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arXiv 0710.2287hep-ph
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R宇称破缺的引力子暗物质

Gravitino Dark Matter with Broken R-parity

Alejandro Ibarra

摘要:

引力子暗物质在大爆炸核合成(BBN)时,由于次锂超对称粒子(NLSP)的存在而面临潜在的宇宙学问题。一个非常简单的,虽然激进的解决方案,以避免所有这些问题包括假设R-宇称轻微违反,因为在这种情况下,NLSP衰变之前的BBN的发病。值得注意的是,即使引力子在这种情况下不再稳定,它仍然是一个非常有希望的暗物质候选者。在这次演讲中,我们回顾了这种情况的动机,我们提出了一个模型,自然产生的R-宇称破缺参数的正确大小,以产生一个一致的宇宙热历史,同时满足所有的实验室和宇宙学界限的R-宇称破缺。我们还讨论了可能的签名,这种情况下在伽马射线天文台和对撞机。

英文摘要:

Scenarios with gravitino dark matter face potential cosmological problems induced by the presence of the Next-to-Lightest Supersymmetric Particle (NLSP) at the time of Big Bang Nucleosynthesis (BBN). A very simple, albeit radical, solution to avoid all these problems consists on assuming that R-parity is slightly violated, since in this case the NLSP decays well before the onset of BBN. Remarkably, even if the gravitino is no longer stable in this scenario, it still constitutes a very promising dark matter candidate. In this talk we review the motivations for this scenario and we present a model that naturally generates R-parity breaking parameters of the right size to produce a consistent thermal history of the Universe, while satisfying at the same time all the laboratory and cosmological bounds on R-parity breaking. We also discuss possible signatures of this scenario at gamma ray observatories and at colliders.

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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