Erlangen 2026 – scientific programme
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T: Fachverband Teilchenphysik
T 5: Methods in Particle Physics I
T 5.8: Talk
Monday, March 16, 2026, 18:00–18:15, KH 00.020
Track Reconstruction with the Pixel Detector for the Phase-2 Upgrade of the CMS High-Level Trigger — •Jan Gerrit Schulz1,2, Alexander Schmidt1, Marco Rovere2, Elena Vernazza2, Bruno Alves2, Emanuele Coradin2,3, Luca Ferragina2,4, Marco Musich2, and Felice Pantaleo2 — 1III. Physikalisches Institut A, RWTH Aachen University, Germany — 2CERN, Switzerland — 3Università di Padova & INFN, Italy — 4Università di Bologna, Italy
The CMS detector will undergo an extensive upgrade for the upcoming High-Luminosity LHC, which will include the complete replacement of the inner tracking system. Event reconstruction algorithms must be adapted to the new geometry and the planned denser environment of up to 200 simultaneous proton-proton interactions. An important component of this event reconstruction in the High-Level Trigger (HLT) is pixel tracking, which forms the first step in the track reconstruction chain as well as a fast alternative for full tracking entirely. To exploit the full potential of the improved pixel detector, the CMS pixel tracking algorithm has been improved in various respects. This includes an extension of the coverage to parts of the outer tracker, an optimization of the parameters, and a new DNN-based track selection. This contribution provides an overview of these new developments.
Keywords: CMS; HLT; HL-LHC; Tracking