Mr
Martin Wolfgang Winkler
(TU München)
26/08/2010, 16:12
Astro
I perform a study of the DAMA annual modulation data in the context of inelastic dark matter. I find that inelastic dark matter with mass m > 15 GeV is excluded at high significance by the combination of DAMA spectral information and results from other direct detection experiments. However, at smaller m, inelastic dark matter constitutes a possible solution to the DAMA puzzle.
Mr
Florian Staub
(University Wuerzburg)
26/08/2010, 16:29
Astro
We reconsider the dark matter problem in supersymmetric models with gauge mediated supersymmetry breaking, with and without R-parity breaking. In these classes of models, a light gravitino forms the dark matter.Consistency with the experimental data, in particular the dark matter abundance and the small-scale power spectrum, requires additional entropy production after the decoupling of the...
Dr
Ju Min Kim
(University Bonn)
26/08/2010, 16:46
Astro
We compute one--loop corrections to the annihilation of
non--relativistic particles $\chi$ due to the exchange of a (gauge
or Higgs) boson $\varphi$ with mass $\mu$ in the initial state. In
the limit $m_\chi \gg \mu$ this leads to the ``Sommerfeld
enhancement'' of the annihilation cross section. However, here we
are interested in the case $\mu \lsim m_\chi$, where the...
Dr
Björn Herrmann
(DESY)
26/08/2010, 17:03
Astro
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...
Mr
Guillaume Chalons
(LAPTH)
26/08/2010, 17:20
Astro
We have computed the full one-loop corrections (electroweak as well as QCD) to processes
contributing to the relic density of dark matter in the MSSM where the LSP is the lightest
neutralino. We cover scenarios where the neutralino is a bino-higgsino one with mass around
500 GeV and an almost pure wino with a mass of order 2 TeV. In the wino case the radiative
corrections exhibit important...
Ms
Suchita Kulkarni
(Physics Institute, University of Bonn)
26/08/2010, 17:37
Astro
The lightest neutralino as a cold dark matter candidate has been widely studied. Generally, tree-level calculations of its (co-)annihilation cross sections are used to predict the relic density, which leads to constraints on the parameter space. It has been known that these cross sections can change by order 10% at one loop level. However, calculating these one loop corrections is...