Flavour violating squark and gluino decays

TL;DR

This paper investigates how large flavour-violating entries in squark mass matrices influence both low energy observables and decay processes of squarks and gluinos, highlighting potential signals at future colliders.

Contribution

It analyzes the impact of second and third generation squark mixing on decay rates and constraints from B meson data, revealing significant decay possibilities despite strict low-energy bounds.

Findings

Flavour violating decays can reach about 10% of total decays.

Constraints from B meson data limit but do not eliminate large flavour violating decays.

Implications for collider searches and parameter determination are discussed.

Abstract

We consider scenarios with large flavour violating entries in the squark mass matrices focusing on the mixing between second and third generation squarks. These entries govern both, flavour violating low energy observables on the one hand and squark and gluino decays on the other hand. We first discuss the constraints on the parameter space due to the recent data on B mesons from the B factories and Tevatron. We then consider flavour violating squark and gluino decays and show that they can still be typically of order 10% despite the stringent constraints from low energy data. Finally we briefly comment on the impact for searches and parameter determinations at future collider experiments such as the upcoming LHC or a future International Linear Collider.