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arXiv 1804.07541astro-ph.COhep-phhep-th
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混合准单场暴胀

Hybrid Quasi-Single Field Inflation

Yi Wang, Yi-Peng Wu, Jun'ichi Yokoyama, Siyi Zhou

摘要:

暴胀过程中大质量粒子的衰变在压缩极限的原始双谱中产生特征信号。这些信号在准单场暴胀的状态下特别独特,在这种状态下,粒子以与哈勃尺度相当的质量振荡。我们应用调查的一类标量粒子,经历了所谓的瀑布相变在等曲率方向驱动的混合通货膨胀的基础上的破胶机制。随着时间变化的质量,一个新的形状的振荡双谱的瀑布相变在膨胀过程中的签名。

英文摘要:

The decay of massive particles during inflation generates characteristic signals in the squeezed limit of the primordial bispectrum. These signals are in particular distinctive in the regime of the quasi-single field inflation, where particles are oscillating with masses comparable to the Hubble scale. We apply the investigation to a class of scalar particles that experience a so-called waterfall phase transition in the isocurvature direction driven by the symmetry-breaking mechanism based on the hybrid inflation scenario. With a time-varying mass, a novel shape of oscillatory bispectrum is presented as the signature of a waterfall phase transition during inflation.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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