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arXiv 0710.5737astro-phhep-phhep-th
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与宇宙结构一致的宇宙微波背景特征

A Cosmic Microwave Background feature consistent with a cosmic texture

M. Cruz, N. Turok, P. Vielva, E. Martinez-Gonzalez, M. Hobson

摘要:

宇宙微波背景提供了我们最古老的宇宙图像,也是我们研究宇宙早期演化的最佳工具。高能物理学理论预言在极早期宇宙中会形成各种类型的拓扑缺陷,包括在宇宙微波背景中产生热点和冷点的宇宙结构。我们通过贝叶斯统计分析表明,在全天空图像中观察到的最突出的5度半径冷点,这是很难解释的,与纹理引起的是兼容的。从这个模型中,我们将基本对称性破缺能标限制为phi_0 ~ 8.7 x 10^(15)GeV。如果得到证实,这种对宇宙缺陷的探测将在能量上探测物理学,超过任何可以想象的地球实验。

英文摘要:

The Cosmic Microwave Background provides our most ancient image of the Universe and our best tool for studying its early evolution. Theories of high energy physics predict the formation of various types of topological defects in the very early universe, including cosmic texture which would generate hot and cold spots in the Cosmic Microwave Background. We show through a Bayesian statistical analysis that the most prominent, 5 degree radius cold spot observed in all-sky images, which is otherwise hard to explain, is compatible with having being caused by a texture. From this model, we constrain the fundamental symmetry breaking energy scale to be phi_0 ~ 8.7 x 10^(15) GeV. If confirmed, this detection of a cosmic defect will probe physics at energies exceeding any conceivable terrestrial experiment.

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