Dynamical compactification and inflation in Einstein-Yang-Mills theory with higher derivative coupling

Hironobu Kihara, Muneto Nitta, Misao Sasaki, Chul Moon Yoo, Ignacio Zaballa

研究成果: Article査読

9 被引用数 (Scopus)

抄録

We study cosmology of the Einstein-Yang-Mills theory in ten dimensions with a quartic term in the Yang-Mills field strength. We obtain analytically a class of cosmological solutions in which the extra dimensions are static and the scale factor of the four-dimensional Friedmann-Lemaitre-Robertson-Walker metric is an exponential function of time. This means that the model can explain inflation. Then we look for solutions that describe dynamical compactification of the extra dimensions. The effective cosmological constant λ1 in the four-dimensional universe is determined from the gravitational coupling, ten-dimensional cosmological constant, gauge coupling, and higher derivative coupling. By numerical integration, the solution with λ1=0 is found to behave as a matter-dominated universe which asymptotically approaches flat space-time, while the solution with a nonvanishing λ1 approaches de Sitter space-time in the asymptotic future.

本文言語English
論文番号066004
ジャーナルPhysical Review D - Particles, Fields, Gravitation and Cosmology
80
6
DOI
出版ステータスPublished - 2009 9 8

ASJC Scopus subject areas

  • 核物理学および高エネルギー物理学
  • 物理学および天文学(その他)

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