CP3-Origins/DESY/Göttingen Autumn School on Particle Physics and Cosmology

Session

Student's Session

12 Oct 2011, 17:10

Seminar Room 2, Building 2a (DESY)

23. A sufficient condition for de Sitter vacua in type IIB string theory

Mr Markus Rummel (University of Hamburg)

12/10/2011, 17:10

We derive a sufficient condition for realizing meta-stable de Sitter vacua with small positive cosmological constant within type IIB string theory flux compactifications with spontaneously broken supersymmetry. There are a number of `lamp post' constructions of de Sitter vacua in type IIB string theory and supergravity. We show that one of them -- the method of `K\"ahler uplifting' by F-terms...

22. A Dark Matter Candidate from Inert Doublet Models

Mr Mahdi Poormohammadi (University of Bergen)

12/10/2011, 17:30

In spite of the fact that the existence of dark matter in the Universe is established, its nature remains unknown. Our aim is to provide a model which offers a candidate for dark matter and simultaneously tries to address some potential problems like CP-violation. The model is an extension of 2HDM with an additional inert doublet along with an unbroken symmetry. The unbroken Z2 symmetry...

0. Matter and Dark Matter from heavy Majorana Neutrino Decay

Ms Valerie Domcke (DESY)

12/10/2011, 17:50

The decays of heavy Majorana neutrinos and their superpartners shortly after inflation simultaneously give rise to three crucial ingredients for the hot early universe: (1) the entropy inherent to the thermal radiation that dominates the overall energy density, (2) the matter-antimatter asymmetry and (3) dark matter. For characteristic neutrino parameters baryogenesis can be accomplished by...