• Jul 22 2014

    NITheP WITS node seminar: Nicolas Deutschmann (Institut de Physique Nucleaire de Lyon, France)

    The National Institute for Theoretical Physics, and the Centre for Theoretical Physics, School of Physics, would like to invite to its coming talk in the theoretical physics seminar series, entitled:

    "Curved extra-dimensions"

    to be presented by Nicolas Deutschmann (Institut de Physique Nucleaire de Lyon, France)

    Abstract: Universal Extra-Dimension models provide a promising framework for model building as they naturally have rich phenomenological implications, not the least of which is a potential natural dark matter candidate. This candidate takes the form of a Kaluza-Klein excitation of some neutral Standard Model field whose stability is ensured by some isometry of the extra-space. In five dimensions, such a symmetry has to be enforced in an ad-hoc fashion, which is why six-dimensional models have started prompting the interest of model builders. If flat 6D models have been thoroughly surveyed and studied, the realm of curved extra-dimensional models remains mostly uncharted. This talk aims at showing the features of extra dimensional models on a curved background, focusing mostly on positively curved spaces. I will show that the main difficulty for constructing a convincing model revolves around the issue of chiral fermions in the 4D effective theory and how it can be overcome by the addition of a new gauge field which has to be hidden from experimental reach by a symmetry breaking. After going over the phenomenological consequences of a model built using these ingredients, I will briefly review hyperbolic extra-dimensions, for which several problems appearing on positively curved spaces are solved or alleviated.

    Dates: Tuesday, 22nd July 2014
    Venue: Frank Nabarro Lecture Theatre P216
    Time: 13.20 - 14.10

    For more information, please contact:

    Alan S. Cornell

    School of Physics
    University of the Witwatersrand
    Private Bag 3
    Wits 2050
    South Africa