Exploring the flavour structure of the high-scale MSSM

Abstract

We analyse the sensitivity of quark flavour-changing observables to the MSSM, in a regime of heavy superpartner masses. 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 $\Delta M_{s,d}$, ${\epsilon }_K$, ${\epsilon }_K^{\prime }/{\epsilon }_K$, $\mathcal{B}(K\to \pi \nu \bar{\nu })$, and the phase of $D$--$\bar{D}$ mixing, could play a very important role in charactering these frameworks in a regime of superpartner masses up to $\mathcal{O}(100)$~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.

arXiv comment15 pages, 6 figures

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