Marek Olechowski (Warsaw U.)
Supersymmetric SO(10) GUT model with negative $\mu$ is investigated. The present experimental constraints may be fulfilled in this model only when the soft masses of scalars and gauginos are non-universal. Appropriate non- universalities can be naturally present in SO(10) models. The tension between the experimental data on BR($b\to s\gamma$) and $(g-2)_\mu$ and the recent limits from LHC is investigated. It is shown that all the constraints may be satisfied simultaneously. The relic abundance of the LSP in the preferred part of the parameter space may be consistent with the WMAP data. The sparticle spectrum in the considered model is relatively light and may be explored by the LHC experiments (in contrast to SO(10) models with positive $\mu$).
Arnold Sommerfeld Center