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arXiv 1004.4890hep-ph
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具有轻隐扇形的超对称轻子生成

Supersymmetric Leptogenesis with a Light Hidden Sector

Andrea De Simone, Mathias Garny, Alejandro Ibarra, Christoph Weniger

摘要:

超对称的情况下,将热leptogenesis作为观察到的物质-反物质不对称性的起源一般预测的原始元素的丰度与观察相冲突。在本文中,我们提出了一个简单的方法来规避这种紧张局势,并适应自然的热leptogenesis和原始核合成。我们假设存在一个轻的隐藏部门,耦合非常弱的最小超对称标准模型,这开辟了新的衰变通道的次轻超对称粒子,从而稀释其丰度在核合成。我们提出了一个一般的模型独立的分析,这种机制以及两个具体的实现,并描述了相关的宇宙学和天体物理学的界限和影响,这种暗物质的情况。在对撞机和宇宙射线观测可能的实验签名进行了讨论。

英文摘要:

Supersymmetric scenarios incorporating thermal leptogenesis as the origin of the observed matter-antimatter asymmetry generically predict abundances of the primordial elements which are in conflict with observations. In this paper we propose a simple way to circumvent this tension and accommodate naturally thermal leptogenesis and primordial nucleosynthesis. We postulate the existence of a light hidden sector, coupled very weakly to the Minimal Supersymmetric Standard Model, which opens up new decay channels for the next-to-lightest supersymmetric particle, thus diluting its abundance during nucleosynthesis. We present a general model-independent analysis of this mechanism as well as two concrete realizations, and describe the relevant cosmological and astrophysical bounds and implications for this dark matter scenario. Possible experimental signatures at colliders and in cosmic-ray observations are also discussed.

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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