标题： 宇宙学对超对称破缺尺度的限制 显示英文标题

标题： Cosmological Constraints on the Scale of Supersymmetry Breaking

摘要： 我们研究了与隐藏扇区相关的大质量超弦轴子 $E_8 \times E_8^\prime$ 衰变的宇宙学和天体物理学限制。 我们发现，大于 1 秒的衰变寿命被核合成限制、宇宙微波背景和伽马射线背景畸变限制以及闭合论据排除。 我们得出结论： $\Lambda>1.2\times10^{13}\gev$，其中 $\Lambda$ 是隐藏扇区中规范玻色子凝聚的尺度。 这意味着超对称破缺的尺度大于 $10^{10}\gev$。 尤为重要的是，我们的结果与通过令超对称标量质量等于 $m_W$ 独立得到的 $\L$ 的 $5\times 10^{13}\gev$ 值一致。 显示英文摘要

摘要： We consider the cosmological and astrophysical constraints on the decay of massive $E_8 \times E_8^\prime$ superstring axions associated with the hidden sector. We find that decay lifetimes greater than 1 s are ruled out by limits from nucleosynthesis, by limits on the distortion of the cosmic microwave and gamma ray backgrounds and by closure arguments. We conclude that $\Lambda>1.2\times10^{13}\gev$, where $\Lambda$ is the scale of gaugino condensation in the hidden sector. This implies that the scale of supersymmetry breaking is greater than $10^{10}\gev$. Significantly, our result agrees with the value of $5\times 10^{13}\gev$ for $\L$ obtained independently by setting supersymmetric scalar masses equal to $m_W$.