Gauge theory in de Sitter space-time from a holographic model

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書誌事項

公開日
2006-12-20
権利情報
  • http://link.aps.org/licenses/aps-default-license
DOI
  • 10.1103/physrevd.74.124020
  • 10.48550/arxiv.hep-th/0609152
公開者
American Physical Society (APS)

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説明

Yang-Mills theory with flavor quarks in the dS${}_4$ is studied through the dual supergravity in the AdS${}_5\times S^5$ background with non-trivial 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${}_4$ are similar to the case of the finite temperature theory given by the 5d AdS-Schwarzschild background. In the case of dS${}_4$, 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. And we arrive at the conclusion that, while the quarks are not confined in the dS${}_4$, we could find stable meson states at very small cosmological constant as expected in the present universe. But there would be no hadrons at early universe as in the inflation era.

22 pages, 23 figures (.eps)

収録刊行物

  • Physical Review D

    Physical Review D 74 (12), 2006-12-20

    American Physical Society (APS)

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