Unified composite scenario for inflation and dark matter in the Nambu–Jona-Lasinio model

Phongpichit Channuie and Chi Xiong
Phys. Rev. D 95, 043521 – Published 21 February 2017

Abstract

In this work, we propose a cosmological scenario inherently based on the effective Nambu–Jona-Lasinio (NJL) model that cosmic inflation and dark matter can be successfully described by a single framework. On the one hand, the scalar channel of the NJL model plays a role of the composite inflaton (CI) and we show that it is viable to achieve successful inflation via a nonminimal coupling to gravity. For model of inflation, we compute the inflationary parameters and confront them with recent Planck 2015 data. We discover that the predictions of the model are in excellent agreement with the Planck analysis. We also present in our model a simple connection of physics from the high scales to low scales via renormalization group equations (RGEs) of the physical parameters and use them to estimate the range of relevant parameters. On the other hand, the pseudoscalar channel can be assigned as a candidate for composite dark matter (CD). For a model of dark matter, we couple the pseudoscalar to the Higgs sector of the standard model with the coupling strength κ and estimate its thermally averaged relic abundance. We discover that the CD mass is strongly sensitive to the coupling κ. We find in case of light CD, Ms<Mh/2, that the required relic abundance is archived for value of its mass Ms61GeV for κ=0.1. However, in this case the CD mass can be lighter when the coupling is getting larger. Moreover, in case of heavy CD, Ms>MW,Z (or >Mh), the required relic abundance can be satisfied for value of the CD mass Ms410GeV for κ=0.5. In contradiction to the light mass case, however, the CD mass in this case can even be heavier when the coupling is getting larger.

  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
1 More
  • Received 29 October 2016

DOI:https://doi.org/10.1103/PhysRevD.95.043521

© 2017 American Physical Society

Physics Subject Headings (PhySH)

Particles & FieldsGravitation, Cosmology & Astrophysics

Authors & Affiliations

Phongpichit Channuie1,* and Chi Xiong2,†

  • 1School of Science, Walailak University, Nakhon Si Thammarat 80160, Thailand
  • 2Institute of Advanced Studies & School of Physical and Mathematical Science, Nanyang Technological University, Singapore 639673, Singapore

  • *channuie@gmail.com
  • xiongchi@ntu.edu.sg

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 95, Iss. 4 — 15 February 2017

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review D

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×