@article{3074891,
    title = "Graviton production from extra dimensions",
    author = "Kunze, K.E.",
    journal = "Physical Review D: Particles Fields Gravitation and Cosmology",
    year = "2002",
    volume = "66",
    number = "10",
    issn = "1550-7998, 1550-2368",
    doi = "10.1103/PhysRevD.66.104005",
    keywords = "article;  astronomy;  calculation;  cosmic radiation;  cosmos;  gravity;  model;  spectrum;  temperature;  theory",
    abstract = "Graviton production due to collapsing extra dimensions is studied. The momenta lying in the extra dimensions are taken into account. A D-dimensional background is matched to an effectively four-dimensional standard radiation-dominated universe. Using observational constraints on the present gravitational wave spectrum, a bound on the maximal temperature at the beginning of the radiation era is derived. This expression depends on the number of extra dimensions, as well as on the D-dimensional Planck mass. Furthermore, it is found that the extra dimensions have to be large. © 2002 The American Physical Society."
}