2011/12/31 by Fedor Bezrukov, Phongpichit Channuie, Jakob Jark Joergensen +1 · 1 citation
Economics, Econometrics and Finance · Physics and Astronomy · #Black Holes and Theoretical Physics #Composite material #Composite number #Cosmology and Gravitation Theories #Economics #Geology #Glueball #Inflation (cosmology) #Materials science #Particle physics #Physics #Stochastic processes and financial applications #Theoretical physics #gr-qc #hep-ph #hep-th
paper · pdf · doi:10.1103/physrevd.86.063513
16 pages, RevTeX. 2 new sessions have been added, one on graviton scattering and the other on the relevant energy scales of the theory. References added. Main results are unchanged. Version to match the one to appear in Phys.Rev. D
arxiv created 2012/08/27 · arxiv updated 2013/05/29
We explore the paradigm in which inflation is driven by a four-dimensional strongly coupled dynamic with a nonminimal coupling to gravity. We introduce a model where the inflaton is identified with the glueball field of a pure Yang-Mills theory. We introduce the dilatonic-like glueball action, which is obtained by requiring saturation of the underlying Yang-Mills trace anomaly at the effective action level. We couple the resulting action nonminimally to gravity. We demonstrate that it is possible to achieve successful inflation with the confining scale of the underlying Yang-Mills theory naturally of the order of the grand unified energy scale. We also argue that the metric formulation gives a more consistent picture for models of composite inflation than the Palatini one. Finally, we show that, within the metric formulation, the model nicely respects tree-level unitarity for the scattering of the inflaton field all the way to the Planck scale.