Björn Herrmann (DESY Hamburg)
7/30/10, 1:40 PM
The possibility to compute the relic density of the dark matter candidate is an interesting possibility to constrain the parameter space of supersymmetric models and to obtain complementary information with respect to collider searches and precision measurements. On the particle physics side of this calculation, the main uncertainty is due to the annihilation cross-section of the dark matter...
Christopher Savage (Stockholm University (OKC))
7/30/10, 2:00 PM
The determination of dark matter constraints from liquid Xenon experiments depends upon the amount of scintillation light produced by nuclear recoils in the detector, a quantity that is characterized by the scintillation efficiency factor L_eff. I will examine how uncertainties in the measurements of L_eff and the extrapolated behavior of L_eff at low recoil energies (where measurements do...
Dr Mohamed Chabab (LPHEA, Cadi Ayyad university)
7/30/10, 2:20 PM
Dark Matter Candidates
By using a (string inspired) low energy effective field theory with a massive dilaton and a coupling function to gauge fields to model quark confinement, we show that the experimental data of charmonium and bottomonium is fitted when the dilaton mass is given a value about 57 MeV. Our estimate lies in the range proposed by other works which present the dilaton as a dark matter candidate.
Dr Michel Tytgat (ULB - Université Libre de Bruxelles)
7/30/10, 2:40 PM
If dark matter (DM) simply consists in a scalar particle interacting dominantly with the Higgs boson, the ratio of its annihilation cross section ---which is relevant both for the relic abundance and indirect detection--- and its spin-independent scattering cross section on nuclei depends only on the DM mass. It is an intriguing result that, fixing the mass and direct detection rate to fit the...