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arXiv 0804.3792hep-phastro-ph
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私有希格斯模型中的暗物质

Dark Matter in the Private Higgs Model

C. B. Jackson

摘要:

在费米子质谱中观察到的极大的层次结构仍然是粒子物理学中最令人困惑和未解决的问题之一。然而,在最近的一个提议中,通过在每个费米子中引入一个希格斯偶线(或私人希格斯),可以使每个费米子与其各自的有序统一的希格斯玻色子之间的汤川耦合变得自然。在私人希格斯场景的有趣预测中,有各种标量可以在未来的对撞机实验中探测,也有可能是暗物质的候选者。在本文中,我们详细研究了私有希格斯模型的暗物质部分。我们首先计算了该模型中暗物质的湮灭截面,发现用相对自然的模型参数值可以很容易地解释宇宙中观测到的暗物质密度。最后,我们探讨了通过观测来自星系晕的异常伽马射线间接探测私人希格斯暗物质的可能性。我们表明,大量的光子流可以从私人希格斯暗物质的湮灭产生,这样,如果有相当大的暗物质在星系晕的结块,这些伽马射线的通量可以观察到地面望远镜阵列,如VERITAS和HESS。

英文摘要:

The extremely large hierarchy observed in the fermion mass spectrum remains as one of the most puzzling and unresolved issues in particle physics. In a recent proposal, however, it was demonstrated that by introducing one Higgs doublet (or Private Higgs) per fermion this hierarchy could be made natural by making the Yukawa couplings between each fermion and its respective Higgs boson of order unity. Among the interesting predictions of the Private Higgs scenario is a variety of scalars which could be probed at future collider experiments and a possible dark matter candidate. In this paper, we study in some detail the dark matter sector of the Private Higgs model. We first calculate the annihilation cross sections of dark matter in this model and find that one can easily account for the observed density of dark matter in the Universe with relatively natural values of the model's parameters. Finally, we investigate the possibility of detecting Private Higgs dark matter indirectly via the observation of anomalous gamma rays originating from the galactic halo. We show that a substantial flux of photons can be produced from the annihilation of Private Higgs dark matter such that, if there is considerable clumping of dark matter in the galactic halo, the flux of these gamma rays could be observed by ground-based telescope arrays such as VERITAS and HESS.

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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