A keV String Axion from High Scale Supersymmetry
A keV String Axion from High Scale Supersymmetry
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来自高尺度超对称的 keV 弦轴子
DOI：
10.1103/physrevd.91.045036
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
Tsutomu T. Yanagida
中科院分区：
文献类型：
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作者：
Brian Henning;John Kehayias;Hitoshi Murayama;David Pinner;Tsutomu T. Yanagida
各种理论和实验考虑激发了具有高尺度超对称性破缺的模型。虽然此类模型可能难以在对撞机中进行测试，但我们建议寻找低得多能量的特征。我们证明，星系团 X 射线光谱中的 keV 线（例如最近有争议的 3.5-keV 观测）可能起源于与隐藏的超对称破缺扇区耦合的通用弦轴子。弦轴子和隐藏扇区中的附加轴子的线性组合仍然很轻，通过超对称破缺动力学获得 10 keV 量级的质量。为了解释X射线，超对称破缺的尺度必须约为。这激发了纯重力中介或最小分裂超对称性中的高尺度超对称性，并且与所有当前限制一致。由于轴子质量由动态质量尺度控制，因此在膨胀过程中该质量可以高得多，从而避免与高尺度膨胀相关的等曲率（和畴壁）问题。在附录中，我们提出了一种膨胀子稳定机制，该机制还可以通过异常调节来改变高吉诺质量。
Various theoretical and experimental considerations motivate models with high-scale supersymmetry breaking. While such models may be difficult to test in colliders, we propose looking for signatures at much lower energies. We show that a keV line in the x-ray spectrum of galaxy clusters (such as the recently disputed 3.5-keV observation) can have its origin in a universal string axion coupled to a hidden supersymmetry breaking sector. A linear combination of the string axion and an additional axion in the hidden sector remains light, obtaining a mass of order 10 keV through supersymmetry breaking dynamics. In order to explain the x-ray line, the scale of supersymmetry breaking must be about. This motivates high-scale supersymmetry as in pure gravity mediation or minimal split supersymmetry and is consistent with all current limits. Since the axion mass is controlled by a dynamical mass scale, this mass can be much higher during inflation, avoiding isocurvature (and domain wall) problems associated with high-scale inflation. In an appendix, we present a mechanism for dilaton stabilization that additionally leads tomodifications of the gaugino mass from anomaly mediation.