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arXiv 1610.00680hep-phastro-ph.CO
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松弛窗口上的约束

Constraints on Relaxion Windows

Kiwoon Choi, Sang Hui Im

摘要:

我们研究了弱尺度层次问题的弛豫解的低能现象。假设哈勃摩擦是负责耗散的弛豫能量,我们确定宇宙学弛豫窗口,对应的参数区域兼容的一个给定的值的可接受的通货膨胀$e$ -折叠。然后,我们讨论了各种观测约束的弛豫窗口,包括天体物理和宇宙学的考虑。我们发现,大多数的参数空间与弛豫质量$m_ϕ\gtrsim 100$ eV或弛豫衰减常数$f\lesssim 10^7$ GeV被排除在现有的限制。有一个有趣的参数区域与$m_ϕ\sim \,0.2-10$ GeV和$f\sim\, {\rm few}-200$ TeV,这是允许的现有的限制,但可以探讨很快通过未来的束流收集实验,如SHiP实验,或通过改进的EDM实验。

英文摘要:

We examine the low energy phenomenology of the relaxion solution to the weak scale hierarchy problem. Assuming that the Hubble friction is responsible for a dissipation of the relaxion energy, we identify the cosmological relaxion window which corresponds to the parameter region compatible with a given value of the acceptable number of inflationary $e$-foldings. We then discuss a variety of observational constraints on the relaxion window, including those from astrophysical and cosmological considerations. We find that majority of the parameter space with a relaxion mass $m_ϕ\gtrsim 100$ eV or a relaxion decay constant $f\lesssim 10^7$ GeV is excluded by existing constraints. There is an interesting parameter region with $m_ϕ\sim \,0.2-10$ GeV and $f\sim\, {\rm few}-200$ TeV, which is allowed by existing constraints, but can be probed soon by future beam dump experiments such as the SHiP experiment, or by improved EDM experiments.

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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