Abstract
The upgrade of the LHC machine is planned to deliver luminosities 5 to 10 times larger than the design one of 1 × 1034 cm−2s−1. A novel tracking system for the CMS experimentmust be designed and built. One main aspect of the current activitiesconsists in understanding the capabilities that different designs sucha tracker would have to provide for the Level 1 hardware trigger tocomplement the muon and calorimeter information. Data rate reductionat hardware level consists in both reducing multiple hits from asingle track and rejection of low pt tracks. Pattern-basedhit correlation of properly built clusters of hits would providequality Level 1 primitives to the hardware trigger. These can becombined together in a projective geometry to perform a rough trackingto be implemented online, returning rough pt, direction, andvertex information for a candidate track. The benchmark results fromsimulations within the official CMS framework are presented for oneparticular layout based on barrel trigger layers, emphasizing theflexibility of this tool for the design and test of different trackingstrategies at level 1 to be compared with the developments in triggerarchitectures implementation.
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