The CMS experiment at the CERN Large Hadron Collider (LHC) is a large particle detector designed to study proton-proton and lead-lead collisions at a center-of-mass energy of 14 TeV (5.5 TeV per nucleon-nucleon) and high luminosities up to 10^34 cm^-2 s^-1. The detector consists of a superconducting solenoid with a high magnetic field and large bore, surrounded by a silicon pixel and strip tracker, a lead-tungstate scintillating crystal electromagnetic calorimeter, and a brass-scintillator sampling hadron calorimeter. The detector also includes four stations of muon detectors covering most of the 4π solid angle, and forward sampling calorimeters extending the pseudorapidity coverage to high values (|η| ≤ 5), ensuring good hermeticity. The overall dimensions of the CMS detector are a length of 21.6 meters, a diameter of 14.6 meters, and a total weight of 12,500 tons. The detector is part of a larger collaboration involving researchers from around the world, including institutions in Europe, Asia, and the Americas. The CMS experiment is designed to study a wide range of particle physics phenomena, including the search for the Higgs boson and other new particles. The detector is equipped with a variety of sub-detectors, including tracking systems, calorimeters, and muon detectors, which work together to measure the properties of particles produced in collisions. The CMS experiment is an important part of the LHC program, which aims to explore the fundamental nature of matter and the universe.The CMS experiment at the CERN Large Hadron Collider (LHC) is a large particle detector designed to study proton-proton and lead-lead collisions at a center-of-mass energy of 14 TeV (5.5 TeV per nucleon-nucleon) and high luminosities up to 10^34 cm^-2 s^-1. The detector consists of a superconducting solenoid with a high magnetic field and large bore, surrounded by a silicon pixel and strip tracker, a lead-tungstate scintillating crystal electromagnetic calorimeter, and a brass-scintillator sampling hadron calorimeter. The detector also includes four stations of muon detectors covering most of the 4π solid angle, and forward sampling calorimeters extending the pseudorapidity coverage to high values (|η| ≤ 5), ensuring good hermeticity. The overall dimensions of the CMS detector are a length of 21.6 meters, a diameter of 14.6 meters, and a total weight of 12,500 tons. The detector is part of a larger collaboration involving researchers from around the world, including institutions in Europe, Asia, and the Americas. The CMS experiment is designed to study a wide range of particle physics phenomena, including the search for the Higgs boson and other new particles. The detector is equipped with a variety of sub-detectors, including tracking systems, calorimeters, and muon detectors, which work together to measure the properties of particles produced in collisions. The CMS experiment is an important part of the LHC program, which aims to explore the fundamental nature of matter and the universe.