MSSM vs. NMSSM in $ΔF=2$ transitions

Abstract

We study deviations between MSSM and NMSSM in the predictions of $ΔF=2$ processes. We found that there can be two sources which can cause such deviations, \emph{i.e}, due to certain neutralino-gluino cross box diagrams and due to well known double penguin diagrams. Both are effective at large $\tan β$. In addition to this, taking into account 8 TeV direct search constraints from the heavy Higgs searches, we study the maximum allowed MFV like new physics (NP) effects on $ΔM_s$ in the two models. In NMSSM such NP effects can be as large as $25 \%$, on the other hand in MSSM such large contributions are severely constrained.

5 pages, 3 figures, Talk given at the 9th International Workshop on the CKM Unitarity Triangle (CKM2016)