Abstract
Abstract We report a study of the Resistive Plate Chambers (RPC) Level-1 (L1) trigger system efficiency in the Barrel of the Compact Muon Solenoid (CMS) detector of LHC in the same region covered also by the DT trigger system. The method used to study the efficiency exploits the independency of the CMS Drift Tube (DT) and RPC trigger systems. Muon tracks in the event are triggered and reconstructed using the Drift Tube subsystem only, and for each of them we search for a compatible RPC L1 trigger object. We discuss in detail the method and the results of the performance obtained with cosmic ray data taken in 2008–2009.
Highlights
The Compact Muon Solenoid (CMS) Muon System [1][2] has been designed to provide excellent muon identification, triggering and precise momentum reconstruction over the entire kinematic range foreseen at the Large Hadron Collider (LHC)
We report on a study of the Resistive Plate Chambers (RPC) Level 1 Trigger system efficiency in the Barrel of the Compact Muon Solenoid (CMS) detector at the Large Hadron Collider
The Barrel and Endcap regions overlap in the pseudorapidity range 0.8 < |η| < 1.04 A crucial feature of the Muon System is the redundancy provided by the combination of Drift Tube (DT) and Resistive Plate Chamber (RPC) independent sub-systems in the Barrel region, and Cathode Strip Chambers (CSC) and RPC sub-system in the Endcap region
Summary
The Compact Muon Solenoid (CMS) Muon System [1][2] has been designed to provide excellent muon identification, triggering and precise momentum reconstruction over the entire kinematic range foreseen at the Large Hadron Collider (LHC). The Barrel and Endcap regions overlap in the pseudorapidity range 0.8 < |η| < 1.04 A crucial feature of the Muon System is the redundancy provided by the combination of Drift Tube (DT) and Resistive Plate Chamber (RPC) independent sub-systems in the Barrel region , and Cathode Strip Chambers (CSC) and RPC sub-system in the Endcap region. We exploited the independence of the DT and RPC systems to develop a method for the measurement of the Barrel RPC L1 trigger efficiency.
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