Cosmic Muon Analysis with the CMS detector
Presented by Chang LIU on 28 Jul 2009 from 17:45 to 18:10
Session: First Results from LHC
Track: First Results from LHC
Despite of the delay of physics collisions at the Large Hadron Collider (LHC), induced by the incidence in September 2008, the CMS collaboration is utilizing the commissioned detector to take large amounts of cosmic data. About 300 million cosmic events were recorded with the full detector and a magnetic field of 3.8~T turned on. The effort has provided significant statistics to study the detector performance and analyze the physics of cosmic rays. We present recent results from the cosmic muon analysis activities that were conducted using real cosmic data and dedicated cosmic Monte Carlo samples. Measurements of the cosmic muon charge ratio and the flux measurement were performed and have demonstrated the expected performance of the capability of the CMS detector to do real physics analysis. The cosmic muon analysis effort is not only a dress rehearsal for the physics analysis at the LHC, but also the first physics results of the CMS experiment and provides interesting links to astrophysics.