Axionic dark energy and a composite QCD axion

Journal Article · Fri May 15 00:00:00 EDT 2009 · Journal of Cosmology and Astroparticle Physics

DOI:https://doi.org/10.1088/1475-7516/2009/05/010· OSTI ID:22156992

Kim, Jihn E. ^[1]

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1. Department of Physics and Astronomy and Center for Theoretical Physics, Seoul National University, Seoul 151-747 (Korea, Republic of)

We discuss the idea that the model-independent (MI) axion of string theory is the source of quintessential dark energy. The scenario is completed with a composite QCD axion from hidden sector squark condensation that could serve as dark matter candidate. The mechanism relies on the fact that the hidden sector anomaly contribution to the composite axion is much smaller than the QCD anomaly term. This intuitively surprising scenario is based on the fact that below the hidden sector scale {Lambda}{sub h} there are many light hidden sector quarks. Simply, by counting engineering dimensions the hidden sector instanton potential can be made negligible compared to the QCD anomaly term.

• OSTI ID: 22156992
• Journal Information: Journal of Cosmology and Astroparticle Physics, Vol. 2009, Issue 05; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 1475-7516
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
AXIONS
NONLUMINOUS MATTER
POTENTIALS
QUANTUM CHROMODYNAMICS
S QUARKS
STRING THEORY
VISIBLE RADIATION