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arXiv 1306.5878hep-ph
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光费米子非对称暗物质唯象

Phenomenology of Light Fermionic Asymmetric Dark Matter

Biplob Bhattacherjee, Shigeki Matsumoto, Satyanarayan Mukhopadhyay, Mihoko M. Nojiri

摘要:

非对称暗物质(ADM)是一种很有吸引力的可能性,它试图解释宇宙中重子与暗物质丰度之比。玻色子ADM受到旧中子星存在的限制,而费米子ADM需要额外的轻粒子才能在早期宇宙中湮灭其对称分量。我们重新审视了包含轻标量态的最小GeV尺度费米ADM模型的现象学。从宇宙学,暗物质直接探测,味物理和对撞机搜索目前对这种情况的限制进行了详细的研究。我们估计未来达到的模型参数空间从下一代暗物质直接探测实验,希格斯玻色子的性质测量和寻找轻标量在大型强子对撞机,以及希格斯不可见的分支比在拟议的ILC的测定。

英文摘要:

Asymmetric dark matter (ADM) has been an attractive possibility attempting to explain the observed ratio of baryon to dark matter abundance in the universe. While a bosonic ADM is constrained by the limits from existence of old neutron stars, a fermionic ADM requires an additional light particle in order to annihilate its symmetric component in the early universe. We revisit the phenomenology of a minimal GeV scale fermionic ADM model including a light scalar state. The current constraints on this scenario from cosmology, dark matter direct detection, flavour physics and collider searches are investigated in detail. We estimate the future reach on the model parameter space from next-generation dark matter direct detection experiments, Higgs boson property measurements and search for light scalars at the LHC, as well as the determination of Higgs invisible branching ratio at the proposed ILC.

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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