Scenarios of Gravitino Dark Matter and their Cosmological and Particle Physics Implications

I report on some scenarios where the gravitino is the dark matter and the supersymmetry breaking mediated by a gauge sector.Comment: 11 pages, 4 figures, To appear in the proceedings of Seventh International Heidelberg Conference on Dark Matter in Astro and Particle Physics (DARK 2009), Christchurch, New Zealand, 18-24 Jan 200

Non-trivial extension of the Poincar\'e algebra for antisymmetric gauge fields

We investigate a non-trivial extension of the $D-$dimensional Poincar\'e algebra. Matrix representations are obtained. The bosonic multiplets contain antisymmetric tensor fields. It turns out that this symmetry acts in a natural geometric way on these $p-$forms. Some field theoretical aspects of this symmetry are studied and invariant Lagrangians are explicitly given.Comment: LaTeX, 13 pages, contribution to the XI-th International Conference Symmetry Methods in Physics, Prague, June 21-24, 2004, presented by M. Rausch de Traubenber