Volume 118, Number 2, April 2017
|Number of page(s)||6|
|Section||Geophysics, Astronomy and Astrophysics|
|Published online||23 June 2017|
An alternative attractor in gauged NJL inflation
1 Information Media Center, Hiroshima University - Higashi-Hiroshima, 739-8521, Japan
2 Core of Research for the Energetic Universe, Hiroshima University - Higashi-Hiroshima, 739-8526, Japan
3 Institució Catalana de Recerca i Estudis Avançats (ICREA) - Barcelona, Spain
4 Institute of Space Sciences (IEEC-CSIC) - C. Can Magrans s/n, 08193 Barcelona, Spain
5 Department of Physics, Hiroshima University - Higashi-Hiroshima, 739-8526, Japan
6 National Research Tomsk State University - 634050, Tomsk, Russia
7 Tomsk State Pedagogical University - 634061, Tomsk, Russia
Received: 2 May 2017
Accepted: 7 June 2017
We have investigated the attractor structure for the CMB fluctuations in a composite inflation scenario within the gauged Nambu–Jona-Lasinio (NJL) model. Such composite inflation represents an attractor which cannot be found in a fundamental scalar model. As is known, the number of inflationary models contains the attractor classified by the α-attractor model. It is found that the attractor inflation in the gauged NJL model corresponds to the case.
PACS: 98.80.Cq – Particle-theory and field-theory models of the early Universe (including cosmic pancakes, cosmic strings, chaotic phenomena, inflationary universe, etc.) / 04.62.+v – Quantum fields in curved spacetime / 12.60.Rc – Composite models
© EPLA, 2017
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