Gravitational waves from fermion production during axion inflation

被引：15

作者：

Adshead, Peter ^{[1
]}

Pearce, Lauren ^{[1
]}

Peloso, Marco ^{[2
,3
]}

Roberts, Michael A. ^{[4
]}

Sorbo, Lorenzo ^{[4
]}

机构：

[1] Univ Illinois, Dept Phys, Urbana, IL 61801 USA

[2] Univ Padua, Dipartimento Fis & Astron G Galilei, I-35131 Padua, Italy

[3] Ist Nazl Fis Nucl, Sez Padova, Via Marzolo 8, I-35131 Padua, Italy

[4] Univ Massachusetts, Dept Phys, Amherst Ctr Fundamental Interact, Amherst, MA 01003 USA

来源：

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2019年 / 10期

基金：

美国国家科学基金会;

关键词：

inflation; primordial gravitational waves (theory); cosmological perturbation theory; axions;

D O I：

10.1088/1475-7516/2019/10/018

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present analytic results for the gravitational wave power spectrum induced in models where the inflaton is coupled to a fermionic pseudocurrent. We show that although such a coupling creates helically polarized fermions, the polarized component of the resulting gravitational waves is parametrically suppressed with respect to the non-polarized one. We also show that the amplitude of the gravitational wave signal associated to this production cannot exceed that generated by the standard mechanism of amplification of vacuum fluctuations.

引用

页数：29

共 60 条

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