Speaker
Mr
Momchil Davidkov
(Institute for Theoretical Particle Physics, Karlsruhe Institute of Technology)
Description
In the light of recent experimental anomalies indicating a non-zero
Bs-Bs-bar mixing phase I present a fresh look at meson-antimeson mixing in
the MSSM. I present a new analysis of the up-type and down-type squark
mass matrices with focus on constraints on the mass splittings among the
first two generations of left-handed squarks. If the gluino is heavier
than the squarks, the conventionally studied squark-gluino box
contributions are small and can even vanish. This has two important
consequences: First, the mass splittings between squarks of different
generations can become large because of a suppressed super-GIM mechanism.
Second, the SU(2) symmetry linking the chargino contributions in Bd
mixing and Bs mixing leads to correlations between both meson-antimeson
systems. I exemplify this correlation in a detailed numerical study
(which also includes b->s gamma and Kaon CP violation) for
a scenario with flavour-changing left-left elements of the squark mass
matrix. I further have a critical look at D mixing.
Primary author
Mr
Momchil Davidkov
(Institute for Theoretical Particle Physics, Karlsruhe Institute of Technology)
Co-authors
Mr
Andreas Crivellin
(Institute for Theoretical Particle Physics, Karlsruhe Institute of Technology)
Prof.
Ulrich Nierste
(Institute for Theoretical Particle Physics, Karlsruhe Institute of Technology)
