The readiness of CMS for exotic physics at LHC

The Large Hadron Collider (LHC) at CERN is a 14 TeV proton-proton collider to be operational in 2009, permitting experiments to take data at a design luminosity of 10^34 cm^-2 sec^-1. With an enormous physics potential, the Compact Muon Solenoid (CMS) is one of the two general purpose detectors at LHC that will independently distinguish some of nature’s most interesting phenomena. This requires an efficient and precise detection of particles in the inner detectors of the experiment, namely the tracker and calorimeters contained in a solenoid magnet of 4T. The muon system is housed within the elements of the return yoke. At design luminosity, an unprecedented particle rate places stringent demands and technological challenges on the complete detector design and concept. The lead tungstate crystal electromagnetic calorimeter (ECAL,) hermetic and homogeneous is expected to reach excellent performances in order to guarantee the full CMS discovery potential of the Higgs boson (H->UpsilonUpsilon) for which a good energy resolution is crucial. The Hadron Calorimeter is designed to measure energy of hadron jets and single hadrons. Muons provide a clear signature for many of the interesting processes which will be studied at the LHC. The goal of the muon system is to provide identification, track reconstruction and trigger. To do this, the CMS muon system employs several detectors: Drift Tubes (DT), Cathode Strip Chambe rs (CSC) and Resistive Plate Chambers (RPC). In this paper, a short description and status of each subsystem of the CMS experiment will be presented.