| CMS Note | |
| Report number | CMS-CR-2024-282 |
| Title | Level-1 Tracking at CMS for the HL-LHC |
| Author(s) | Mark Steven Larson |
| Publication | 2024 |
| Collaboration | CMS Collaboration |
| Imprint | 26 Oct 2024 |
| Number of pages | 7 |
| Presented at | 12th Edition of the Large Hadron Collider Physics Conference (LHCP2024), Boston, United States, 3 - 7 Jun 2024 |
| Subject category | Detectors and Experimental Techniques |
| Accelerator/Facility, Experiment | CERN LHC ; CMS |
| Keywords | Tracker |
| Abstract | The success of the CMS physics program at the HL-LHC requires maintaining sufficiently low trigger thresholds to select physics processes. With an average expected 200 pileup interactions, it is critical to achieve this while maintaining manageable trigger rates by including tracking information in the Level-1 (L1) trigger. A 40\,MHz silicon-based track trigger on the scale of the CMS central tracking system has never been built and can enable entirely new physics studies. The main challenges of reconstructing tracks in the L1 trigger are the large data throughput at 40\,MHz and the need for a trigger decision within 12.5\,s. To address these challenges, the CMS Outer Tracker for the HL-LHC uses modules with closely spaced silicon sensors to read out only hits compatible with charged particles above 2\,GeV. This contribution will discuss the L1 tracking algorithm and its implementation, present simulation studies of the estimated performance, and show results from hardware studies at the CERN Tracker Integration Facility. |
Record created 2024-11-11, last modified 2025-01-29
