Jul 20 – 27, 2011
Alpes Congrès - Alpexpo
Europe/Paris timezone

Flavor Physics in an SO(10) Grand Unified Model

Jul 22, 2011, 5:35 PM
les Ecrins 3 (Alpes Congrès - Alpexpo)

les Ecrins 3

Alpes Congrès - Alpexpo

Parallel session talk Flavour Physics and Fundamental Symmetries Flavour Physics and Fundamental Symmetries


Dr Jennifer Girrbach (TU Munich)


In a supersymmetric grand-unified model proposed by Chang, Masiero and Murayama the atmospheric neutrino mixing angle induces large new b --> s transitions. Relating the supersymmetric low-energy parameters to seven new parameters a_0, m_0^2, m_{\tilde g}, D, xi, tan(beta) and arg(mu) of this SO(10) GUT model, we perform a correlated study of several FCNC processes. The LEP limit on the lightest Higgs boson mass implies an important lower bound on tan(beta), which in turn limits the size of the new FCNC transitions. Remarkably, the combined analysis does not rule out large effects in B_s-\bar{B_s} mixing and we can easily accommodate the large CP phase in the B_s-\bar{B_s} system which has recently been inferred from a global analysis of CDF and D0 data. The model predicts a particle spectrum which is different from the popular CMSSM. BR(tau --> mu gamma) enforces heavy masses, typically above 1 TeV, for the sfermions of the degenerate first two generations. However, the ratio of the third-generation and first-generation sfermion masses is smaller than in the CMSSM and a (dominantly right-handed) stop with mass below 500 GeV is possible.

Primary author

Dr Jennifer Girrbach (TU Munich)


Prof. Ulrich Nierste (KIT)

Presentation materials