Speaker
Description
The muon system of the CMS detector at the CERN Large Hadron Collider (LHC) is crucial for muon trigger, reconstruction, and identification performance. From 2026, the LHC will undergo a major upgrade during a shutdown period, after which the High-Luminosity LHC (HL-LHC) phase will start. During this phase, proton-proton collisions are expected to be delivered at 5 to 7 times the nominal LHC instantaneous luminosity, with a number of overlapping collisions per bunch crossing reaching 200. The upgrade program foreseen for the muon system is fundamental for CMS to exploit the full HL-LHC physics potential, maintaining the reconstruction efficiency and improving the trigger capabilities while extending the detector acceptance into the high pseudorapidity region. The upgrade of the front-end and back-end electronics for the Drift Tubes (DT) and Cathode Strip Chambers (CSC), as well as back-end electronics for the Resistive Plate Chambers (RPC), is essential to operate under the unprecedented HL-LHC data-taking conditions. Moreover, the installation of two new muon sub-detectors is foreseen: the improved Resistive Plate Chambers (iRPC) and the Gas Electron Multipliers (GEM). This talk will give an overview of the current status, challenges, and test results, highlighting the readiness of the CMS muon system for the HL-LHC.
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