Orateur
Prof.
Ulrich Nierste
(TTP, Karlsruhe Institute of Technology)
Description
The 2010 data on quark flavour physics reveal a considerable tension
with the Standard Model. However, an excellent fit is found if one
permits new physics in the amplitudes describing meson-antimeson mixing
in the B_d and B_s systems. The corresponding global analysis disfavours
the Standard Model at the level of 3.6 standard deviations and calls for
new sources of CP violation in the B-Bbar mixing amplitudes. An
interpretation within the Minimal Supersymmetric Standard Model (MSSM)
must go beyond the popular assumption of Minimal Flavour Violation
(MFV). Grand unified theories can provide additional sources of quark
flavour violation which are governed by the lepton mixing matrix. I
present the results of a global analysis of an SO(10) GUT model, which
accommodates a large CP phase in B_s - B_s-bar mixing while being
consistent with other constraints. I discuss the correlations between
quark and lepton flavour physics and the sparticle spectrum which arise
from the GUT boundary conditions.
Author
Prof.
Ulrich Nierste
(TTP, Karlsruhe Institute of Technology)
