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    Please use this identifier to cite or link to this item: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/72723


    Title: Cosmological constant from gauge fields on extra dimensions
    Authors: Cho, Hing-Tong;Ho, Choon-Lin;Ng, Kin-Wang
    Contributors: 淡江大學物理學系
    Keywords: High Energy Physics - Phenomenology (hep-ph);Astrophysics (astro-ph)
    Date: 2006-12
    Issue Date: 2013-07-09 15:10:49 (UTC+8)
    Publisher: Amsterdam: Elsevier BV * North-Holland
    Abstract: We present a new model of dark energy which could explain the observed accelerated expansion of our Universe. We show that a five-dimensional Einstein-Yang-Mills theory defined in a flat Friedmann-Robertson-Walker universe compactified on a circle possesses degenerate vacua in four dimensions. The present Universe could be trapped in one of these degenerate vacua. With the natural requirement that the size of the extra dimension could be of the GUT scale or smaller, the energy density difference between the degenerate vacua and the true ground state can provide us with just the right amount of dark energy to account for the observed expansion rate of our Universe.
    Relation: Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics 643(2), pp.71-75
    DOI: 10.1016/j.physletb.2006.10.042
    Appears in Collections:[物理學系暨研究所] 期刊論文

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