fulfill all model constraints, and we discuss how a potential enhancement of this rate from the charged inert scalar is related to the properties of dark matter in this model. We also apply LHC limits on Higgs boson decays to invisible final states, which provide additional constraints on the mass of the dark matter candidate. Finally, we propose three benchmark points that capture different aspects of the relevant phenomenology.

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