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arXiv 0810.1585hep-phastro-ph
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山顶非高斯性

Hilltop Non-Gaussianity

Masahiro Kawasaki, Kazunori Nakayama, Fuminobu Takahashi

摘要:

研究了具有余弦型标量势的伪南武-戈德斯通玻色子引起的非高斯性。我们专注于如何非高斯性的影响时,伪南武-戈德斯通玻色子滚下从附近的标量势的二次势的偏差是大的顶部。我们发现,由此产生的非高斯性是类似于在二次势中获得的,如果伪南武-戈德斯通玻色子占曲率扰动;非高斯性增强,否则。

英文摘要:

We study non-Gaussianity induced by a pseudo Nambu-Goldstone boson with a cosine-type scalar potential. We focus on how the non-Gaussianity is affected when the pseudo Nambu-Goldstone boson rolls down from near the top of the scalar potential where the deviation from a quadratic potential is large. We find that the resultant non-Gaussianity is similar to that obtained in the quadratic potential, if the pseudo Nambu-Goldstone boson accounts for the curvature perturbation; the non-Gaussianity is enhanced, otherwise.

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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