关于来自同位素宇宙双折射的早期暗能量的限制
Johannes R Eskilt1,2, Laura Herold3, Eiichiro Komatsu3,4
1Institute of Theoretical Astrophysics, University of Oslo, P.O. Box 1029 Blindern, N-0315 Oslo, Norway.
Physical review letters
|October 6, 2023
概括
宇宙微波背景极化数据不支持早期的暗能量模型与轴子类场. 这项研究为光子轴合常数提供了第一个约束,影响了弦理论等理论.
科学领域:
- 宇宙学的宇宙学是什么?
- 粒子物理学 粒子物理学
背景情况:
- 宇宙微波背景 (CMB) 两极化对违反平价的新物理非常敏感.
- 早期的暗能量 (EDE) 模型具有轴状场,为哈勃张力提供了解决方案.
- 在EDE模型中的光子轴合预测了特定的CMB偏振模式.
研究的目的:
- 使用普朗克CMB偏振数据,测试EDE模型的特定电位V(φ) [1-cos(φ/f) ]^{3}.
- 在EDE框架内限制光子轴合常数 (g).
- 探索对基本物理学的影响,包括弦理论.
主要方法:
- 从EDE模型将预测的EB功率频谱与普朗克极化数据相匹配.
- 分析E和B模式极化场的交叉相关功率光谱.
- 对光子轴合常数的导出约束,独立于仪器效应和前景.
主要成果:
- 由EDE模型预测的独特的EB功率频谱不受普朗克数据的支持.
- 获得了光子轴合常数的第一个约束:g=(0.04±0.16) M_{Pl}^{-1} (68% C.L. ) 的情况.
- 该约束适用于最适合CMB和星系聚类数据的EDE模型.
结论:
- 经过测试的EDE模型受到当前CMB极化观测的不利影响.
- 光子轴合常数的导出极限对理论物理学有重大影响.
- 这项研究为早期宇宙物理学和标准模型的潜在扩展提供了宝贵的见解.
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