Abstract
The calorimeter and muon systems are essential components to provide a trigger for the LHCb experiment. The calorimeter system comprises a Scintillating Pad Detector and Pre-Shower, followed by electromagnetic and hadronic calorimeters. The calorimeter system allows photons, electrons and hadrons to be identified, and their energy to be measured. The muon system consists of five measuring stations equipped with Multi-Wire Proportional Chambers (MWPCs) and triple-Gas Electron Multiplier (GEM) detectors, separated by iron filters. It allows the muons identification and transverse momentum measurement. The status of the two systems and their expected performance is presented.
Highlights
The LHCb experiment is dedicated to the study of the decays of beauty hadrons produced at the LHC
A key role in the trigger is played by the Level-0 (L0) hardware step that reduces the event rate from 40MHz to 1MHz using the input from the VELO[2] detector, the calorimeter
The CALO system[3] is made of a Scintillating Pad Detector (SPD), followed by a Pre-Shower (PS) in front of the Electromagnetic CALorimeter (ECAL) and the Hadronic CALorimeter (HCAL)
Summary
The LHCb experiment is dedicated to the study of the decays of beauty hadrons produced at the LHC. Precision measurements of CP violation and rare decays in the B meson systems, which are the main LHCb goals, can be achieved only with a very well designed and efficient trigger[1]. A key role in the trigger is played by the Level-0 (L0) hardware step that reduces the event rate from 40MHz to 1MHz using the input from the VELO[2] detector, the calorimeter
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