Gauge theory in de Sitter space-time from a holographic model
- Fukuoka Institute of Technology, Wajiro, Higashi-ku Fukuoka 811-0295 (Japan)
- Department of Physics, Kyushu University, Hakozaki, Higashi-ku Fukuoka 812-8581 (Japan)
- Department of Physics, Kagoshima University, Korimoto 1-21-35, Kagoshima 890-0065 (Japan)
Yang-Mills (YM) theory with flavor quarks in the dS{sub 4} is studied through the dual supergravity in the AdS{sub 5}xS{sup 5} background with nontrivial dilaton and axion. The flavor quarks are introduced by embedding a probe D7 brane. We find that the dynamical properties of YM theory in the dS{sub 4} are similar to the case of the finite temperature theory given by the 5d AdS-Schwarzschild background. In the case of dS{sub 4}, however, contrary to the finite temperature case, the gauge-field condensate plays an important role on the dynamical properties of quarks. We also give the quark-antiquark potential and meson spectra to find possible quark-bound states. We arrive at the conclusion that, while the quarks are not confined in the dS{sub 4}, we could find stable meson states at very small cosmological constant as expected in the present universe. However, there would be no hadrons at early universe as in the inflation era.
- OSTI ID:
- 20871487
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 74, Issue 12; Other Information: DOI: 10.1103/PhysRevD.74.124020; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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