Performance of the CMS Level-1 Trigger during Commissioning with Cosmic Ray Muons

Abstract

The CMS Level-1 trigger was used to select cosmic ray muons and LHC beam events during data-taking runs in 2008, and to estimate the level of detector noise. This paper describes the trigger components used, the algorithms that were executed, and the trigger synchronisation. Using data from extended cosmic ray runs, the muon, electron/photon, and jet triggers have been validated, and their performance evaluated. Efficiencies were found to be high, resolutions were found to be good, and rates as expected.

References in corpus (5)

• Performance and Operation of the CMS Electromagnetic Calorimeter
• Time Reconstruction and Performance of the CMS Electromagnetic Calorimeter
• Alignment of the CMS Muon System with Cosmic-Ray and Beam-Halo Muons
• Performance of the CMS Drift-Tube Local Trigger with Cosmic Rays
• A 3-D Track-Finding Processor for the CMS Level-1 Muon Trigger

Cited by in corpus (12)

• Performance and Operation of the CMS Electromagnetic Calorimeter
• Performance of CMS Muon Reconstruction in Cosmic-Ray Events
• Multi-Boson Interactions at the LHC
• Commissioning of the CMS Experiment and the Cosmic Run at Four Tesla
• Measurement of the charge ratio of atmospheric muons with the CMS detector
• Commissioning and Performance of the CMS Silicon Strip Tracker with Cosmic Ray Muons
• Performance of the CMS Cathode Strip Chambers with Cosmic Rays
• Performance of CMS Hadron Calorimeter Timing and Synchronization using Test Beam, Cosmic Ray, and LHC Beam Data
• Performance of the CMS Drift-Tube Local Trigger with Cosmic Rays
• Fine Synchronization of the CMS Muon Drift-Tube Local Trigger using Cosmic Rays
• Search for contact interactions using the inclusive jet pT spectrum in pp collisions at sqrt(s) = 7 TeV
• Commissioning of the CMS High-Level Trigger with Cosmic Rays