The CMS high level trigger

CMS Collaboration;Adam, W.;Bruno, Giacomo;Delaere, Christophe;van der Aa, Olivier;et.al.
(2006) European Physical Journal C. Particles and Fields — Vol. 46, n° 3, p. 605-667 (2006)

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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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CMS Collaboration, Adam, W., Bruno, G., Delaere, C., Lemaitre, V., Ninane, A., van der Aa, O., & et al. (2006). The CMS high level trigger. European Physical Journal C. Particles and Fields, 46(3), 605-667. https://doi.org/10.1140/epjc/s2006-02495-8 (Original work published 2006)