The CMS High Level Trigger

Details The CMS High Level Trigger The CMS High Level Trigger

2005-12-31

arxiv.org/abs/hep-ex/0512077v1

Eur.Phys.J.C46:605-667,2006

Physics

High Energy Physics

High Energy Physics - Experiment

accepted by EPJ Nov 2005

Scientific paper

10.1140/epjc/s2006-02495-8

At the Large Hadron Collider at CERN the proton bunches cross at a rate of 40MHz. At the Compact Muon Solenoid experiment the original collision rate is reduced by a factor of O (1000) using a Level-1 hardware trigger. A subsequent factor of O(1000) data reduction is obtained by a software-implemented High Level Trigger (HLT) selection that is executed on a multi-processor farm. In this review we present in detail prototype CMS HLT physics selection algorithms, expected trigger rates and trigger performance in terms of both physics efficiency and timing.

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