出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：Precise tracking information in the online selection of interesting physics events is extremely
beneficial at hadron colliders. The CDF experiment at the Tevatron, has shown for the first time
the impact of the tracking in triggers, allowing to achieve unprecedented precision in B-physics
measurements. The CMS experiment at LHC will largely make use of tracking information at
high level trigger, after the Level-1 acceptance. The increased luminosity of the Super-LHC
collider will impose to CMS a drastic revision of the Level-1 trigger strategy, incorporating the
tracker information at the first stage of the selection. After a review of the CDF and CMS
approaches we will discuss several possible Level-1 tracker based concepts for the upgraded
CMS detector at Super-LHC. One approach is based on associative memories, which has
already been demonstrated in CDF. It makes use of binary readout in the front end electronics,
followed by transfer of the full granularity data off detector using optical links to dedicated
processors which reconstruct tracks.
