
Abstract 
Scintillatingfibre detectors are highefficiency, fast readout tracking devices employed through highenergy particle physics, for instance the SciFi tracker in the LHCb upgrade. The hybrid seeding is a standalone track reconstruction algorithm for the SciFi. This algorithm is designed in an iterative way, where tracks with a higher momentum, which are easier, are treated in priority. With the addition of topological information and knowledge of an effective track model, this algorithm is able to deal with hit inefficiency and the tight computing constraints of the upgrade, while delivering consistently high reconstruction efficiencies across a large spectrum of tracks corresponding to the diverse physics programme of the experiment. This programme can be extended in intriguing ways by the study of verydisplaced decay vertices, corresponding to darkmatter candidates or weakly decaying particles, and which can only be studied using such standalone algorithm.
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