Sascha Caron

Track reconstruction at the High-Luminosity LHC usually keeps only charged particles above a transverse-momentum threshold, and that cut discards more than ninety percent of the particles. AlphaHits-TrackFormer instead processes all pixel and strip hits in complete TrackML events without a transverse-momentum selection on target tracks, reaching a TrackML score of 0.959 on 820 test events. The same framework, pretrained on tracking and then jointly fine-tuned, uses a shared hit-level representation to output tracks, jets, jet flavour and event-level observables together, with a Higgs classification AUC of 0.944.

Track reconstruction at the High-Luminosity LHC usually keeps only charged particles above a transverse-momentum threshold, and that cut discards more than ninety percent of the particles. AlphaHits-TrackFormer instead processes all pixel and strip hits in complete TrackML events without a transverse-momentum selection on target tracks, reaching a TrackML score of 0.959 on 820 test events. The same framework, pretrained on tracking and then jointly fine-tuned, uses a shared hit-level representation to output tracks, jets, jet flavour and event-level observables together, with a Higgs classification AUC of 0.944.