Higgsed Gauge-flation

被引：41

作者：

Adshead, Peter ^{[1
]}

Sfakianakis, Evangelos I. ^{[1
]}

机构：

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

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2017年 / 08期

基金：

美国能源部;

关键词：

Cosmology of Theories beyond the SM; Spontaneous Symmetry Breaking; INFLATIONARY UNIVERSE; COSMOLOGICAL MODELS; FLUCTUATIONS; RADIATION; SPECTRUM; FLATNESS; HORIZON;

D O I：

10.1007/JHEP08(2017)130

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

We study a variant of Gauge-flation where the gauge symmetry is spontaneously broken by a Higgs sector. We work in the Stueckelberg limit and demonstrate that the dynamics remain (catastrophically) unstable for cases where the gauge fi eld masses satisfy gamma < 2, where gamma = g(2)psi(2)/H-2, g is the gauge coupling, psi is the gauge fi eld vacuum expectation value, and H is the Hubble rate. We compute the spectrum of density fluctuations and gravitational waves, and show that the model can produce observationally viable spectra. The background gauge fi eld texture violates parity, resulting in a chiral gravitational wave spectrum. This arises due to an exponential enhancement of one polarization of the spin-2 fluctuation of the gauge fi eld. Higgsed Gauge-flation can produce observable gravitational waves at inflationary energy scales well below the GUT scale.

引用

页数：50

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