The CMS High-Level Trigger

Journal Article · Thu Dec 17 04:00:00 EST 2009 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3293780· OSTI ID:21325615

Covarelli, R ^[1]

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1. CERN, Geneva 1211 (Switzerland)

At the startup of the LHC, the CMS data acquisition is expected to be able to sustain an event readout rate of up to 100 kHz from the Level-1 trigger. These events will be read into a large processor farm which will run the 'High-Level Trigger'(HLT) selection algorithms and will output a rate of about 150 Hz for permanent data storage. In this report HLT performances are shown for selections based on muons, electrons, photons, jets, missing transverse energy, {tau} leptons and b quarks: expected efficiencies, background rates and CPU time consumption are reported as well as relaxation criteria foreseen for a LHC startup instantaneous luminosity.

• OSTI ID: 21325615
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1182; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ALGORITHMS
B QUARKS
CERN LHC
DATA ACQUISITION
DATA ACQUISITION SYSTEMS
ELECTRONS
KHZ RANGE
MULTIPARTICLE SPECTROMETERS
MUONS
PARTICLE IDENTIFICATION
PHOTONS
READOUT SYSTEMS
STANDARD MODEL
TAU PARTICLES
TRANSVERSE ENERGY