Exploring the flavour structure of the high-scale MSSM

Abstract

AbstractWe analyse the sensitivity of quark flavour-changing observables to the MSSM, in a regime of heavy superpartners. We analyse four distinct and motivated frameworks characterising the structure of the soft-breaking terms by means of approximate flavour symmetries. We show that a set of six low-energy observables with realistic chances of improvement in the near future, namely $$\Delta M_{s,d}$$ΔMs,d, $$\epsilon _K$$ϵK, $$\epsilon _K'/\epsilon _K$$ϵK′/ϵK, $$\mathcal {B} (K\rightarrow \pi \nu {{\bar{\nu }}})$$B(K→πνν¯), and the phase of D–$${\bar{D}}$$D¯ mixing, could play a very important role in characterising these frameworks for superpartner masses up to $$\mathcal {O}(100)$$O(100) TeV. We show that these observables remain very interesting even in a long-term perspective, i.e. even taking into account the direct mass reach of the most ambitious future high-energy colliders.