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arXiv 1503.07863astro-ph.COhep-ph
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宇宙中微子背景声振荡相移的首次探测

A First Detection of the Acoustic Oscillation Phase Shift Expected from the Cosmic Neutrino Background

Brent Follin, Lloyd Knox, Marius Millea, Zhen Pan

摘要:

在重子-光子等离子体复合之前,宇宙学中微子的不受阻碍的相对论性传播改变了引力势,从而改变了声振荡的时间依赖性引力驱动的细节。我们在这里报告的第一次检测到的振荡,我们推断从他们的签名在宇宙微波背景(CMB)温度功率谱的时间相位的变化。

英文摘要:

The unimpeded relativistic propagation of cosmological neutrinos prior to recombination of the baryon-photon plasma alters gravitational potentials and therefore the details of the time-dependent gravitational driving of acoustic oscillations. We report here a first detection of the resulting shifts in the temporal phase of the oscillations, which we infer from their signature in the Cosmic Microwave Background (CMB) temperature power spectrum.

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