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Invisible QCD as Dark Energy

Authors
  • addazi, andrea
  • alexander, stephon
  • marcianò, antonino
Publication Date
May 31, 2020
Identifiers
DOI: 10.3390/universe6060075
OAI: oai:mdpi.com:/2218-1997/6/6/75/
Source
MDPI
Keywords
Language
English
License
Green
External links

Abstract

We account for the late time acceleration of the Universe by extending the Quantum Chromodynamics (QCD) color to a S U ( 3 ) invisible sector (IQCD). If the Invisible Chiral symmetry is broken in the early universe, a condensate of dark pions (dpions) and dark gluons (dgluons) forms. The condensate naturally forms due to strong dynamics similar to the Nambu&ndash / Jona-Lasinio mechanism. As the Universe evolves from early times to present times the interaction energy between the dgluon and dpion condensate dominates with a negative pressure equation of state and causes late time acceleration. We conclude with a stability analysis of the coupled perturbations of the dark pions and dark gluons.

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