Missing Transverse Momentum $(Pt_{miss})$ in PbPb collusions with the CMS detector at the LHC

In this document, a brief description of CMS detector and Data sets are presented is section 2. A definition of P tmiss is given in section 3. Invariant mass of Z boson and P tmiss in PbPb collision with an identified Z boson and the different events selections along the data and Monte Carlo (MC) simulation used are provided in section 4. Transverse mass of W boson and P tmiss in PbPb collision with an identified W boson and the different events selections along the data and Monte Carlo (MC) simulation used are shown in section 5 . A summary is given in Selection 6.