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SUSY07

25 July 2007 to 1 August 2007
Karlsruhe University
Europe/Zurich timezone

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Session

Cosmology 6

Cos6
28 Jul 2007, 16:30
Physics Building (Karlsruhe University)

Physics Building

Karlsruhe University

Wolfgang-Gaede-Str. 1 76131 Karlsruhe Germany

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  1. 71. RH Sneutrino Condensate CDM and the Baryon-to-Dark Matter Ratio
    Dr John McDonald (Lancaster University)
    28/07/2007, 16:30
    Cosmology and Astrophysics
    Parallel Talk
    The similarity of the observed densities of baryons and CDM suggest that they have a common or related origin. This can be understood in the context of the MSSM with RH sneutrinos if CDM is due to a d=4 flat direction condensate of very weakly coupled RH sneutrino LSPs and the baryon asymmetry is generated by d = 4 (H_{u}L)^2 Affleck-Dine leptogenesis. An observable CDM isocurvature...
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  2. 123. Unification and Dark Matter in a Minimal Scalar Extension of the Standard Model
    Ms Mariangela Lisanti (SLAC, Stanford University)
    28/07/2007, 16:50
    Cosmology and Astrophysics
    Parallel Talk
    The six Higgs doublet model is a minimal extension of the Standard Model (SM) that addresses dark matter and gauge coupling unification. Another Higgs doublet in the 5 representation of a discrete symmetry group, such as S_6, is added to the SM. The lightest components of the 5-Higgs are neutral, stable and serve as dark matter so long as the discrete symmetry is not broken. ...
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  3. 199. Stability and Leptogenesis in the left-right symmetric SeeSaw mechanism
    Mr Tomas Hällgren (Royal Institute of Technology (KTH), Department of theoretical physics)
    28/07/2007, 17:10
    Cosmology and Astrophysics
    Parallel Talk
    It has previously been shown that in left-right symmetric type I+II seesaw mechanism, an eight-fold degeneracy among the mass matrices of the heavy right handedneutrinos M_R exist. We discriminate among the degenerate solutions, using stability properties of the solutions and their ability to lead to successful baryogenesis via leptogenesis as criteria. Thus, we can partially lift the...
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  4. 316. Dark matter from brane oscillations
    Prof. Tonnis ter Veldhuis (Macalester College)
    28/07/2007, 17:30
    Cosmology and Astrophysics
    Parallel Talk
    If the Standard Model is confined to a brane that spontaneously breaks some of the space-time symmetries of the embedding space, then additional massive vector fields must be included. According to the low energy, four dimensional effective theory describing this scenario, these vector fields couple to the energy momentum tensor of the Standard Model. As the additional vector fields can...
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