Speaker
Mr
Lars Hofer
(Karlsruhe Institut of Technology)
Description
If the parameter tan beta of the MSSM is large, enhanced loop corrections
must be resummed to all orders in perturbation theory. We perform this
resummation for flavour-diagonal and flavour-violating tan-beta-enhanced
corrections without resorting to the decoupling limit, in which the MSSM
is reduced to an effective 2HDM. Our results enable us to clarify the
dependence of the resummed expressions on the renormalization scheme and to cover two new classes of processes with supersymmetric particles, which are both intractable with the conventional effective-2HDM method: The
first class are collider processes with external supersymmetric particles;
the second class are loop processes which vanish in the decoupling limit
of supersymmetry. Applying the resummation formulae to FCNC processes in B physics, we find an interesting new effect in observables in which the
chromomagnetic effective operator is important.
Primary authors
Mr
Dominik Scherer
(Karlsruhe Institut of Technology)
Mr
Lars Hofer
(Karlsruhe Institut of Technology)
Prof.
Ulrich Nierste
(Karlsruhe Institut of Technology)
