Kavli Institute for Astrophysics and Space Research, MIT, Cambridge, Massachusetts 02139, USA.
Phys Rev Lett. 2009 Dec 18;103(25):251301. doi: 10.1103/PhysRevLett.103.251301. Epub 2009 Dec 14.
We consider contributions to non-Gaussianity of the cosmic microwave background (CMB) from remnants of phase transitions in the very early Universe. Such signatures can optimistically be used to discover evidence of new particle physics through cosmological observations. More conservatively they may provide an obstacle to extracting information about the non-Gaussian nature of primordial density fluctuations from any detection in the CMB. We study this explicitly by computing the bispectrum from global textures, which occur in a wide class of particle physics models.
我们考虑了宇宙微波背景（CMB）中非高斯性的贡献来自早期宇宙相变的残余物。这些特征可以通过宇宙观测来发现新的粒子物理证据，这是一种乐观的看法。更保守地说，它们可能会对从 CMB 中的任何探测中提取原始密度涨落的非高斯性质的信息造成障碍。我们通过计算全局纹理的双谱来明确地研究这一点，全局纹理出现在广泛的粒子物理模型中。
