Jul 16 – 22, 2009
Kraków, Poland
Europe/Warsaw timezone

The MSSM with large tan(beta) beyond the decoupling limit

Jul 16, 2009, 5:45 PM
Large Lecture - Hall A (Kraków, Poland)

Large Lecture - Hall A

Kraków, Poland

The Auditorium Maximum of the Jagiellonian University 33 Krupnicza Street 31-123 Kraków
Flavour Physics II. Flavour Physics


Mr Lars Hofer (Karlsruhe Institut of Technology)


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)

Presentation materials