Strangeness tracking in the upgraded ALICE detectors: study of $\Xi_b^- \to (\Xi_c^0 \to \Xi^- \pi^+) \pi^-$

With the recent upgrades of the ALICE (A Large Ion Collider Experiment) detectors and especially the one of the ITS (Inner Tracking System), the first detection layers are closer to the primary vertex (the collision point). This is a huge improvement in secondary vertex reconstruction which is important for short-lived heavy-flavour hadrons like $\Xi_b^-$ for instance, which is at the heart of this study via a specific decay channel: $\Xi_b^- \to (\Xi_c^0 \to \Xi^- \pi^+) \pi^-$. The desire is to create an analysis prototype using a state-of-the-art detector and a brand new technique called strangeness tracking. The idea of strangeness tracking is to find signatures of weakly decaying hyperons (such as $\Xi^-$) or hypertritons before they decay, using silicon detectors that are very close to the primary vertex in order to feed the tracking algorithm with these direct measurements that shall act as corrections and improve the resolution. This shall allow us to get unprecedented precision in measuring these particles during Run 3 of the LHC and beyond.