The CMS trigger system

IV. High Pt Detector and Physics (cont.)


The CMS trigger system must reduce an input data rate from the LHC bunch-crossing frequency of 40 MHz to a rate which will be written to permanent storage. A detailed study has recently been made of the performance of this system. This paper presents key elements of the results obtained and gives details of a draft “trigger table” for the Level-1 Trigger and the High-Level Trigger selection at a “start-up” luminosity of 2× 1033 cm – 2s – 1. High efficiencies for most physics objects are attainable with a selection that remains inclusive and avoids detailed topological or other requirements on the event.


Input Data Data Rate Trigger System Permanent Storage Physic Object 

Copyright information

© Springer-Verlag, Società Italiana di Fisica 2004

Authors and Affiliations

  • C. Seez
    • 1
  1. 1.Imperial College of Science Technology and Medicine, London SW7UK

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