A Study of tt¯ system in Muon+Jets channel at √s = 7 TeV at CMS

The top quark was discovered by the CDF and DØ experiments at Fermilab in 1995. It is the weak isospin doublet of bottom quark and the most massive of known elementary particles. The top quark produced primarily by the strong interaction but can only decay through the weak force. Top quark is produced in pair or in single state. At LHC tt¯ production is 90% through gluon fusion and 10% through quark annihilation. At designed luminosity of LHC, eight million events of tt¯ pairs will be produced per year. The kinematic characteristics of events are studied with exactly one isolated muon in association with hard jets and exhibiting substantial missing transverse energy. The analysis is based on 0.959 fb−1 data (run number 165088-167913) collected by CMS experiment in 2011. Based on synchronization, data is processed and compare with MC for different tt¯ parameters.