We conduct the study of CP violation in ttbar events decaying into the dilepton channel(ee, mumu, and emu), collected by the CMS experiment at a centre-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 35.9 fb^-1. In this search, two physics observables (O1, O3), which are the Levi-Civita tensors of the four vectors of leptons, b quark jets and top quarks, are probed. These observables allow us to test the CP-odd correlation. Asymmetries of a physics observable are measured. The chromoelectric dipole moment (CEDM) of the top quark is extracted from the linear correlation between CEDM and asymmetries. Combination of three channels for the CEDM is also presented.
ZOOM Link :
https://cern.zoom.us/j/65380295140?pwd=QW9tWnRORk91MjV1dmxFc2FRejM1UT09
Passcode : 059172